Indicators – vehicle

[Speedy Builder5Participant @speedybuilder5]

Electronic help please.  I have a 1979 Mini, simple wiring, no MCU etc.  I need to add a BUZZER to the indicator circuit.  Currently when a direction is chosen, the dashboard indicator is energised by the +12 volt supply from that circuit with the earth return via the lamps of the opposite circuit.  I assume this works as the indicator lamp is very low wattage compared to the 2 x 18watt bulbs and a 5watt repeater bulb.

The flasher unit is a simple 2 terminal unit (Made complicated as the replacement I use requires an earth [not shown] because the internal gubbins is some sort of electronic thing).  It does not have a terminal for a repeater lamp.

I need to add a buzzer to the circuit which happens to be a polarised device.  Can I simply add a couple of back to back diodes to give me a positive feed to the buzzer irrespective of the chosen direction.

I can’t add it to the flasher unit as there is about a constant 6.5 volt on the delivery side of the unit and the buzzer sounds all the time !.

Bob

[noel shelleyParticipant @noelshelley55608]

Not worth the hassle of making, just buy one, But Ah why do you need it ? Not for a trailer then ? Put 2 buzzers one in each indicator circuit. or even buy a trailer device and use it as a bulb failure warning even. Noel.

[Speedy Builder5Participant @speedybuilder5]

I need it as the self cancelling does not self cancel on moderate turns and I need a reminder. Some day Noel, you may need one !

Anyway, where is the spirit of discovery ?

Bob

[renardiere7Participant @renardiere7]

I did exactly this in a Caterham about 15 years ago, memory is not great but I’m pretty sure I did exactly what you have drawn above.

[Robert Atkinson 2Participant @robertatkinson2]

What you have drawn will work perfectly.
Just about any diode will be OK. I’d suggest a 1N4001 (or any froom 4001 to 4007)

Robert.

[Speedy Builder5Participant @speedybuilder5]

Thanks Robert

Bob

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