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Power transistor, Ic. watch the position of the notch, Adjusting the built-in clock – Velleman projects K7300 Assembly instructions User Manual

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8

Construction

21. Power transistor

T3 :

BD676

10mm
M3 BOLT

M3
NUT

LOCK
WASHER

METAL SIDE

22. IC. Watch the position of
the notch!






IC1 : CD4536

IC2 : LM324


Mount a shunt over the CAL connection.





Mount a shunt over the 52 min selection (quick
charge setting).




Mount a shunt over the 1.2V selection (charge a 1.2V battery).

Connect a DC mains adapter of 15V/800mA (ex. PS1508).
Check that the "-" is on the outside edge of the connector.

Turn the trimmer, RV1, to its mid position.

Push the push button, SW1, the green LED should normally light up.

After 12 seconds, the LED should go out. If this is not the case, then
adjust the trimmer. To the left reduces the time, to the right
increases the time.

Remove the CAL shunt.

23. Adjusting the built-in clock.

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52

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