Recent questions tagged ic555

Description : Draw & explain touch plate switch using IC555.

Last Answer : It is construct form monostable multivibrator , when metal plates touch by finger then voltage at pin number 2 goes to below 1/3 Vcc then output of lower comparator becomes high hence flip flop set and ... then output of timer goes low and it low till up to the metal plates touch by finger .

Description : State functions of the following pins of IC555.

Last Answer : 1) Control: - The dc Voltage at this pin is 2/3 Vcc. An external voltage applied to this changes threshold as well as trigger voltage to obtain pulse width modulated output.  2) Trigger: - The ... greater than 2/3 Vcc . When the voltage goes below 1/3 Vcc, output of the timer goes high.