*Drew ][ TDX Card*
Now have some sample back plates and 15 PCBs have turned up :-)
*Portable GS Stereo Card*
Have moved away from the LM386 pwr amps and now using a single dual power amp TDA2822M. This was primarily to keep component count down as the dual pwr amps are actually more expensive.
I am also testing with the DS1802 dual digital pot (this provides a single IC with mute function, but doesn't remember the wiper position unike the DS1669 though its more designed for volume control). I would say I am almost there for a completed circuit and just ironing out some minor issues to avoid instability in the circuit.
It is looking like the prototype board for the GS laptop will consist of:-
- MC14052B - DeMux
- TL082 - Op Amp
- DS1669 x 2 - Digital Pots
- TDA2822 - Dual Pwr Amp
The GS Laptop project have tight timescales so at the moment focus is on this rather than the Drew ][ TDX card...
Michael Mahon has been a real mentor for this project and massive thanks goes out to him.
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