Kit Velleman MK120 Infrared Barrier

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1

Hello every body !

Hello, I assembled a kit MK120 - Infrared Barrier.
On this MK120 Velleman kit, I would like to replace the buzzer by a relay. Can anybody say to me what is the maximum consumption of a relai which I would install as a replacement of the buzzer? Thank you very much in advance - hupchen.

2

100mA. max.
Make sure to put a diode over the relay coil to protect the transistor (e.g. 1N4148 or 1N4007).

3

Thank you very much for your kind answer ! ! ! NICE ! ! ! :smiley: