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Posts Tagged ‘PIC18F’

USB Power Monitor

Thursday, January 17th, 2013

The December 2012 issue of the Australian electronics magazine Silicon Chip features the USB Power Monitor. It uses a PIC18F45K80 to monitor the power consumption of a USB device. The board acts as a bridge between the host and the device with a USB A male on one side, and...

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Posted in sensors, USB | 4 Comments »

Programmable timer switch

Thursday, December 13th, 2012

Need a switch that turns on and off at set times? Here is a project by Victor that does exactly that. It's PIC18F4550 based and uses a DS1307 real time clock chip to keep time. A small 12 volt relay acts as the switch. This project, like others before, has...

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Posted in project logs | 3 Comments »

8×16 ping-pong ball LED matrix display

Thursday, June 7th, 2012

Exapod built a 8x16 ping-pong ball LED matrix display. The ping-pong balls are used as diffusers for green LEDs. Two MAX7219 8bit serial LED drivers control the lights. A PIC18F2553 drives the MAX chips with text received over a Bluetooth module. I finally finished my 8x16 ping pong ball matrix...

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Posted in PIC, project logs | 10 Comments »

Open source USB stack for PIC18F and PIC24F updated

Thursday, January 26th, 2012

JTR released a major updated to the open source USB stack that's been brewing in the forum. It's been designed to work with a generic echo demo, the Bus Pirate v4, the USB IR toy, the LCD Backpack, the Locgic Shrimp, and the Logic Sniffer. So far only the CDC...

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Posted in open source, USB | 3 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...