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

December 13, 2010
Useless (Xmas) Machines!

We're teaming up with Brett Coulthard of Saskview.com to get their version of the Useless Machine put together as a parts bundle. We just finished it Friday night, and quick-posted tweets & a few photos of it, and are shipping today! What comes in the bundle? Pretty much everything you need to successfully build a […]

October 22, 2002
New BEP Application

Grant McKee has been working hard using BEPs in a good many applications around the office, so we've got him to put together a simple application of the BEP - the Pummer nocturnal Strobe. We'll be posting other BEP applications under the 'Special Projects' gallery, so check back once in a while!

January 25, 2001
We want Your Input!!!

We are working on fixing the bugs in the website, along with a number of other improvements. Some of you may already know that we are rewriting the ordering portion, making processing your BEAM needs that much easier. It is approaching it's release very quickly, we are just doing the final testing now! So give […]

December 19, 2016
The Solarbotics Repairacord™ Electroni...

Everyone is familiar with paracord bracelets - the cleverly woven wearable survival device that instantly unravels into many meters of useful and super strong nylon cord in case of necessity. These are useful for outdoorsy types, but what if you are an indoorsy type with a lot of electronic emergencies? Or a geek in need […]

Solarbotics Ltd Logo
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.