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AC Grid Frequency Meter

Monitor Mains Frequency and Voltage

AC Grid Frequency Meter
AC Grid Frequency Meter
The frequency of the mains voltage is a good indicator of the grid’s load. This grid frequency meter not only monitors this important parameter of our AC line supply, but also the mains voltage.
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Materials

Component list

Component List

Resistors

R1,R12 = 1k5

R2,R4 = 47 Ω

R3 = 2k2

R5,R8,R9,R10 = 10 k

R6 = 3k3

R7 = 47 k

R11 = 10 k trimmer, multiturn

R13 = 10 k trimmer

 

Capacitors

C1,C4,C6,C7 = 100 nF

C2,C3,C5,C8 = 470 µF, 25 V radial

 

Semiconductors

D1,D2 = 1N4007

D3,D4,D5 = 1N4148

T1 = BC547

IC1 = 7805

IC2 = PIC16F1825

 

Miscellaneous

S1 = pushbutton NO

DIS1 = alphanumeric LCD 2 x 16 characters

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