- May 27, 2012
- Mobile Phone
Done, board is slightly wider now. Question is it necessary since the Arduino module has this cap already? I also added a reset header next to the cap.- I would add a 100nF decoupling cap for the Arduino
I think I added just to limit current from the PSU (not that i measured it). Can it be removed?- What's the reason for R9?
Have aligned my board to your circuit. Thanks.- Your inverter circuit could deliver more than 3.3V (depending on the inverter input resistance). I'm using a pullup to 3.3V. (see pic, signal inverted in software, no pulldown resistor in schematic)
Well spotted, I had Already Fixed it. Thanks- on your B2 PCB layout a trace from the power transistor to the PWM pin of Fan 3 header is missing?
Hmm. The only possibility without a major re-design would be to switch the 4 pin fan header to the right side, but as you can see space is limited, and the 4 pin header is much wider. Can you extend your cable, in the 20" model both top fan cables are not long enough. Thoughts ?-The fan 1 cable will not be long enough in a 17" model.
I am trying to find some room, should fit but would like to fix up some other things first.- A 3pin connector for a Servo (D0, 5V, GND) could be useful
Yes my relays arrived today from China, very small.- The new chime module is not yet wired. Relay looks good.
Yes, It can fit. I have chosen a 3386P package, second from left in picture on this page. http://www.robotroom.com/Trimpots.html- could a voltage divider (or pot) for the chime volume adjustment be useful?
Any concerns with this part?
What resistance value would be appropriate?
Does it go on the Chime or amp side of the decoupling capacitor C2?
I moved the driver transistor, protection diode, and resistor (Q10,R2,D6) to the left side of the board, very close to the 5V supply and relay coil. Better location, gives more space in middle of board, and now I have the polarity of the coil correct.
NOTE: The diagrams were removed See here for final diagrams http://www.tonymacx86.com/imac-mods/107859-kiwis-next-project-imac-g5-27.html#post985797