Here at Solarbotics, we like to eat well. So, unfortunately after leaving a forgotten sausage roll in the microwave for several days we must search for a means of disposal and/or obvious prank to pull. Our immediate reaction was to place the rather stale pastry in the mouth of our office chimp, Herb. But now […]
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
Diodes, Trimpots
Happy October everyone! The leaves are falling and there's that crisp scent of winter lurking in the air. Ah, it sure is beautiful! And you know what else is beautiful? Diodes and trimpots, of course. Check out these gorgeous new components: 3.4V Zener Diode 5.1V Zener Diode 1k Single-Turn Trimpot w/ Knob 10k Single-Turn Trimpot […]
Canada Post Web Services Interruption
Due to scheduled maintenance by Canada Post on their Shipping and Tracking Web Services page we will be unable to provide shipping estimates between 7pm MDT on Saturday, June 11 and 12am MDT on Sunday, June 12. We apologize for any inconvenience this may cause.
New Catalog!
We've just printed off our latest catalog, and if you've ordered from us in the last year, or asked for one, expect a copy in the mail shortly! Or if you can't wait, download a copy in PDF format now (1.9Mb)!
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.