1. 555 - The Clock (too slow because of EC)
2. Up/Down - D-flip-flop style implmentation
3. Sine Source - Input signal
4. Output of the Up/Down is the "1 bit Digital data".
5. Low pass filter - Form the sine wave from the "1 bit digital data"
6. Opamp 1 - Buffer with AC pass
7. Opamp 2 - Voltage amplifier
Thats it. maybe current amp + speaker for testing purposes. 1 through 4 complete the ADC and 5 through 7 complete the DAC.
Yes i know it looks like crap on EC because the clock is too slow. A 50kHz or 100kHz clock would make a beautiful sine wave.
