RO126809A2 - Teaching model - Google Patents

Abstract

The invention relates to an automatic system for transferring data from a vinyl disk to a digital system, for example a CD. According to the invention, the system consists essentially of an amplifier (A) and a preamplifier (PA) which are powered by a voltage source (ST), the preamplifier receiving signals from the output of a pick-up (P) which are then amplified by the amplifier (A) and transmitted further through a wireless module (MW) to a computer (PC), where they are downloaded and written on a CD using a computer program.

Description

Deposit date

Didactic model

The invention relates to an automatic data transfer system from the vinyl disc to the CD, in order to automatically transfer the data from the vinyl disc to the CD, a solution is known, available to anyone, by broadcasting the songs, and recording them. on different information storage media, for example the tape recorder.

The disadvantages of this method are:

very poor recording quality;

long time for monitoring this system;

the influence of external factors, given that the recording is made on a tape recorder

The system according to the invention eliminates the disadvantages mentioned above, in that it consists mainly of a power supply, a preamplifier and an amplifier.

The advantages of this system are:

recording quality, very good;

short time for monitoring this system;

external factors do not influence the quality of the recording;

The following is an example of an automatic data transfer system on the cx_-2 010-00269-2 3 -03-2010 vinyl disk on CD, in connection with figures 1 and 2 which represent:

Fig. 1. Block diagram of the system;

Fig. 2. System operation diagram;

By means of an amplifier A and a preamplifier PA which are supplied by a voltage source ST, a preamplifier which takes the signal from the output of a pick-up P and the data are transmitted via a wireless module MW to a PC computer from where they are taken and written to CD using a program in Visual Basic.

If we have a pick-up that has a voltage higher than 3 mV at the output, then we can connect it directly to the sound card of the PC. if the output voltage is 3 mV then the audio signal cannot be picked up by the sound card. in this case a preamplifier is used to pick up the audio signal from the pickup output through the two RCA inputs.

The preamplifier has a jack output and input. The audio signal is picked up by the amplifier through the two RCA inputs, the left channel and the right channel, and amplified by the two LT1115CN8 integrated circuits, which are high-precision amplifiers. The amplified signal is transmitted to the PC via the jack output. inside the preamplifier we have a 24 V relay used for switching between jack and RCA inputs.

The circuit is supplied with a differential voltage of ± 15V, voltage required for the two integrated circuits, and a voltage of 24 V required for tripping and tripping the relay. RIAA type correction is included in the negative reaction of integrated circuits between pins 2 and 6. Jumpers are used to connect or disconnect the amplifier.

if at the output of the pickup we have a voltage of 0.2 mV an amplifier is needed. To connect the amplifier, the jumpers are opened and the amplifier is connected to the preamplifier with the help of the 8 terminals on the board.

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Two LT1028CN8 type integrated circuits are used which ensure a signal amplification of approximately 10 times. The circuit is also supplied with a differential voltage of ± 15V.

The voltage source used ensures a differential voltage of ± 15V used to supply the preamplifier and amplifier, a voltage of 34 V for starting and tripping the relay and an additional voltage of 20 V. For the construction of the circuit we used two rectifier bridges, a transformer with two secondary 15 V, two voltage stabilizers 7815 and 7915. before powering the circuit from the mains I used a power button to close and open the power supply and remove it from the power supply. For the wireless transmission we used a transceiver module from a wireless microphone.

The software module running on the PC is made in Visual Basic, and we will present a source code sequence:

Option Explicit 'The library used to close the window

Private Declare Sub ExitProcess Lib kemel32 (ByVal uExitCode As Long)

Private Sub cmdClose_Click ()

end

End Sub 'Selects a file to record

Private Sub cmdBrowse Click ()

On Error GoTo ErrorHandler cdgBrowse.CancelError = True cdgBrowse.Filter = AII Supported Media Files | *. * CdgBrowse.Flags = & H2 Or & H400 cdgBrowse.ShowOpen 'txtFileOrURL.Text = cdgBrowse.Fil

ErrorHandler:

End Sub

Private Sub cmdMain_Click ()

Unload Me

End Sub ^ 2010-00269-2 3 -03- 2010

· · Function for recording playback

Private Sub cmdPlay_Click ()

Dim i As Integer i = mciSendStringC'play capture from O, O &, O, 0) cmdPlay.Enabled = False 'Enable the PLAY button cmdRecord.Enabled = False cmdStop.Enabled = True

End Sub 'Function to start capturing

Private Sub cmdRecord_Click ()

Dim and As Integer

Dim Alignment As Integer 'close all MCI functions used in previous operations i = mciSendStringC'close all, 0 &, 0, 0)' Open a new .wav file with MCI command i = mciSendStringf'open new type waveaudio alias capture, 0 &, 0 , 0) 'start from start i = mciSendStringf'seek capture to start, 0 &, 0, 0)' start recording

Alignment = Channels * Resolution / 8 'I declared the settings variable for easier handling of the quality of the recordings

Settings = set capture alignment & CStr (Alignment) & bitspersample & CStr (Resolution) & samplespersec & CStr (Rate) & channels & CStr (Channels) & bytespersec & CStr (AIignment * Rate) i = mciSendString (Settings, 0 &, 0, 0)

If i <> 0 Then

MsgBox (Please choose the recording quality!) I = mciSendStringC'stop capture, 0 &, 0, 0) cmdSaveAs.Enabled = False 'Disable save button cmdPlay.Enabled = False' Disable play button cmdRecord.Enabled = True 'Enable button registration cmdStop.Enabled = False 'Disable stop button tmrStatus.Enabled = True' Registration parameters will be displayed

Else i = mciSendStringC'record capture, 0 &, 0, 0) cmdStop.Enabled = True 'Activates stop button

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cmdPlay.Enabled = False 'Disable play button cmdSaveAs.Enabled = False' Disable save button cmdRecord.Enabled = False 'Disable record button tmrStatusTimer tmrStatus.Enabled = True

End If

End Sub 'Function to save the record

Private Sub cmdSaveAs Click ()

Dim i As Integer cdgBrowse.CancelError = True

On Error GoTo ErrHandlerl cdgBrowse.Filter = WAV file (* .wav *) [*. Wav cdgBrowse.Flags = & H2 Or & H400 cdgBrowse.InitDir = GetSetting (App.EXEName, App.EXEName, Default Path) cdgBrowse.Fetting App.EXEName, App.EXEName, Default

Filename) cdgBrowse.ShowSave 'If the file exists, then it will be deleted

If Len (Dir $ (cdgBrowse.FileName))> 0 Then

K.Î11 cdgBrowse.FileName

Claims (1)

Claim Didactic model, characterized in that it consists mainly of an amplifier (A) and a preamplifier (PA) which are supplied by a voltage source (ST), preamplifier which takes the signal from the output of a pickup (P) , is then amplified by the amplifier (A), and the data is transmitted through a wireless module (MW) to a computer (PC) from where it is taken over and written to CD using a program in Visual Basic.