CN207638886U - A kind of number lithium electricity megaphone circuit - Google Patents
A kind of number lithium electricity megaphone circuit Download PDFInfo
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- CN207638886U CN207638886U CN201721168707.9U CN201721168707U CN207638886U CN 207638886 U CN207638886 U CN 207638886U CN 201721168707 U CN201721168707 U CN 201721168707U CN 207638886 U CN207638886 U CN 207638886U
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Abstract
The utility model is related to a kind of digital lithium electricity megaphone circuit, which includes propaganda directed to communicate recording master control control circuit, button control circuit, storage music recording circuit, power amplification circuit, 3.3V voltage stabilizings circuit and charging control line；Using the utility model, processing is digitized to voice signal by digital signal processing chip, record length can be lengthened to 96 seconds and can store chord music；Delay function when increasing playback realizes intermittent playback content；Four function buttons select touch-switch and can arbitrary switching on and shutting down, overcome traditional megaphone and use self-lock switch, service life is short and the shortcomings that being easily introduced mechanicalness noise when recording, and lithium battery power supply is used, realize low-voltage, low-power consumption, high efficiency, height output, purpose with long service life.
Description
Technical field
The utility model is related to a kind of digital lithium electricity megaphone circuits.
Background technology
Megaphone is a kind of with the portable public address equipment propagandaing directed to communicate, record, playback, music and volume control.It is logical
Often it is made of microphone, function control and power amplifier output circuit and loudspeaker.It is easy to carry since megaphone appearance is light and handy, extensively
Applied to huckster, supermarket's advertising campaign, rescue and relief work, the uses such as tour guide.Traditional megaphone is mostly analog line processing letter
Number, record length is general only 6 seconds short, and effect is poor, and reproduction fidelity of propagandaing directed to communicate is low, matched monotony of music, and common simulation power amplifier
For chip to voltage request height, power consumption is big.Traditional megaphone, which is mostly used dry cell or lead-acid battery power supply, dry cell, to charge repeatedly
It uses, deficiency in economic performance, and discarded battery environmental pollution is serious.Although lead-acid battery energy Reusability, charges repeatedly
Number is few, than can it is low, cruising ability difference and not environmentally.
Utility model content
The purpose of this utility model is to provide record length extension, has playback delay function, realizes low voltage power supply,
Low-power consumption, high efficiency, output power is high and uses a kind of digital lithium electricity megaphone circuit of lithium battery power supply.
The technical scheme adopted by the utility model is that：A kind of number lithium electricity megaphone circuit, it is characterised in that it includes crying out
Words recording master control control circuit, button control circuit, storage music recording circuit, power amplification circuit, 3.3V voltage stabilizings circuit and
Charging control line；Wherein：
The recording master control control circuit of propagandaing directed to communicate is that the 13rd feet of main control chip HS1000 are connected and VOUT phases with R1 and R2
Even, capacitance C1 and C2 are in parallel；The 12nd feet of main control chip HS1000 are connected with R6, and it is in parallel to power supply that R5 is connected in series to MIC+, C3 and R6
Filtering；MIC+ and C4 and R8 are connected in series to the base stage of Q1, and R4 connect with Q1 collectors, R7 and Q1 base stages and collector parallel connection, R9 with
It is connected in series to after C7 parallel connections on the 11st foot MIC of HS1000；
The button control circuit is that the one end touch-switch S1 is connected with ground wire, after the other end is connected with R29 and master control
The 7th foot KEYIN of chip HS1000 is connected, and is connected with V33 after R29 and R21 series connection；The one end touch-switch S2 is connected with ground wire,
The other end and R23, R29 are connected after connecting with the 7th foot KEYIN of main control chip HS1000, R29 and R21 connect after with V33 phases
Even；The one end touch-switch S3 is connected with ground wire, the other end and R24, R29 series connection after and main control chip HS1000 the 7th foot KEYIN
It is connected, is connected with V33 after R29 and R21 series connection；The one end touch-switch S4 is connected with ground wire, the other end and R25, R29 series connection after and
The 7th foot KEYIN of main control chip HS1000 is connected, and is connected with V33 after R29 and R21 series connection, the one end touch-switch S5 and ground wire phase
Even, be connected with the 7th foot KEYIN of main control chip HS1000 after the other end and R26, R29 series connection, R29 and R21 connect after with V33
It is connected；The one end touch-switch S6 is connected with ground wire, the other end and R27, R29 series connection after and main control chip HS1000 the 7th foot
KEYIN is connected, and V33 is connected after R29 connects with R21；
The storage music recording circuit be after V33 connects with R13 respectively with the 3rd foot WP of U3 M25P40, the 7th foot HLD
It is connected with the 8th foot VCC, is parallel to ground with C10 and C15；The 10th foot CS series windings of U3 M25P40 the 1st foot CS and master control HS1000；U3
The 9th foot DO series windings of M25P40 the 2nd foot DO and master control HS1000；The 5th foot DI of U3 M25P40 are connected with the 6th foot DI of master control HS1000；
The 6th foot SCK of U3 M25P40 are connected with the 5th foot CLK of master control HS1000；
The power amplification circuit is the ends VOUT and R2 VOUT series connection, then connects with R10, R11 and C8 connect again respectively
To the 4th foot of power amplifier chips HT6872；The ends MICOUT and C5 are connected, then are connected respectively with R12, R11 and C8, then are connected in series to power amplifier
The 4th foot of chip HT6872；VOLL is connected with the 15th feet of main control chip HS1000, then with R17 connect, then respectively with R11 and
C8 connects is connected in series to the 4th foot of power amplifier chips HT6872 again；VOLM is connected with the 2nd feet of main control chip HS1000, is then gone here and there with R16
Connection, then connect with R11 and C8 be connected in series to the 4th foot of power amplifier chips HT6872 again respectively；The 3rd foot of VOLH and main control chip HS1000
It is connected, then connects with R22, arrive Q2 base stages, then the collector of Q2 and R15 series connection, then connects with R11 and C8 connect again respectively
To the 4th foot of power amplifier chips HT6872；MUTE is connected with the 14th feet of main control chip HS1000, then connects with R18, R18 and R19
Parallel connection is connected in series to the 4th foot of power amplifier chips HT6872 again；The poles the N series connection of VBAT and diode D2 is connected in series to power amplifier chips again
The 6th foot VDD of HT6872；
The 3.3V voltage stabilizing circuits are that VBAT with JP4 lithium batteries are connected, while being connected in series to the of U4 3.3V voltage stabilizing chips
3 foot VIN, U3 the 1st foot output 3.3V voltages connect with V33, C13, C14, C1 are in parallel with V33；
The charging control line is JP3 direct current 5V charge ports to be connected with R30, D2 series connection and VBAT lithium batteries, R31 and
Q3 base series and and D2, R30 it is in parallel, then connect with VBAT；Q3 collectors are connected with R32, are then connected again with LED1.
Using the utility model, processing, record length are digitized to voice signal by digital signal processing chip
96 seconds can be lengthened to and chord music can be stored；Delay function when increasing playback realizes intermittent playback content；Four
Function button select touch-switch and can arbitrary switching on and shutting down, overcome traditional megaphone use self-lock switch, service life it is short and
The shortcomings that mechanicalness noise is easily introduced when recording, and use lithium battery power supply, realizes low-voltage, low-power consumption, and high efficiency is high defeated
Go out, purpose with long service life.
Description of the drawings
Fig. 1 is the recording master control control circuit figure of propagandaing directed to communicate of the utility model.
Fig. 2 is the button control circuit figure of the utility model.
Fig. 3 is the storage music recording line map of the utility model.
Fig. 4 is the power amplification line map of the utility model.
Fig. 5 is the 3.3V voltage stabilizing line maps of the utility model.
Fig. 6 is the utility model and charging control line figure.
Fig. 7 is the circuit diagram of the utility model.
Specific implementation mode
Utility model is described further with reference to specific embodiment.
Referring to Fig.1, which is main control chip
The 13rd feet of HS1000 are connected with R1 and R2 series connection with VOUT, and capacitance C1 and C2 are in parallel；The 12nd feet of main control chip HS1000 are gone here and there with R6
Connection, it is in parallel to power supply filtering that R5 is connected in series to MIC+, C3 and R6；MIC+ and C4 and R8 is connected in series to the base stage of Q1, R4 and Q1 collectors
Series connection, R7 and Q1 base stages and collector are in parallel, are connected in series to after R9 and C7 parallel connections on the 11st foot MIC of HS1000.
With reference to Fig. 2, which is the one end touch-switch S1 and ground wire
It is connected, is connected with the 7th foot KEYIN of main control chip HS1000 after the other end is connected with R29, V33 is connected after R29 connects with R21；
The one end touch-switch S2 is connected with ground wire, the other end and R23, R29 series connection after and main control chip HS1000 the 7th foot KEYIN phases
Even, V33 is connected after R29 connects with R21；The one end touch-switch S3 is connected with ground wire, the other end and R24, R29 series connection after and master control
The 7th foot KEYIN of chip HS1000 is connected, and V33 is connected after R29 connects with R21；The one end touch-switch S4 is connected with ground wire, separately
One end is connected after connecting with R25, R29 with the 7th foot KEYIN of main control chip HS1000, and V33 is connected after R29 connects with R21, gently
The one end switch S5 is touched with ground wire to be connected, the other end is connected after connecting with R26, R29 with the 7th foot KEYIN of main control chip HS1000,
V33 is connected after R29 connects with R21；The one end touch-switch S6 is connected with ground wire, the other end and R27, R29 series connection after and master control core
The 7th foot KEYIN of piece HS1000 is connected, and V33 is connected after R29 connects with R21.
With reference to Fig. 3, which divided after V33 connects with R13
It is not connected with the 3rd foot WP of U3 M25P40, the 7th foot HLD and the 8th foot VCC, is parallel to ground with C10 and C15；The 1st feet of U3 M25P40
The 10th foot CS series windings of CS and master control HS1000；The 9th foot DO series windings of U3 M25P40 the 2nd foot DO and master control HS1000；U3 M25P40
5th foot DI is connected with the 6th foot DI of master control HS1000；The 6th foot SCK of U3 M25P40 are connected with the 5th foot CLK of master control HS1000.
With reference to Fig. 4, which is the ends VOUT and R2 VOUT series connection, then
It connects respectively with R10, R11 and C8 and is connected in series to the 4th foot of power amplifier chips HT6872 again；The ends MICOUT and C5 connect, then respectively with
R12, R11 and C8 connect, then are connected in series to the 4th foot of power amplifier chips HT6872；VOLL is connected with the 15th feet of main control chip HS1000,
Then it connects with R17, then connects with R11 and C8 be connected in series to the 4th foot of power amplifier chips HT6872 again respectively；VOLM and main control chip
The 2nd feet of HS1000 are connected, and then connect with R16, then connect with R11 and C8 be connected in series to the 4th of power amplifier chips HT6872 again respectively
Foot；VOLH is connected with the 3rd feet of main control chip HS1000, then connects with R22, arrives Q2 base stages, then the collector of Q2 and R15 strings
Connection, then connect with R11 and C8 be connected in series to the 4th foot of power amplifier chips HT6872 again respectively；MUTE and main control chip HS1000 the 14th
Foot is connected, and then connects with R18, R18 and R19 parallel connections are connected in series to the 4th foot of power amplifier chips HT6872 again；VBAT and diode D2
The series connection of the poles N be connected in series to the 6th foot VDD of power amplifier chips HT6872 again.
With reference to Fig. 5, which is that VBAT with JP4 lithium batteries are connected,
Be connected in series to the 3rd foot VIN of U4 3.3V voltage stabilizing chips simultaneously, the 1st feet of U3 output 3.3V voltages are connected with V33, C13, C14, C1 and
V33 is in parallel.
With reference to Fig. 6, a kind of the charging control line JP3 direct current 5V charge ports and R30, D2 of digital lithium electricity megaphone circuit
Series connection is connected with VBAT lithium batteries, R31 and Q3 base series and and D2, R30 parallel connection, then with VBAT series connection；Q3 collectors with
R32 connects, and then connects again with LED1.
Referring to Fig.1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, a kind of concrete operating principle of digital lithium electricity megaphone circuit is such as
Under.
A. it propagandas directed to communicate function：1）Microphone MIC passes through R6 100R, R5 6.2K, to microphone power by MCU HS1000；2）
When pressing touch-switch S1, S1 and ground conductive, V33 make the 7th foot KEY1 of main control chip HS1000 by R21 10K, R29 0R
A 0V voltages are generated, when main control chip HS1000 detects 0V voltages, HS1000 controls megaphone booting, HS1000 the 7th
Foot KEY1 is high level 3.3V keeps status indicator lamp bright by R28 current limlitings partial pressure, in the state of propagandaing directed to communicate；3）Alignment microphone is propagandaed directed to communicate
Audio signal enters power amplifier by C5 104 and R12 15K, R11 2K, C8 104 and inputs the 4th foot, and loudspeaker is pushed by power amplifier HT6872
Start to propaganda directed to communicate.
B. sound-recording function：1）Press recording touch-switch S2, S2 with ground be connected, V33 by R21 10K,
R23 1K, R29 0R make the 7th foot KEY1 of main control chip HS1000 generate a 0.3V voltages, work as main control chip
When HS1000 detects 0.3V voltages, HS1000 controls megaphone booting, and the 7th foot KEY1 of HS1000 are that high level 3.3V passes through
R28 current limlitings partial pressure keeps status indicator lamp bright, and be delayed the flicker of 2 seconds rear indicator lights, and megaphone is in recording state, can record length it is long
Up to 96 seconds；2）The amplification electricity that microphone MIC is formed through C4 104, R8 10K and R4 1K, R7 100K and Q1 is directed at when recording
Road is amplified recorded audio signals, then enters the 11st feet of MCU through C6 104.After MCU is handled, by the 5th foot SCK of MCU, the 6th
Foot DI, the 9th foot DO and the 10th foot CS are respectively with the 6th foot of storage chip, and the 5th foot, the 2nd foot and the 1st foot be connected, will be in recording
It stores and is put into storage chip U3 M25P40；3）When pressing record button again, megaphone shutdown, End of Tape.
C. playback and playback delay function：1）It presses playback touch-switch S3, V33 and passes through R21 10K, R24
2K R29 0R make the 7th foot KEY1 of main control chip HS1000 generate a 0.45V voltages, as main control chip HS1000
When detecting 0.45V voltages, HS1000 controls megaphone booting, and indicator light is bright, is in playback state；2）Work as main control chip
When HS1000 checks playback instruction, HS1000 the 5th foot SCK, the 6th foot DI, the 9th foot DO and the 10th foot CS are respectively and storage chip
The 6th foot, the 5th foot, the 2nd foot and the 1st foot are connected, recording substance are recalled from storage chip U3 M25P40 through master control core
Piece HS1000 the 13rd foot OUT, R1 3.9K, R2 3.9K, C1 103, C2 103 arrive VOUT, then through R10 10K, R11 2K, C8
104, which enter power amplifier, inputs the 4th foot, and loudspeaker playback content is pushed by power amplifier HT6872.
D. playback delay function：1）It is long to pin playback button and do not put, when main control chip HS1000 is detected
Start timing when long-press playback button, the time for pinning playback button determines the length of interval time；2）Close playback
After be again turned on playback, then the interval time set by last time can automatically restore to original normal time, such as：It pins and puts when playback
Key 5 seconds, then repeatedly the time interval between playback is exactly 5 seconds；So repeatedly the time interval of playback is exactly long-press within 30 seconds
30 seconds.
E. music function：1）It presses music touch-switch S4, V33 and passes through R21 10K, R25 3.3K R29
0R makes the 7th foot KEY1 of main control chip HS1000 generate a 0.6V voltages, when main control chip HS1000 is detected
When 0.6V voltages, HS1000 controls megaphone booting, and indicator light is bright, in music status is played, can play chord music；2）When
When main control chip HS1000 checks musical instruction, HS1000 the 5th foot SCK, the 6th foot DI, the 9th foot DO and the 10th foot CS respectively and
6th foot of storage chip, the 5th foot, the 2nd foot and the 1st foot are connected, and music content is recalled from storage chip U3 M25P40
Through the 13rd foot OUT of main control chip HS1000, R1 3.9K, R2 3.9K, C1 103, C2 103, VOUT is arrived, then through R10 10K,
R11 2K, C8 104 enters power amplifier and inputs the 4th foot, pushes loudspeaker to play music content by power amplifier HT6872.
F. volume add-minus function：1）Pressing volume adds touch-switch S5, V33 to pass through R21 10K, R26 6.8K
R29 0R make the 7th foot KEY1 of main control chip HS1000 generate a 0.85V voltages, when main control chip HS1000 is detected
When to 0.85V voltages, HS1000 control megaphones make volume increase step by step.It presses volume down touch-switch S6, V33 and passes through R21
10K, R26 6.8K R29 0R make the 7th foot KEY1 of main control chip HS1000 generate a 1V voltages, when main control chip HS1000 is examined
When measuring 1V voltages, HS1000 control megaphones make volume reduce step by step；2）Another way is divided after main control chip HS1000 processing
Not through the 3rd foot VOLH of the 2nd foot VOLM of main control chip HS1000, the 15th foot VOLL respectively with R16 2K, R22 20K, R17 10K
It is small to control volume plus-minus.
G. lithium battery function：1）Charge function is begun to after connecting 5V DC power supplies by JP3 to lithium
Battery charge, by Q3 9015C, 2 Europe R31 2K, R30 and anti-reverse diode D2 SS32 composition charging and
Voltage comparing cell charges to lithium battery, and when lithium battery voltage is less than 4.2V, Q3 conductings make state refer to through resistance R31 680R
Show that lamp is bright, instruction charging, when voltage is higher than 4.2V, Q3 extinguishes by status indicator lamp, illustrates that lithium battery has been filled with；2）Power supply
Function, JP4 are connected with lithium battery, all the way through U4 3.3V voltage stabilizing chips, to exporting a constant 3.3V electricity after lithium battery voltage stabilizing
Pressure, through C13 220UF, C14 104, C16 10UF filtering, respectively to key circuit, master control main control chip U1 HS1000 are deposited
Storage chip U3 M25P40 are powered, and another way directly powers to D class power amplifier U2 HT6872.
Claims (1)
1. a kind of number lithium electricity megaphone circuit, it is characterised in that it includes propaganda directed to communicate recording master control control circuit, button control line
Road, storage music recording circuit, power amplification circuit, 3.3V voltage stabilizings circuit and charging control line；Wherein：The record of propagandaing directed to communicate
Sound master control control circuit is that the 13rd feet of main control chip HS1000 are connected with R1 and R2 series connection with VOUT, and capacitance C1 and C2 are in parallel；It is main
The 12nd feet of control chip HS1000 are connected with R6, and it is in parallel to power supply filtering that R5 is connected in series to MIC+, C3 and R6；MIC+ connects with C4 and R8
To the base stage of Q1, R4 connects with Q1 collectors, R7 and Q1 base stages and collector are in parallel, and HS1000 the is connected in series to after R9 and C7 parallel connections
On 11 foot MIC；The button control circuit is that the one end touch-switch S1 is connected with ground wire, after the other end is connected with R29 and main
The 7th foot KEYIN for controlling chip HS1000 is connected, and is connected with V33 after R29 and R21 series connection；The one end touch-switch S2 and ground wire phase
Even, be connected with the 7th foot KEYIN of main control chip HS1000 after the other end and R23, R29 series connection, R29 and R21 connect after with V33
It is connected；The one end touch-switch S3 is connected with ground wire, the other end and R24, R29 series connection after and main control chip HS1000 the 7th foot
KEYIN is connected, and is connected with V33 after R29 and R21 series connection；The one end touch-switch S4 is connected with ground wire, the other end and R25, R29 string
Be connected with the 7th foot KEYIN of main control chip HS1000 after connection, R29 and R21 series connection after be connected with V33, the one end touch-switch S5 and
Ground wire is connected, and the other end and R26, R29 are connected after connecting with the 7th foot KEYIN of main control chip HS1000, after R29 and R21 connect
It is connected with V33；The one end touch-switch S6 is connected with ground wire, the other end and R27, R29 series connection after and main control chip HS1000 the 7th
Foot KEYIN is connected, and is connected with V33 after R29 and R21 series connection；The storage music recording circuit is divided after V33 connects with R13
It is not connected with the 3rd foot WP of U3 M25P40, the 7th foot HLD and the 8th foot VCC, is parallel to ground with C10 and C15；The 1st feet of U3 M25P40
The 10th foot CS series windings of CS and master control HS1000；The 9th foot DO series windings of U3 M25P40 the 2nd foot DO and master control HS1000；U3 M25P40
5th foot DI is connected with the 6th foot DI of master control HS1000；The 6th foot SCK of U3 M25P40 are connected with the 5th foot CLK of master control HS1000；It is described
Power amplification circuit be the ends VOUT and R2 VOUT series connection, then connect with R10, R11 and C8 be connected in series to power amplifier chips again respectively
The 4th foot of HT6872；The ends MICOUT and C5 are connected, then are connected respectively with R12, R11 and C8, then are connected in series to power amplifier chips HT6872
The 4th foot；VOLL is connected with the 15th feet of main control chip HS1000, then connects with R17, then connect with R11 and C8 go here and there again respectively
It is linked to the 4th foot of power amplifier chips HT6872；VOLM is connected with the 2nd feet of main control chip HS1000, then connects with R16, then distinguish
It connects with R11 and C8 and is connected in series to the 4th foot of power amplifier chips HT6872 again；VOLH is connected with the 3rd feet of main control chip HS1000, then
It connects with R22, arrives Q2 base stages, then the collector of Q2 and R15 series connection, then connect with R11 and C8 be connected in series to power amplifier core again respectively
The 4th foot of piece HT6872；MUTE is connected with the 14th feet of main control chip HS1000, then connects with R18, R18 and R19 parallel connections are gone here and there again
It is linked to the 4th foot of power amplifier chips HT6872；The poles the N series connection of VBAT and diode D2 is connected in series to the 6th of power amplifier chips HT6872 again
Foot VDD；The 3.3V voltage stabilizing circuits are that VBAT with JP4 lithium batteries are connected, while being connected in series to the 3rd of U4 3.3V voltage stabilizing chips
The 1st foot of foot VIN, U3 output 3.3V voltages are connected with V33, and C13, C14, C1 are in parallel with V33；The charging control line is
JP3 direct current 5V charge ports and R30, D2 connect and VBAT lithium batteries are connected, R31 and Q3 base series and and D2, R30 parallel connection, so
It connects afterwards with VBAT；Q3 collectors are connected with R32, are then connected again with LED1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721168707.9U CN207638886U (en) | 2017-09-13 | 2017-09-13 | A kind of number lithium electricity megaphone circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721168707.9U CN207638886U (en) | 2017-09-13 | 2017-09-13 | A kind of number lithium electricity megaphone circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207638886U true CN207638886U (en) | 2018-07-20 |
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ID=62861992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201721168707.9U Active CN207638886U (en) | 2017-09-13 | 2017-09-13 | A kind of number lithium electricity megaphone circuit |
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| Country | Link |
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| CN (1) | CN207638886U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110475195A (en) * | 2019-07-10 | 2019-11-19 | 深圳市世纪南方科技有限公司 | Applied to the control method of unmanned plane megaphone, device, system and equipment |
-
2017
- 2017-09-13 CN CN201721168707.9U patent/CN207638886U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110475195A (en) * | 2019-07-10 | 2019-11-19 | 深圳市世纪南方科技有限公司 | Applied to the control method of unmanned plane megaphone, device, system and equipment |
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