The following instructions detail how to build a simple pummer using a BC2 (Bicore) BEP (Bicore Experimenter PCB). A pummer is a solar powered self activating LED flasher. The difference between a pummer and a BLFNAR (blinky light for no apparent reason) is that a pummer has a soft turn off, which means that it turns on fast, but slowly fades away.
Cool project
Dave Hrynkiw
January 12, 2003
Neil Sandstrom from the BEAM mailing list recently posted a notice about his "ShokHead" circuit built from our tutorial. What makes this project a bit different is that he mounted it on a VPM motor, so it's all self-contained. Here's what he says about it:
Just finished!!! Check it out it is really small!! http://groups.yahoo.com/group/beam/files/Psyclesam/ Uses all smd parts except Main Cap and PDs. Parts 1 x SB VPM vibrating disk motor 2 x SFH203PFA Photodiodes 1 x 74AC240 (SOIC) 2 x .22uF 16 Volt smd cap Miller SE... 1 x Panasonic BP2422 Solar Cell 1 x MN1382-J (smd) 1 x ZN2106G (SOT223) 1 x SB Small 1000uf cap 1 x TMMBAT42 (smd schottky diode) 1 x .22uF 16 Volt smd cap It turns a small amount but it does function well. Maybe a bigger cap like 3300uF in the next one. I temporarily gave up on Fled and Fred heads and opted for the very low part count and easy freeformability of the Solarbotics ShokPhoto Head Circuit. https://www.solarbotics.com/beam/circuits.asp Thanks SB!!!
He's also posted links to the videos of it here.
Due to bandwidth constrictions on his present server, we're mirroring the large video file here.
Nice job, Neil!
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Warning: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Please visit www.P65Warnings.ca.gov for more information. This item was manufactured prior to August 31, 2018.