Touch switch using CD4011

Posted on Feb 7, 2014

A simple touch switch circuit using CD4011 is given here. The IC CD4011 is wires as a flip flop here. The 9, 13 pins of the IC works as the set and reset contacts respectively. CMOS ICs like 4011 require requires a very low current for controlling its gates. Since the pins 9 and 13 are connected to the positive via resistors R1 and R2, the logic ga

Touch switch using CD4011
Click here to download the full size of the above Circuit.

tes of the ICs will be in high state. When we touch through the points A, B the gates of the IC will be closed and the output becomes low. This switches ON the transistor Q1 and the relay gets activated. When we touch through the points C, D the gates again becomes high and switches the transistor OFF. This makes the relay OFF. Thus by touching through the contact points A, B and C, D the appliance connected through the relay can be switched On and OFF.

Leave Comment

characters left:

New Circuits



Popular Circuits

Home Security System with microcontroller
PIC hydro system controller
Bench Power Supply circuit
Touch Switch illuminates LED
build lithium ion battery
Schematics Stereo Parabolic Microphone
Tube preamp tone control
0-30 VDC Stabilized Power Supply with Current Control 0.002-3 A
1W FM Transmitter Circuit
Peak Detector Circuit
LED digital clock language timekeeping circuit
Electronic switching preamplifier