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Posts Tagged ‘mystery PCB’

ITead mystery PCB: High-power RGB LED driver

Thursday, January 12th, 2012

Schazamp received a few mystery PCBs from Itead’s open PCB service. He contacted the designer of the PCB and got more info about this board, as well as the schematic. It's a controller for driving two 3 watt RGB leds in series, you need 6 pin RGB leds for this,...

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Posted in PCBs | 2 Comments »

ITead mystery PCB: TFT digital picture frame by Erick Aubin

Saturday, December 31st, 2011

Arhi received a mystery PCB with his last ITead PCB order: TFT digital picture frame with in built Real-Time clock and thermometer Designed by: Erick Aubin I assume B1 is a big capacitor, something like 22000uF or similar (judging from the size), USB-BUB is some ft232 or similar usb 2...

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Posted in documentation | 5 Comments »

Recent Comments

  • Pekka Akselin: This is ridiculous!? :-) We are back at 256(!) byte EPROMs that needed multiple, a handful, of voltages to run! :-(
  • KH: Let's try a back-of-envelope calc balancing energies. From MCP1700 datasheet, there are graphs for a 200mA load step. Estimate the energy shortfall as 12uJ. Say...
  • Daniel: It's been a week and my comment is still awaiting moderation. Apparently the CIA doesn't want their involvement known?
  • KH: Agree, so okay, I guess he must have learned from somewhere. 100nF and 1000uF is so far apart, that was jarring; it's more magic incantation...
  • Max: I have a suspicion the hefty electrolytic cap might be some sort of cargo cult carry-over from other RF-based projects - for instance, I've seen...