Velleman projects K3500 Assembly instructions - Manual (Page 7)

7
Construction & connection
J1 : 3 x 2P
IC1 : NE555
IC2 : NE555
IC3 : CD4093
10. IC, Check the position of
the notch!
Install the push button within driver’s reach and connect it to the screw
connector (marked SW1).
Interrupt the wire to the door contact (driver’s door) and connect the wire
to the point marked “OUT”.
Connect the “+” connection tot the car’s +12V.
Make sure that there is tension on this connection constantly!
Connect the “-” connection to
the car’s chassis.
11. Connection
Fig. 1.0
9. Screw connectors