…This circuit, with the components shown, uses less than 10mA. You can modify this circuit to your own needs by making small modifications. The above circuit diagram is set for…
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25 Metres Range, Short Wave AM Transmitter
Here the short wave AM Transmitter circuit design diagram. The circuit is quite simple and easy to build since it applies only a few electronic components. The primary feature of…
Notebook Anti Theft Protector
…circuit is operated by a 12V miniature battery applied in remote control devices. IC TLO71 (IC1) is utilized as a voltage comparator with a potential divider composed of R2 and…
Water Level Indicator with Single 7 Segment LED Display
…It is built around priority encoder IC 74HC147 (IC1), BCD-to-7-segment decoder IC CD4511 (IC2), 7-segment LED display LTS543 (DIS1) and a few discrete components. Due to high input impedance, IC1…
Bicycle Directional Lights
This is the electronic bicycle directional lights circuit that use inexpensive components and is a good substitute to many commercially available versions in the marketplace. This circuit works in an…
DIY Electronic Cardlock Security System
…to insert the card wrongly, it will not go completely inside the mechanism and the system will not be enabled. When card for any appliance (say appliance 1) is completely…
Two Tone Train Horn based NE556 Dual Timer
…The circuit diagram is in a “basic” design, you may try to modify this circuit, for example: use a low power audio amplifier and use a small horn speaker π…
100W RMS Audio Amplifier
…gain.) The 22 pf feedback capacitor provides lead compensation, and is taken from the output of the tranconductance stage rather than the output itself. In this way, the phase lag…
Electronic Motor Starter
…relay. When the relay energises, the motor turns on. This electronic motor starter circuit is already tested and available in PDF version. Download the circuit and explanation in PDF file:…
Mesa Boogie Dual Rectifier
…sample only, download the complete schematic diagram from the links provided in this post. This Mesa Boogie Dual Rectifier available to download in PDF document and separated image files. You…