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To start with I must appreciate acknowledge and thank ‘Christian Zeitnitz’ for the fantastic Sound-card Oscilloscope & signal generator software avail...
Waveform before correction The 555 Timer IC when operated as an astable oscillator from 5V provides a square wave of 0-5V and the waveform at the tim...
A 3V p-p 1kHz sine wave is fed through a silicon diode to a resistive load. The first figure shows that the sin wave is centered around zero as it h...
Circuit Diagram, Description, Front panel & BOM IC 747 U1 forms the input interface to the PC sound-card. The operational amplifiers are in the non-...
The .jpg images give the 1:1 PCB layout in A4 size suitable for fabrication using the toner transfer method. The TOP layer is given mirrored and the ...
The images give in sequence: 1. The Bare PCB TOP 2. Bare PCB Bottom 3. PCB with IC bases and resistors 4. PCB with all components populated. No...
I had an old plastic container to which an aluminum bottom plate has been added. I planned the positioning of the front panel connectors and switches...
Interconnecting wire is soldered to the board with extra length so that the board can be coated with lacquer before assembly. The front panel layout ...
The sound card line input and speaker out are wired to the 9Pin D-Connector using 3-mm stereo jacks from old sets of earphones. Three wires are added ...
See the interface in action with the input clips connected to the IC 555 timer circuit which is on a breadboard. The terminal layout and DIP switch g...
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