Frequency Divider

This is a classic divider of frequency via two. It is achieved with a classic circuit T-flipFlop, round IC1 [ 4011 ]. In the circuit, the frequency of network, after are limit the negative half-s period of sine wave and transform in square wave, are divided via two. Thus for frequency50 HZ, we will take in the exit pulse of frequency 25 HZ. The supply of circuit it is + 5V and does not need high benefit in current.
Frequency Divider - schematic

Part List R1= 10Kohm R8= 47 ohm IC1= 4011 R2= 100Kohm R9-10-11= 100Kohm T1= 110/220Vac //8V 100mA R3= 680 ohm C1= 1000uF 25V D1-2= 1N4007 R4= 1Mohm C2-3= 100nF 100V ceramic D3= 5.1V 0.5W Zener R5-6-7= 100Kohm C4-5= 100pF ceramic D4-5= 1N4148

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