Semiconductor relays
#semiconductor
#relay
#solid-state
#switching circuit
#power control
#electronics
#circuit design
#high voltage
#low voltage
#isolation
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Basic Transistor Circuits
This circuit is designed to drive a relay coil using a low power output, typically from an integrated circuit (IC) such as a 555 timer or a TTL/CMOS device. It facilitates the switching of high loads or loads requiring AC...
microcontroller 12V relay circuit converted to 5V relay under uC control
The BC547B transistor has a collector-base voltage (Vcbo) of 50V, a collector-emitter voltage (Vceo) of 45V, and an emitter-base voltage (Vebo) of 6V. In contrast, the BC548 transistor in the original circuit has a Vcbo of 30V, a Vceo of...
High Voltage Switching for Energy Recovery
This is a High Voltage switching device for driving coils and which have big impedance when it is switched off. It can be used in Back-EMF energy recovery tests, Newman coils electronic commutator. This device is driven by an opto-coupler...
Power Off Delay Relay circuits
The two circuits below illustrate opening a relay contact a short time after the ignition or light switch is turned off. The capacitor is charged and the relay is closed when the voltage at the diode anode rises to +12...
Controlling a relay with a digital logic level circuit
The schematic below illustrates four methods of controlling a relay with a digital logic signal. Figure A can be used in most cases where the relay coil requires 100 mA or less and the input current is 2 milliamps or...
Multi Switch Controlled Relay
A Multi Switch Controlled Relay circuit is utilized to manage home appliances, featuring a circuit diagram that outlines the application of a multi switch-controlled relay using a single integrated circuit (IC) for various control functions.
The Multi Switch Controlled Relay circuit...
Various Schematics and Diagrams
Energy storage capacitors in even the smallest disposable camera flash powered by a 1.5 V AA battery can be hazardous under certain conditions. Line-powered devices, regardless of size, may present additional risks due to high power at high voltage and...
Low Voltage to 30 kV Out
The circuit detailed in this document is designed to produce up to 30 kilovolts or more from a low-voltage DC source using a flyback transformer (LOPT) salvaged from a black-and-white or color television or computer monitor. With a typical 12...
Low Cost High Voltage Power Supply
This high voltage, low current power supply has been designed for various experiments in systems and synthetic biology. The schematic and board layout are provided below. The circuit can output up to +1,866 VDC at under 1 mA and can...