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Eco-Timer with Auto-Shutdown

Needs 0.0 mW in Off Mode!

Eco-Timer with Auto-Shutdown
Eco-Timer with Auto-Shutdown
The main feature of this timer is that it disconnects not only the load but also itself from the mains when the time is up. This saves electricity, extends the service life and also complies with safety regulations. Just as with a start/stop relay circuit, in the event of a power failure, it is only reactivated when the Start button is pressed again.  

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Materials

Component list

Component List

Resistors

R1 = 330 k

R2 = 3M9

R3 = 47 k

R4 = 220 k

R5 = 10 k

R6 = 1 k

R7 = 47 k trimpot

 

Capacitors

C1 = 47 n

C2, C3 = 100 n

C4 = 220 µ / 25 V, electrolytic

 

Semiconductors

D1 = 1N4001

D2 = 10 V, Z diode

T1, T2 = BC337

IC1 = CD4060B

 

Miscellaneous

Tr1 = Transformer 12 V sec., 1 VA

Re1 = Relay 12 V, DPST 230 V / 5 A

S1 = Push button, 230 V / 5 A

J1 = 2 × 3-pole pin header with jumper

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