August 4, 2014 AT 12:00 pm

From the Forums: Turn off TVs as you ride around with this TV-B-Gone bike light mod

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Stephan Edel in Berlin shared a TV-B-Gone bike light mod in the Adafruit Forums!

Hi, I modded TV-B-Gone to fit into a small-ish bicycle tail light, and I would like to hear what you think about it, or even better for people to try it – I gave some to my friends, and they have been happily turning off TVs since.

Obviously, there was no room for the ISP connector, so if you want to program the ATTiny using e.g. the AVR ISP mkII, you will need a small adaptor an example of which I described here (that will also work for the ATMega 328 etc. as used in Arduino)….

The mod

The “Smart E-Line” brand of battery-powered bicycle tail lights (RL403R) make a good casing for the TV-B-Gone kit. They are inexpensive and come complete with batteries, a button, and a bike mount. All that had to be done was to reduce the size of the circuit board to about a third to fit the light and its connectors.

The new board is single-sided and, like the original, fitted with through-hole parts, which are easier to solder than SMD parts. IMHO the board is well suited for first attempts in etching your own circuits.

To save space, some elements were left out from the original kit. No new parts were added. Omitted were
the ICSP connector; not much of a problem as the MCU is socketed and can be taken out to be reprogrammed
the diagnostic LED; function checks can be done by looking through an electronic camera, which are sensible to infrared
the fourth IR LED – there was no space left. Still, three LEDs should give good range.
the push button and battery holder, which are parts of the bike light

Read more.

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