This week: Blizzards. Ice. Snow drifts. Rather sunny and warm. Wait, what? Yup, we've seen it all this week folks. All that's left is for delicious pastries to start falling from the skies, and we can check off the last item on our home-made "meteorological phenomena" list. And boy, you have no idea how long […]
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
Friday New Product: Toolbag, Digital San...
Today we have some fun stuff to play with, mainly Sandbox and Trinket, and their accessories: Sparkfun Tool Bag Kit $34.95 A portable tool bag that includes everything to get you started. Sparkfun Digital Sandbox $74.95 The Digital Sandbox makes learning how to program microcontrollers a snap! Walk through 13 unique and interesting experiments with […]
Solarbotics at the MAKEr Faire!
We're gonna be at the MAKEr Faire this May! Come by our booth where we'll be populating our MSE-style solar cells and attaching them to junk salvaged from Michael Shiloh's Play Day Area!
New Product Friday: Cables, Adapters, Ju...
Well, I'm officially out of words, and again reverting to non-verbal expression. I already tried to interpretively dance the new product post before. That leaves me completely out of options here. So how about I sleep interpretively? Or breathe... Now, that's just plain weird. Better I sleepwalk then: 4-conductor, 20AWG ribbon cable (Blue, Green, Yellow, […]
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.