optocoupler
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Oscillators Circuit Diagrams
Simple Digital Signal Inverter Project Schematic Circuit Diagram
There are times when one needs to take an digital signal and create the inverse of this signal. Doing this…
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Battery Charger
LAMP BURNING WHEN PHONE CALLS MOC3020 BT137 Schematic Circuit Diagram
When the circuit in the illustration is connected to the telephone line, the lamp is given light by any incoming…
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Remote Circuit Diagrams
Remote Control for Network Devices Schematic Circuit Diagram
Many devices connected to a local area network (LAN) are left on continuously, even when they are not needed, including…
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Telephone Related
Phone Ring Repeater Schematic Circuit Diagram
Even though cordless phones have invaded our homes and offices, you don’t always have them at hand, and as their…
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LCD-LED Display
Multicolour HD LED Schematic Circuit Diagram
Most PC enclosures provide only a single LED to indicate hard disk access, with the LED being connected to the…
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LCD-LED Display
Dimmer with a MOSFET Schematic Circuit Diagram
This circuit shows that dimmers intended for use at mains voltage do not always have to contain a triac. Here,…
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LCD-LED Display
Telephone Watchdog Schematic Circuit Diagram
This simple circuit will tell you, by sounding a buzzer and flashing a LED, that a telephone line is in…
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pinouts
4n35 Pinout Schematic Circuit Diagram
DataSheet: You can download in PDF format From Below Button; [button align=’center’ target=’_blan’ outer_border_color=’darksalmon’ link=’https://www.engineersgarage.com/sites/default/files/4N35.pdf’]PDF Datasheet[/button] 4N35 is an optocoupler integrated circuit in…
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Power Supplies
RS-232 Level Shifter with Isolation Schematic Circuit Diagram
This circuit converts between the TTL voltage levels on a UART to the correct levels for an RS-232 interface, with…
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Zener Diode
8 Channel D/I Card for RS232 Schematic Circuit Diagram
The author is a student at the Electronics Department, Technological Educational Institute of Piraeus, Greece. This project is a card…
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