Position: Index > 555 Circuit >

555 firing control circuit

2015-02-03 04:18  
Declaration:We aim to transmit more information by carrying articles . We will delete it soon, if we are involved in the problems of article content ,copyright or other problems.


555 firing control circuit
As shown in the figure 11-26, the firing circuit is composed of a double time base integrated block 556 and some resistor capacitor components. It can make single shot, 2 shots, 3 shots, 4 shots and a running fire. The monostable circuit is made of IC1-1(1/2 556) and C1, R1~R4, when K2 fires switch to turn on, the trigger terminal 6 foot of IC1-1 turns to low level at the moment, the circuit is set, output terminal 5 foot is high level. Then IC1-2 astable multivibrator starts to vibrate, the low level of oscillatory wave turns one time in the output terminal 9 foot, J pulls in one time, J also fires one time. The frequency of shoot can be controlled by the reversal time of IC1-1 monostable circuit. The monostable delay time td=1.1(R1~R4)C1.