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220V AC Lamp Toggle Switch Circuit
220V AC Lamp Toggle Switch Circuit
September 30, 2010

Due to the low current drawing, the circuit can be supplied from 230Vac mains without a transformer. Supply voltage is reduced to 12Vdc by means of C1 reactance, a two diode rectifier cell D1 &... [more]


circuit from:http://www.extremecircuits.net/2009/07/220v-ac-lamp-toggle-switch.html

Dual Relay Driver Board Circuit Schematic
Dual Relay Driver Board Circuit Schematic
September 30, 2010

A simple and convenient way to interface 2 relays for switching application in your project. This relay driver boosts the input impedance with a regular BC547 NPN transistor (or equivalent). Very common driver. It can... [more]


circuit from:http://www.extremecircuits.net/2010/01/dual-relay-driver-board-circuit.html

Electronic Toggle Switch No1
Electronic Toggle Switch No1
August 8, 2010

This simple circuit will energize and de-energize a relay at the push of a button. Pushing the button once - will energize the relay. And pushing it a second time - will de-energize the relay.... [more]

Electronic Selector for 8 Sources
Electronic Selector for 8 Sources
August 8, 2010

The Elect. Sel. 8 is a simple circuit, with a choice of 8 sources of any sort ,of 8 independent switches. Each switch corresponding with a relay for example the switch S1 activates the RL1... [more]

Electronic Selector for 10 sources with Display-Relay Drive
Electronic Selector for 10 sources with Display-Relay Drive
August 8, 2010

This is a circuit for alternative sources selection. It combines mechanical selection using a rotating switch S1, the electronic drive of the relays RL 1-10 and also the optical indication of the selection by the... [more]

High Current MOSFET Toggle Switch with Debounced Push Button.
High Current MOSFET Toggle Switch with Debounced Push Button.
August 8, 2010

It is useful where the load needs to be switched on from one location and switched off from another. Any number of momentary (N/O) switches or push buttons can be connected in parallel. [more]

Relay Toggle Circuit Using a 555 Timer
Relay Toggle Circuit Using a 555 Timer
August 8, 2010

This 555 timer circuit toggles a relay when a button is pressed. Pins 2 and 6, the threshold and trigger inputs, are held at 1/2 the supply voltage by the two 10K resistors. When the... [more]

Relay Toggle Circuit Using a 556 Timer
Relay Toggle Circuit Using a 556 Timer
August 8, 2010

This toggle circuit operates by using a couple 555 timers wired as inverters. Pins 2 and 6 are the threshold and trigger inputs to the first timer and pin 5 is the output. The output... [more]

Single Transistor Relay Toggle Circuit
Single Transistor Relay Toggle Circuit
August 8, 2010

The circuit requires a double pole, double throw relay in conjunction with a single transistor to allow toggling the relay with a momentary push button. One set of relay contacts is used to control the... [more]

Single MOSFET Relay Toggle Circuit
Single MOSFET Relay Toggle Circuit
August 8, 2010

In operation, when the relay is deactivated, the 100uF capacitor will charge to 6 volts. When the button is pressed, the capacitor will apply 6 volts to the MOSFET gate turning it on. The capacitor... [more]



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