0 to 1MHz Frequency Counter Circuit with IC MK50398

Free circuit dot com would like to present the frequency counter circuit uses IC MK50398 main operation and a multiplexed seven segment display and uses timer 1 to count edges of the input signal.
The circuit uses the easier method of direct frequency measurement that is simple to do but means that the number of digits displayed depends on the input frequency.

The MK50398 is the one modern decimal counter up/down of six tens IC, with control of screen LED of seven segments and flip-flop of storage. Counter it can measure additive and abstractively. The IC MK50398 is ideal for manufacture frequency counter as the particular circuit.

Components part list

IC3=MK50398
IC1-2-4=4093
IC5-6=4017
IC7=Not exist
IC8=7812
TR1=220V-110Vac / 12V 0.5A
R1=10Kohm
R2-8=1Kohm
R9=8.2Kohm
R10=10Kohm
R11=22Kohm
R12=10Kohm
C1-6=1nF 100V
C2-3=150pF 100V
C4-5=150pF 100V
C7=47uF 25V
C8-9-12=100nF 100V
C10=1000uF 25V
C11= 470nF 100V
D1=12V 0.5W Zener
D2=1N4148 .
LD1-6 =7 segment Display Common Cathode
D3-6=1N4002

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