I have a typical 555 timer monostable circuit soldered into a PCB board. A relay is run by the output of the IC (pin 3) after amplifying through a transistor SL100.
IC is set to be triggered by an external push switch.
The problem is that--> sometimes when I use The relay (to pass some Currents through it) the monostable IC is triggered (false). It is also sometimes triggered when a tube light nearby is switched on/off.
It don't always happed, but then also, this circuit has become useless to me, since I need it to be highly reliable.
Where am I getting wrong.
(the circuit I am using is highly popular monostable mode with a push button form ground to pin 2 ; output pin 3 is connected to the base of SL100 transistor which drives the relay)
IC is set to be triggered by an external push switch.
The problem is that--> sometimes when I use The relay (to pass some Currents through it) the monostable IC is triggered (false). It is also sometimes triggered when a tube light nearby is switched on/off.
It don't always happed, but then also, this circuit has become useless to me, since I need it to be highly reliable.
Where am I getting wrong.
(the circuit I am using is highly popular monostable mode with a push button form ground to pin 2 ; output pin 3 is connected to the base of SL100 transistor which drives the relay)