Universal Power Controller
Relay K1 has a low-impedance coil and K2 has a high-impedance coil. When a sensor opens, current is routed throu...
Power Mosfet Switch
This solid-state switch senses and interrupts an overcurrent condition within 2 /is. II allows the circuit to float. IC...
5V Supply High-Side Switcher
Requiring only 10uA of quiescent current, the circuit of (Fig. 62-1 (a)) produces only 0.1ohm ON-resis-tance....
Scr Capacitor Turn-Off Circuit
After the SCR turns on, CI charges up to almost the full supply voltage via R3 and the anode of the SCR. Whe...
Low-Level Power Fet Driver Method
This circuit operates from a 16- to 50-V supply. Adding the buffer circuit (within the dashed lines) offe...
Scr Circuit With Self-Interrupting Load
A self-interrupting device connected to a voltage source functions as a switch that repeatedly open...
Self-oscillating-switching-converter
Regulation is provided by taking the rectified output of the sense winding and applying it as a bias to the base of Q2 via zener Dl. The collector of Q2 then r...
High-performance-video-switch
This figure shows a one-of-two switch with a sunnning amplifier. The video source"s line can be terminated either externally or internally to switch RO. With t...
Automatic-video-switch
Tum on a game, computer, videodisc player, or whatever, and its output takes priority over the antenna-derived signal-the antenna is disconnected and the alter...
General-purpose-video-switch
The circuit shown provides 40-dB isolation at 6 MHz and is good ...
Touch-switch
This touch-actuated switch stays on as long as you keep your finger on the touch plate. Rl sets the input impedance to a high 22 MO. Ql picks up stray signals ...
Touch-switch
When the plate is touched, the gate input becomes low, changing the state of the latch. ...
Line-hum-touch-switch
The monostable period is set for about 1 second, as is the usual case. The induced line hum comes through C2, providing a continuous string of trigger pulses. ...
Touch-on-off-electronic-switch
Transistors Ql and Q2 control latch Q3 and Q4 to switch on the lamp. ...
Two-terminal-touch-switch
This circuit requires the bridging of two circuits to activate the electronic switch. That circuit does not require a 60-Hz field to operate and can be batter...
Zero-point-switching-temperature-control
This modulated triac zero-point switching circuit controls heater loads operating from 115 Vac. Circuit operation is best described by splitting the circuit in...
One-mospower-fet-analog-switch
Using four diode in an array allows using only one MOSPOWER transistor for analog switching. The current flow is controlled by keeping the source-base connec...
Scr-replacing-latching-switch
This circuit provides the tum-on characteristics of an SCR, but turns off with ease. The switch is comprised of three transistors with descending current rat...
Hold-current-limiter
In many applications, a solenoid driver must first briefly supply a large amount of pull-in cnrrent, which quickly actuates the solenoid. Thereafter, the drive...
12V-latch
This circuit controls a solenoid by the operation of a single push-button switch. The circuit will supply loads of over 1 A and can be operated up to a maximum...