Hot Water Production Delay Timer

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Component list
Component List
Resistors
R1 = 220 k
R2 = 470 k
R3 = 12 k
R4 = 2k2
R5 = 27 k
R6,R7 = 1 k
Capacitors
C1,C2 = 47 µ/25 V radial
C3 = 100 n
Semiconductors
LED1 = LED 5 mm red
LED2 = LED 5 mm green
D1 = 1N4148
Q1 = BC327
Q2 = BC337
U1 = PIC12F683
U2 = 78L05
Miscellaneous
RL = 5 V relay OMRON G6H-2-100 or equivalent
But1, But2 = push button 6 mm
J1..J3 = 6-way terminal block pitch 3.5 mm
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