Greetings, ye fine fellow travelers of yon internet. This week you'll find that we have three new and completely unrelated items to show off: 17010 3-AA Battery Holder - This three-cell holder has 9V-style snap connectors, and can create 4.5V with Alkaline batteries. 17390 Tact Switch - A push-button style switch that's compact, inexpensive and […]
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
Maker Faire, Closed Monday, Skeleton Sta...
Ahoy! Avast! Listen up me hearties, because we have a few important things to cover before we meander on to our weekly dose of Cool Links. First off... Solarbotics will be closed on Monday, May 20th. We're not sure who this Victoria broad is or why she decided to give us a holiday named after […]
Farewell, Mr. McKee!
After 5 years of employment with Solarbotics Ltd., Grant McKee has submitted his letter of resignation to Solarbotics, effective August 16th 2005. Mr. McKee has been an invaluable resource at Solarbotics, but is off to hunker down and gather resources before making the leap to further advance his education. Although he will be greatly missed, […]
RC Brutusbot n' Communication Stuff
Help! It's getting colder outside and the trees are starting to shed all over everything. It's quite a mess. It's pretty, but a mess all the same. So we did what anyone would do in such circumstances - we made a small DIY tank platform wirelessly controllable, released a new breakout board, and put together […]
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!
Solarbotics, Ltd. is not responsible for misprints or errors on product prices or information. For more information, please see our Terms and Conditions.
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.