What's the biggest event for Solarbotics in the spring? Calgary Comic Expo on April 27-30! This year we are going to be there as part of the DIY Island (booth 110) at BMO Centre, Calgary Stampede Park. DIY Island is a booth space shared between Solarbotics, Repair Oasis, Protospace and MakerFaire Calgary. Solarbotics will be […]
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
New Product: 50 Meter GroovyNoodle Wire ...
GroovyNoodle wire. Some is good; LOTS is better. We absolutely love our GroovyNoodle wire, with its super flexibility and silicone-jacket insulation in 7.5M "casual use" spools. For more ambitious projects that need more length, we now have our GroovyNoodle in value-priced 50 meter spools! It's more of our favorite 24AWG wire with a whopping 40 […]
Project: Experiments in Watermelon Filam...
It takes a while to get to know all the quirks of your 3D printer and filament well. We thought we'd add to the knowledge base and share what we've learned about using the eSun 1.75mm PLA filament in Glass Watermelon Red on our Kossel Pro delta style 3D printer.
Friday New Product - Grove and RGB LED B...
Grove - 2-Coil Latching Relay $12.84 The Grove latching relays are interesting because they take a pulse to toggle their state, which it maintains even after a power cycle. GrovePi Starter Kit for Raspberry Pi $116.87 Carrying a GrovePi+ board together with 12 carefully selected Grove sensors with 10 pieces cables, this starter kit gets […]
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.