Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
fm bug detector
check out the circuit at:
hptt://www.zen22142.zen.co.uk/Circuits/rf/bugdetector.htm
You could add a transistor driver to the circuit, and use a small pulsar vibrator from a cell phone for the vibration you want.
If your needing to remove dmaged screws from time to time, check out an auto restoration web site called 'EASTWOODS'. they have some very nice LEFT-HANDED drills that will remove most scres while drilling a hole in the center of the head. Used this set up many time in the field and it works...
remote alarm systems for rural locations
a simple but effective system uses a pair of wire running along your fence, one system for each side. The system is simple, the bottom wire (about a foot below the top wire), is hooked to a simple oscillator in free running mode. The second wire has a...
Project idea
An interesting project might be that of an electronic control system that monitors the position of a weight suspended in a large tube (to block any wind effect) on an elastic cord. The system could monitor the position of the weight from the bottom and top with a transmitting led...
I am in the midsts of building a small solar oven (third one this year), and I'm looking for a way to turn the oven on a turntable to keep it pointed at the sun. This means someway to either turn the trurntable about 15 degrees an hour, or to track the sun full time. Any ideas? (oven weighs...
Lewis,
Your making this thing too hard! a simple lever will allow you press the BBQ button easily, and the spark it makes is very dependable. Make sure the spark contacts are clean, and the peizo unit works very well. (used on on a spud gun for nearly a year, and never had a failure. I even...
going to build a small battery powered amp for a handicapped buddy, into the surface of the guitar bridge frame,(low power for headphones) (He like to sit and play, but it intrudes on others. He wants its small enough that we can fit to the guitar and leave it there. will use stereo headphones...
college project
As a thought, what about a beer ID unit. A light and sensor to check the light transmission of the beer to detect mild pales from dark lagers, and calibrated for each step in between and so forth. Add in a probe to test for conduction, a thermister to check temp. (is it right...
Submarine project
Have you considered using simple acoutic signalling through the water? Easy to make hydrophones would allow long-distance comm link between your sub and the surface. Modulated control signals on a audio signal are easy to do, and give you full control of your model in he...
I build V-8 powered trikes as a hobby,(obsession my wife says) , and one of the first units I had was for a trike built around a Harley. I used a hall sensor at the neutral position to sense the shift lever displacement, (missing event detection), and a hall sensor above and below the normal at...
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