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Learn by doing! Fantastic. I bought a couple of partial Guitar Hero drumkits to do the same with. Building it entirely from scratch is impressive!
Just about any photocell should work. Just test the resistance with your foot up and your foot down. Then select a resistor halfway between, on the log scale.To clarify: On the logarithmic scale, halfway between 1k and 100k is 10k. Halfway between 1k and 10k is 3.3k. Halfway between 1k and 1M is 33k. I'm using standard resistor values.http://polymer.bu.edu/ogaf/image/fig22.gif
Homemade Electronic Drum kit with Arduino Mega2560
The Magbot pendulum
No need for the AVR from an Arduino, then. You can program the ESP8266 directly.
You can buy the AVR chip with the bootloader preprogrammed by itself and use the Arduino board to program it. Or the AVR plus a USB to TTL serial board.
A-35 Doomsday device
Easy Joule Thief Soldering Project
Never put electrolytic caps that close to heat producing components.And I think you meant 10uF. Actually, 0.1uF is usually sufficient.
It is a bad idea to put really large capacitors on the output side of a linear regulator. High charging currents will flow, and it may actually make the regulator unstable.Something more like a 0.1uF ceramic is needed, it has a lower impedance at higher frequencies than an electrolytic capacitor.
Do you mean 1uF? Lower case "m" is milli, this calls for microfarads.
Tytower is correct. Too much capacitance on the output of a linear regulator causes high initial charge current, and can cause instability.
Minimalistic Led Clock
Graphite is a great idea. Corrosion will still happen, but the corrosion is simply CO2 and won't coat the electrodes. And it won't poison the soil with metals.
Galvanized steel is only used by hobbyists, as far as I can tell.It is coated with zinc, which is to act like the zinc sacrificial anode on a boat. So when it gets wet, galvanic corrosion eats away the zinc before rusting the iron. But galvanized metal is not meant to be placed in constant contact with moisture or dirt, the zinc will get eaten away very quickly, then the iron rusts.And the zinc oxide is a bit toxic.
Build a Better Stirling Engine
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Modification of the Pantum 2502W for Direct Laser Printing of Printer Circuit Boards
All You Need to Know About LEDs
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Steampunked mp3-player "Junophon"
Heatless (cold) Toner Transfer for PCB making
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