JPS60119154A - Remote control circuit - Google Patents

Abstract

PURPOSE:To simplify circuit constitution and to constitute the circuit of economical parts by changing a sending level for each key to send a signal, and on the receiving side, discriminating the level and actuating a relay corresponding to the depressed key. CONSTITUTION:A keyboard 1 in a transmission part 1 is connected to a voltage discriminating circuit 2 in a receiving part through two lines l1, l2 and the output of the voltage discriminating circuit 2 is connected to a relay part 3. The voltage Vcc and one terminal of switches S1-Sn of the keyboard 1 is connected to the line l respectively. A level detecting integrated circuit 6 in the voltage discriminating circuit 2 receives a signal from the keyboard through the line l2. When the switch S2 is depressed, 3.8V voltage is sent to the line l2 and the level detecting integrated circuit 6 sends a signal through a line l4. Consequently, a relay 13 receives the signal through the line l4 and is driven to control an electric apparatus or the like corresponding to the relay 13.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a remote control circuit for remotely controlling electrical equipment and the like.

BACKGROUND ART A prior art remote control circuit is comprised of a transmitter that sends a preset voltage and a receiver that receives the voltage. The receiving section detects the voltage level sent from the transmitting section and controls electrical equipment. Such a remote control circuit has a drawback that the voltage discrimination circuit of the receiving section is complicated and cannot be easily constructed.

Purpose An object of the present invention is to solve the above-mentioned technical problems and to provide a remote control circuit that has a simple circuit configuration and can be constructed from low-cost components.

Embodiment @1 FIG. 1 is a block diagram showing the overall configuration of an embodiment of the present invention. The keyboard 1 of the transmitter has two lines e1,
12, it is connected to the voltage discrimination circuit 2 of the receiving section. The output of the voltage discrimination circuit 2 is connected to the relay part 3.

FIG. 2 is a detailed electrical circuit diagram of the keyboard J shown in FIG. Line 11 is provided with a voltage Vcc. That line! 1 is connected to one terminal of each of the switches 81 to Sn. The other terminal of switch S1 is connected to line 12. The other terminals of switches 82-Sn are connected to line 12 via resistors R2-Rn. Line l! The voltage delivered to switch 2 is
2=Resistance connected to Sn=R1=It varies depending on the resistance value of Rn.

FIG. 3 is an electrical circuit diagram of one embodiment of the voltage discrimination circuit 2 of the receiving section shown in FIG. 1. Line 11 has a voltage V c
c is given. Integrated circuit for level detection (product name AN6
876) 6 is supplied with a reference voltage via a resistor 5. The level detection integrated circuit 6 is connected to the line l! 2 receives signals from the keyboard 1. See you again! 2 is grounded via a resistor 4. A voltage V is applied to output lines 13 to 17 of the level detection integrated circuit 6 via resistors 7 to 11.
c c is given.

FIG. 4 is an equivalent circuit diagram of the level detection integrated circuit 6 shown in FIG. 3. The input voltage applied to line 12 is 1°5
At 8-2°02V, an output signal appears on line 17. When the input voltage is between 2°11 and 2°69V, line r6
An output signal appears. Also input voltage power 2.64~3.3
6 When V, line l! 5D output signal appears, line l! when the input voltage is 3.57-4,03 V. An output signal appears at 4. Also, when the input voltage is 4.1V or higher, line l! An output signal appears at 3. In FIG. 3, resistor 4 is a voltage matching resistor, and resistors 7 to II are pull-up resistors.

FIG. 5 is an electrical circuit diagram of one embodiment of the relay part 3 shown in FIG. 1. line, e4 is the toggle terminal TI of relay 12
connected to. Line t! 4 is connected to the toggle terminal T2 of the relay 13. Line 15 is connected to toggle terminal T3 of relay 14, and line e6 is connected to toggle terminal T4 of relay 15. With the above circuit configuration, relays 12 to 12 are connected by signals given to lines 13 to J6.
15 are respectively driven. For example, the operation of this circuit will be explained assuming that the switch S2 of the keyboard 1 shown in FIG. 2 is pressed. When the switch S2 is pressed, a voltage of 3.8 V is sent to the line e2, and the level detection integrated circuit 6 of FIG. Therefore, relay 13 shown in No. 514
is line t! 4 and is driven. As a result, electrical equipment and the like corresponding to the relay 13 are controlled. However, the above-mentioned relays 12 to 15 are relays containing integrated circuits, and can be directly driven by an output at a TTL (transistor e transistor logic) level. Also, various functions can be obtained by selecting the input terminal.

. FIG. 6 is an electric circuit diagram of another embodiment of the voltage discrimination circuit 2 of the receiving section shown in FIG. This circuit controls 13 electrical devices. Line 12 is grounded through resistor 19 and connected to the cathode of Zener diode 26 through resistor 2o. The level detection integrated circuits 16 to 18 are the level detection integrated circuit 6 of FIG.
It has the same circuit configuration as . The cathode of the Zener diode 26 is connected to the level detection integrated circuit j6 via the line e21, and the resistor 21 provides a reference voltage for the level detection integrated circuit 16. Anode of Zener diode 26 and Zener diode 25
The connection point is connected to the level detection integrated circuit 17 via line /22. resistance 2
Reference numeral 2 denotes a level detection integrated circuit 7 which provides a reference voltage.

The anode of the Zener diode 25 is grounded via a resistor 24, and the anode of the Zener diode 25 is connected to the level detection integrated circuit 18 via a line e23. The resistor 23 provides a reference voltage for the level detection integrated circuit 18.

The level detection integrated circuits 16 to 18 are configured in 1. as described above.
The input voltage in the range of 58 to 4.1V is discriminated into five levels.

The level detecting integrated circuit 16 uses the Zener diodes 25 and 26 to discriminate levels in the range of 0 to 411 volts and sends out five outputs. The level detection integrated circuit 17 discriminates levels in the range of 4.7 to 8.8V and sends out five outputs. Level detection integrated circuit】8 is 9.4 to 1
It discriminates the level of 3.5V voltage and sends out 5 outputs. However, since the most significant outputs of the level detection integrated circuit 16 and the level detection integrated circuit 17 overlap with the output above the most significant output, an output of 5)<3-2=13 is obtained. The resistor 19 is a resistor for input voltage matching, and the resistor 20
is a resistor for protecting Zener diodes 25 and 26. The resistors 21 to 23 are connected to the level detection integrated circuits 16 to 23.
18 resistors for adjusting the output current. Resistor 24 is a load resistance. Note that illustration of the pull-up resistor is omitted. Through these operations, signals for controlling 13 electrical devices are sent from lines 18 to /20, respectively.

FIG. 7 is an electrical circuit diagram of still another embodiment of the voltage discrimination circuit 2 of FIG. Line l! A voltage Vcc is applied to (2). A reference voltage is applied to the level detection integrated circuit 27 via a resistor 30.

Signal from keyboard 1, line 12 and resistor 29
The signal is applied to the level detection integrated circuit 27 via. Line /2 is grounded via resistor 28. The output of the level detection integrated circuit 27 is connected to the line /! through resistors 31 to 35. 1, respectively. Further, the outputs of the level detection integrated circuit 27 are connected to output lines /24 to /28 via capacitors 41 to 45, respectively. Line 124~l again! 28 is connected to line 1 through resistors 36-40.
1, respectively. This level detection integrated circuit 2
The output of 7 is connected to capacitors 41-45 and resistors 36-4.
1 is converted into a pulse signal by each differentiating circuit formed by line l! 24~l! 28. In such a circuit, pulse control 8 is performed so that the output is always off when the electrical equipment is powered off. That is, this is effective for toggle operations in which on/off operations are repeated every time a key on the keyboard 1 is pressed.

FIG. 8 is an electric circuit diagram of another embodiment of the voltage discrimination circuit 2 of FIG. 1. In FIG. 8, components corresponding to those in FIG. 7 are given the same reference numerals. Line 12 is connected through resistor 46 to the pace of transistor 48, and line 12 is connected through resistor 29 to the collector of transistor 48.

A capacitor 47 is connected between the base and emitter of the transistor 48. The emitter of transistor 48 is grounded and connected to line! ! 2 is grounded via a resistor 28 and connected to the level detection integrated circuit 27 via a resistor 29. A voltage Vcc is applied to line 11, and line I!
1 is connected to the level detection integrated circuit 27 via a resistor 30. Each output of the level detection integrated circuit 27 is connected to a resistor 31
Rye/l through ~35! 1, respectively. By connecting the transistor 48 in this way, the differentiating resistors 36 to 40 and capacitors 41 to 45 shown in FIG. 7 can be omitted, and an appropriate pulse width can be obtained by adjusting the capacitors 46 and 47. . That is, the input signal applied to line f2 charges capacitor 47 via resistor 46, thereby causing transistor 48 to conduct. Therefore, a pulsed signal is given to the level detection integrated circuit 27, and its output is also sent out as a pulsed signal. This allows the output of the level detection integrated circuit 27 to be directly connected to the controlled relay. Although the circuit C shown in FIG. 8 shows outputs in the case of five outputs, such a circuit is more effective when the number of outputs is larger.

FIG. 9 shows a power failure detection circuit 51A according to an embodiment of the present invention.
It is an electrical circuit diagram including. Line l! l has a voltage Vcc
is given. Line l again! l is grounded via resistor 51 and resistor 52. A connection point between resistor 51 and resistor 52 is connected to the base of transistor 56. Line I again! 1 is connected to the z-diode 53 anode. The cathode of the diode 53 is connected to one end of a capacitor 54, one end of a resistor 55, one end of a resistor 58, and each terminal S of an IC (integrated circuit) relay 59, respectively.

The voltage Vc is applied to the IC relay 59 via the diode 53.
c is given. The other end of capacitor 54 is grounded, and the other end of resistor 55 is connected to the collector of transistor 56. The collector of transistor 57 is connected to the other end of resistor 58, and its base is connected to the collector of transistor 56.

The emitters of transistors 56 and 57 are each grounded. A collector of transistor 57 is connected to each terminal R of IC relays 59 to 62.

Line f30~line l! 33 are respectively given signals from the voltage discrimination circuit 2 shown in FIG.

Line l! 30 is connected to terminal T of IC relay 59, and line /31 is connected to terminal T of IC relay 60. Line 1!32 is connected to terminal T of IC relay 61, and line !32 is connected to terminal T of IC relay 61. ! 33 is connected to terminal T of IC relay 62.

FIG. 10 is an equivalent circuit diagram of ICIJ circuits 9 to 62 shown in FIG. Every time a pulse signal is applied to terminal T, 2
The wire-wound latching relay L1o has a toggle operation of ON/OFF.
Works off. When a pulse signal is applied to terminal M, two-winding latching relay LIO is turned on only while the pulse signal is present. When a pulse signal is applied to terminal S, two-winding latching relay LIO is turned on. When a pulse signal is applied to terminal T, two-winding latching relay LIO is turned off.

Many relays that toggle like this are of the latching type, but latching relays have the disadvantage that they do not recover in the event of a power outage. To prevent this, a power failure detection circuit 51 shown in FIG.
A is provided. Voltage applied to line 11 V c
When c decreases, transistor 56 is turned off and transistor 57 is turned on. As a result, the collector voltage of the transistor 57 becomes Ov. Since the collector of transistor 57 is connected to each terminal R of IC relays 59-62, all IC relays 59-62 are reset (turned off). The capacitor 54 connects each IC relay 59 when the power is turned off.
This is for storing electric charge for operating the circuits 62 to 62. The diode 53 is for preventing the charge from flowing back to the power supply, and the resistors 5, 52 are for providing an appropriate operating voltage to the transistor 56.

FIG. 11 is an electrical circuit diagram including a power-on reset circuit 97 according to an embodiment of the present invention. Line e41~/44
is given a signal from the voltage discrimination circuit 2 shown in FIG. Line I! 41 is R8T type clip flop 81
is connected to the terminal T of the line l! 42 is connected to the terminal T of the R8T type flip-flop 82. Line I! 43
is connected to the terminal T of the R8T type flip-flop 83,
Line e44 is the terminal T of the R8T type flip-flop 84.
connected to. A voltage Vcc is applied to each terminal S of the R8T type flip-flops 81-84.

In power-on reset circuit 97, voltage VcC is grounded via capacitor 93 and resistor 94, and the connection point between capacitor 93 and resistor 94 is connected to the cathode of diode 95 and the input terminal of NOT gate 96. The anode of diode 95 is grounded. NOT gate 9
6 output terminals are R8T type flip-flops 81 to 84.
is connected to each terminal R of. R8T type flip-flop 8
Terminal Q of R8T type flip-flop 82 is connected to relay 90 via driver circuit 86 . R8T
The terminal Q of the R8T type flip-flop 83 is connected to the relay 91 via the driver circuit 87, and the terminal Q of the R8T type flip-flop 84 is connected to the relay 92 via the driver circuit 88.
connected to.

The operation of this circuit is also as explained in FIG.
When a pulse signal is applied to each terminal T of the T-type flip-flops 81 to 84, the relay 89 performs a toggle operation of turning on and off. Terminals R of R8T type flip-flops 81 to 84
Relays 89 to 92 are activated by a reset signal given to
are set (off). The power-on reset circuit 97 includes a capacitor 93 and a resistor 9 when the power is turned on.
A time constant of 4 causes the NOT gate 96 to send a reset signal. By this, when the power is turned on, the relay 89 ~
92 is turned off.

In the latching relay and the like in the embodiments described below, the on/off operation may be reversed by switching the connections of the terminals that perform the on/off operation.

Effects As described above, according to the present invention, the circuit configuration is simplified and
This also leads to lower prices.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the overall configuration of an embodiment of the present invention, FIG. 2 is an electric circuit diagram of the keyboard 1 shown in FIG. 1, and FIG.
The figure is an electric circuit diagram of an embodiment of the voltage discrimination circuit 2 shown in FIG.
4 is an equivalent circuit diagram of the level detection integrated circuit 6 of FIG. 3, FIG. 5 is an electric circuit diagram of an embodiment of the relay part 3 of FIG. 7 is an electric circuit diagram of another embodiment of the voltage discrimination circuit 2 shown in FIG. 1; FIG. 8 is an electric circuit diagram of another embodiment of the voltage discrimination circuit 2 of FIG. The circuit diagram, FIG. 9 is an electric circuit diagram including a power failure detection circuit 51A according to an embodiment of the present invention, FIG. 10 is an equivalent circuit diagram of integrated circuit relays 59 to 62 of FIG. 9, and FIG. FIG. 2 is an electrical circuit diagram including a power-on reset circuit 97 according to one embodiment. 1...Keyboard, 2...Voltage discrimination circuit, 3...
Relay part, 6... Level detection integrated circuit, 25.2'
6... Zener diode, 36-40.46... Resistor, 41-45.47... Capacitor, 48... Transistor, 51A... Power failure detection circuit, 97... Power-on reset circuit, l 1+ l 2...Line agent Patent attorney Kei Nishi Part Figure 1 Figure 2 Figure 3 Figure lI 6 Figure 7 Figure 8 Figure 8 Figure 9 Figure 10 Figure 11

Claims (5)

[Claims] (1) A key human power means that sends a preset signal corresponding to each key individually, and a level discrimination based on a preset level range of the signal from the key human power means and sends an output signal. What is claimed is: 1. A remote control circuit comprising a voltage discriminating means for discriminating voltage, and a switching means driven by individually corresponding signals from the voltage discriminating means, characterized in that the voltage discriminating means is constituted by an integrated circuit. (2) The first aspect of the present invention is characterized in that the signal level from the key human power means is divided by a series circuit of constant voltage elements, and a plurality of voltage discrimination means are provided for discriminating the level of each of the divided signals. Remote control circuit as described in section. (3) The remote control circuit according to claim 1, wherein the output signal of the voltage discrimination means is differentiated by a differentiating circuit, converted into a pulse signal, and then applied to the switch means. (4) The remote control circuit according to claim 1, further comprising power failure detection means for detecting a power failure and returning the switch means to the state before operation. (5) The remote control circuit according to claim 1, further comprising power-on reset means for returning the switch means to the state before operation when the power is turned on.