Well last year I picked up a new sealed Transwarp GS.. Before I open it I thought it would be kool to see what was inside before I open it:). xray pics below 🙂
Today the PCB layout was completed for the first version of the Stereo card to be used in the GS laptop project. I will be checking over the schematic this weekend and make some text layout changes to the PCB layout before sending it to be made next week. This is a 2 layer board in a 76mm by 76mm PCB.
I have introduced a ground plane to improve grounding and reduce interference etc
Some New Year Updates
*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.