Touch on-off switch


Posted on Aug 18, 2012

A Touch On/Off Switch is desired, this circuit fills the bill. Two sensitive gate SCRs are interconnected, so that when one of the devices is turned on, the other (if on) is forced off. That toggling effect gives an on/off circuit condition for each of the LEDs in the SCR-anode circuits. To turn LED1 on and LED2 off, simply touch the `A'' terminal, and to turn LED1 off and LED2 on, the `B` pick-up must be touched. It is possible to simultaneously touch both terminals, causing both SCRs to turn on together.


Touch on-off switch
Click here to download the full size of the above Circuit.

To reset the circuit to the normal one-on/one-off condition, momentarily interrupt the circuit's dc power source. Additional circuitry can be connected to the anode circuit of either or both SCRs to be controlled by the on/off function of the touch switch.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Brick-wall lowpass audio filter needs no tuning
TDA1554 / 22W Stereo Amplifier
AVR LCD Microcontrolled Oscilloscope
Audio Oscillator schematic
2 watt Stereo audio amplifier
Photo-Event Timer
transistors Having difficulties using a darlington (BD681) to drive a 12V fan from an Arduino
Combinatorial and Sequential Circuits
Space Horticulture Circuit
SUN TRACKER HITEC SERVO ACTUATOR CONTROLLING ALIGNMENT SOLAR WING PANELS
A read-only phase sequence indicator circuit



Top