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FM Transmitters 2010-10-29
I have quite a few so I decided to post many FM transmitter schematics.
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[IMG]http://static.electro-tech-online.com/imgcache/10346-ps2_keyboard.jpg[/IMG] I recently wrote
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hello friends, i am trying to make a 3 Axis 3 axis cnc router. i want to control the 3 stepper
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Low pin-count microcontrollers like PIC12F series don't have enough I/O ports to directly drive a s
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This simple telephone switching system is designed by Dr. Mustafa Kemal PEKER for training purpose
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The circuit uses a 555 timer wired as an astable oscillator and powered by the emitter current of t
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I wrote up a Eagle tutorial for another user on this forum, but I thought, what the heck someone el
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This project uses a lead-acid battery to power some strings of LED’s at night for illumination of
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The circuit has been designed to simulate a canary “Harzer Roller”. It consists of six timer IC
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A variable DC power supply is one of the most important tools for an electronics hobbyist. Most of
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Here is a small power supply project that I would like to share with all the members of this forum.
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Using a single cable such as speaker wire or doorbell cable, this circuit can be remotely positione
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Audio Notch Filter 2010-07-06
At first glance this circuit looks fairly complex, but when broken down,can be divided into high pa
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This circuit is a simple two transistor (2N2222) FM transmitter. No license is required for this tr
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FM Transmitter (#1) 2010-07-06
This circuit is a simple two transistor (2N2222) FM transmitter. No license is required for this tr
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Night Buzzer 2010-07-06
If you want revenge that won’t kill someone, just make them go insane, have I got the thing for y
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The current draw for this tracker is 3.7mA, so the 1.5V button cell will last awhile. What the heck
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AM Radio Receiver 2010-07-06
Here's a very simple AM Radio circuit I've designed couple of years ago. Don't know whether anybody
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Strobe Light 2010-07-06
Strobe lights are widely used by disco lovers to create wonderful visual effects in disco halls and
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5 Zone Alarm System 2010-07-06
Each zone uses a normally closed contact. These can be micro switches or standard alarm contacts (u
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