It's really nice to receive pics of projects people have built out of our book "Junkbots". Here's one of the latest: the Pendulum by Christopher Pepe. Nice magnetic suspension mechanism! Read More...
Circuit: Lightstorm
Dave Hrynkiw
July 12, 2007
(PDF Version) GIF Link
Some of you may have found the LightStorm Pummers that Mark Tilden has made using some neat looking plastics. We've built our own variation of the circuit, which is a dark-activated, quad-bicore pseudo-random chaos generated, dual pummer circuit.
Parts required are:
Dark Turn on Circuit
- Solarcell (SB Part SC2433)
- 1F 2.5V (SB Part CP1.0F) capacitor
- 1 Germanium Diode (SB Part D2)
- 100k Trimpot (SB Part RT100k)
- 2n3904 transistor (SB Part TR3904)
- 2n3906 transistor (SB Part TR3906)
Pummer Circuit
- 74HCT240 (SB Part 74HCT240)
- 2 x 1000uF Capacitor (SB Part CP1000)
- 2 x UltraBright LEDs (SB Part UBLED-R)
- 2 x 100k Resistors (SB Part 100k)
- 2 x 22uF Capacitors (SB Part CP22)
- 4 x 0.22uF Capacitors (SB Part CP0.22uF)
- 2 x 2 MegaOhm Resistors (SB Part R2.0M)
Pummer Circuit
- 74HCT240 (SB Part 74HCT240)
- 8 x 2n3904 Transistors (SB Part TR3904)
- 8 x CP0.22µF Capacitors (SB Part CP0.22uF)
- 8 x 1k Resistors (SB Part R1k)
- 2.2 MegaOhm Resistor (SB Part R2.2M)
- 3 MegaOhm Resistor (SB Part R3M)
- 3.3 MegaOhm Resistor (SB Part R3.3M)
- 4.3 MegaOhm Resistor (SB Part R4.3M)
MORE POSTS
LANL Workshop Update
We've got confirmation from the Santa Fe Art Institute that they are indeed handling the registration. Contact Brandy at (505) 424 5050 for registration details, or email her at info@sfai.org. Remember, this will most likely be the last hurrah for the event on May 3-6, 2001, so come now, or never again! Read More...
New Gearmotor - the GM17
Hellooooo! I love getting new gearmotors to test. I get to break them apart, poke them, submit them to torture test - it's all great fun. My latest victim of inspection is our new GM17 HE Offset gearmotor. It uses a very power efficient 300-form factor motor to drive the 228:1 gearbox. It isn't a […]
BEP Application #4 - The BBPV
We've churned out another Bicore Experimenter's PCB project: The "Bare Bones PhotoVore". This is an elegant little circuit, which offers the functionality of a basic photovore (with tactiles) all on a very simple circuit. Ours is solar-powered by a Miller Solarengine, but if you wanted to build one with a battery, your parts count would […]
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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.