When it rains, it pours! We're addition to the IT position search (some good candidates BTW, thanks very much), we're now also looking for somebody to slide in behind the purchaser desk. Here's what the job entails: Watch stock levels (physical and in Quickbooks, because bits can't always be trusted over bytes), and reorder necessary […]
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
Why no new blogs? Huh? HUH?!?
Sorry. It's been a feverish last 9 months since taking the bull by the horns and taking over development of the NEW Solarbotics website. It's coming along, and will be ready VERY soon. Because of this, we've been concentrating on moving and vetting the new content, which is sort of like new content (but not […]
GM15s back in stock!
Sorry about the delay in making these available. These tiny 25:1 pager-sized gear motors are difficult to get built. BUT, we finally have more GM15 gearmotors in stock!
New Motor!
We've been very fortunate to be offered a limited supply of the amazing Portescap MU915L gear motor. Sound familiar? They should - they're the motivators for the legendary "Walkman" by Mark Tilden. We don't have a huge number of these, so if you're interested, order soon! (Limit 5 per customer)
Solarbotics has been operating for more than 25 years, bringing electronics know-how and supplies to both the electronics professional and hobbyist. We'll be happy to help you too!
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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.