Arkham00
Member
In the circuit that is attached to the first post of this thread there is a strange connection of the transistor that drives the relay.
If you use a transistor connected to +Vcc, it must be a PNP with emitter connected to +Vcc and collector towards the relay coil (in the schematic, it's an NPN connected in reverse).
If you want to use an NPN, use it with emitter towards GND and collector toward coil as in the second schematic posted in the thread.
Indeed, the relay contacts for the flasher (first schematic) are completely wrong.
If you use a transistor connected to +Vcc, it must be a PNP with emitter connected to +Vcc and collector towards the relay coil (in the schematic, it's an NPN connected in reverse).
If you want to use an NPN, use it with emitter towards GND and collector toward coil as in the second schematic posted in the thread.
Indeed, the relay contacts for the flasher (first schematic) are completely wrong.