Category Archives: useful

useful circuits

Micro Fm transmitter


Micro FM Radio Transmitter As you already know, the fm radio transmitter may be used for many purposes like transmitting your pirate radio signals(also known as ‘ghost signals’ or ‘ghost waves’) throughout the air or for spying (eg.listening to one’s … Continue reading

Posted in DIY-electronics, Radio(RF, Tech news, useful | Tagged , , , , | 7 Comments

Simplest FM Transmitter


Simplest Fm Transmitter! This is the simplest fm transmitter circuit you can ever find on internet,because so many “simple transmitters” (they call it simple but many of them don’t work!) on internet will not work as those circuits are designed … Continue reading

Posted in DIY-electronics, Radio(RF, useful | 41 Comments

IR(infrared) transmitter tester(New version)


IR(infrared) transmitter tester V2.0 The first version of this circuit can find Here. This new version is perfect because it includes a buzzer to produce a “beep” sound and an LED flash when you point and press a

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Home made enclosures(cases)


you can make your own enclosures(case)for your projects Have you ever thought of making enclosures(cases) yourselves for your finished (circuits) projects? I did! and finally i found a solution to make my own enclosures!,

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Continuity tester


Simple continuity tester this circuit is a countinuity tester, it could be used to test continuity of a wire or any kinds of conductors,

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Automatic Lamp


Automatic lamp This circuit will turn on an AC Bulb when the sun sets, the working of the circuit is simple and the heart of this circuit is an LDR(Light Dependent Resistor) that is wired as a light sensor thus … Continue reading

Posted in high voltage, useful | Tagged , , | 17 Comments

USB powered LED lamp


USB powered LED Lamp Since we can use the USB port of the computer to power many useful circuits, here is a simple USB LAMP circuit to power some white LEDs,

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