Not yet completed, just etched the board. Won't have time to stuff for a couple of days (work gets in the way).
- 12 IR leds equally spaced around a 1.25 diameter PCB
- powered by a small 2 cell lipo battery pack (7.2 - 8.4V source)
- single so-8 n-ch mosfet switches the cathode of all the LED's.
- each LED has its own dropping resistor off the battery supply coming in.
- sot89 sized 5v regulator for the MCU.
I kept the 8 pin dip MCU since I already had a tube of them.
Once I get it built I need to figure out how to install it in a baseball cap without looking too dorky.
TV-B-Gone 360
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They're radially installed around the perimeter of the PCB.caladan wrote:How do you connect those LEDs?
It could be more efficient to use switching regulator... or separate battery.
Don't need a switcher for the MCU, the current draw is so low that a linear reg. is fine, plus it's much smaller this way. The LED's are powered straight off the incoming supply, with a dropping resistor off each LED.
Please be positive and constructive with your questions and comments.