DAVE'S COMBO C2a VERSION BUILD PROGRESS
I thought it was about time I sent you a few pics of my progress with the C2aa PCB so far. I have Timer, Audio Amp, DSP, Codec, TrxAVR, DDS Filter, Matrix and PCA9555 loaded and operational. As you can see in the pics, I am using TftA with a touch screen, a bunch of encoders and the 18 button keypad on a temporary dummy panel to control and test each section as I build it.
So far I have not encountered any problems, everything has worked fine right from initial power on. Even the "reversed" diode in the RTC Charger was OK. The SOT-23 Zener diodes I have fit the footprint the correct way round!! Obviously there is more than one pinout type for these SOT-23 Zeners and mine are different to yours! Mine are marked 'Z2p' and are 5.1 Volt from Farnell about 5 years ago.
Next step is the DDS and Reference Oscillator. I'm waiting for a Vectron 245Mhz Oscillator to arrive. I want to have a play around with the Vectron before I decide on building the Butler or using the Vectron unit. I am planning to use an ERA-1SM in the DDS amp at this stage as well.
Had a heap of fun building so far, and there's still so much more to do.
CLICK PICTURES FOR LARGER SIZE.