Waveforms: Writing to Cassette

A project log for FA-32 recreation

DIY alternative to the cassette interface for CASIO PV-7 and MX-10 / 101

danjovicdanjovic 12/04/2021 at 00:350 Comments

The Microphone signal come from MSX as a square wave and it is attenuated and filtered down to  20mVpp.

The noise on the output signal is due to a combination of noisy probes and an oscilloscope reading signals at its maximum sensitivity. Tried 3 different probes to verify that.

It is worth to notice that this circuit should be properly shielded, otherwise the output signal can get distorted, so the cable that connects the MSX to the box must provide the shield connections.