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Using Relays – Circuit Schematic
Using Relays
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THE TESLA SWITCH – Circuit Schematic
THE TESLA SWITCH
We used as a starting point for our experiments, the switching device John Bedini had built for the Tesls Symposium. Our goal was to upgrade this switching devi...
Soft Start For Switching Power Supply – Circuit Schematic
Soft Start For Switching Power Supply
Switching power supply whose output voltage is appreciably lower than its input voltage has an interesting property: the current drawn by it is smaller than its...
Relay Coil Energy Saver – Circuit Schematic
Relay Coil Energy Saver
Some relays will become warm if they remain energized for some time. The circuit shown here will actuate the relay as before but then reduce the hold` current t...
Reducing Relay Power Consumption – Circuit Schematic
Reducing Relay Power Consumption
Relays are often used as electrically controlled switches. Unlike transistors, their switch contacts are electrically isolated from the control input. On the ot...
Mains Slave Switcher – Circuit Schematic
Mains Slave Switcher
There are many situations where two or more pieces of equipment are used together and to avoid having to switch each item on separately or risk the possibility ...
Mains Slave Switcher II – Circuit Schematic
Mains Slave Switcher II
As a guide, a one-inch reed switch with 40 turns reliably switched on with the current flowing through a 150-watt lamp (approx. 625 mA) but larger reeds may req...
The Gentle Touch – Circuit Schematic
The Gentle Touch
Consumer appliances these days hardly ever have a proper mains switch. Instead, appliances are turned on and off at the touch of a button on the remote control,...
Relay Driver Circuit – Circuit Schematic
Relay Driver Circuit
In this project, we will build a relay driver for both DC and AC relays. Since DC and AC voltages operate differently, to build relay drivers for them requires ...
ISL6740A Flexible Double-Ended Voltage-Mode PWM Controller with Voltage Feed Forward – Circuit Schematic
ISL6740A Flexible Double-Ended Voltage-Mode PWM Controller with Voltage Feed Forward
The ISL6740A is an enhanced ISL6740 PWM controller featuring built-in voltage feed forward functionality. It is pin and feature compatible with the ISL6740 doub...
ISL8107 Single-Phase Pulse-Width Modulation (PWM) Controller with Wide (9V-75V) V – Circuit Schematic
ISL8107 Single-Phase Pulse-Width Modulation (PWM) Controller with Wide (9V-75V) V
The ISL8107 is a single phase, non-synchronous buck controller with an integrated high-side MOSFET driver. The controller operates from 9V to 75V input voltage ...
Voltage Controlled Switch – Circuit Schematic
Voltage Controlled Switch
This is a little circuit that i designed that could be used for achargingcontroller or voltage limiter. Its very useful if you are thinking of maki. In the asse...
Small Triac Switch – Circuit Schematic
Small Triac Switch
In order to switch some floodlights by my Arduino, the small switch circuits I built around a 39mf22 were just not man enough to handle the current ne.....
Pulse Operation of DC Solenoids – Circuit Schematic
Pulse Operation of DC Solenoids
With pulse operation, the solenoid is energized momentarily with five to six times its rated voltage, then held in with less than half of its rated voltage. App...
IN4148 Silicon Epitaxial Planar Switching DIODE – Circuit Schematic
IN4148 Silicon Epitaxial Planar Switching DIODE
This simple diode modulator delivers excellent results when used for high percentage modulation at low signal levels. Constants are shown for a carrier frequenc...
Dual Relay Driver Board Circuit – Circuit Schematic
Dual Relay Driver Board Circuit
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 N...
High Current MOSFET Toggle Switch with Debounced Push Button. circuit – Circuit Schematic
High Current MOSFET Toggle Switch with Debounced Push Button. circuit
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 ...
Dual Relay Driver Board – Circuit Schematic
Dual Relay Driver Board
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Semiconductor relays – Circuit Schematic
Semiconductor relays
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Relay Driver – Circuit Schematic
Relay Driver
Relays have been around for a long time and though often now replaced with solid state switches, they have unique properties that make them more robust tha.....