I want to use my electric door bell to trigger a wireless door bell. I replaced the transmit button of the wireless transmitter by a relay and connected it parallel to the speaker of the electric doorbell. When the doorbell is pressed, the relay switches. This works fine.
However, the outside button implements a light, so there's always a small current in the circuit, enough to keep the relay closed once it is triggered. In other words, my Wireless door bell keeps transmitting also after releasing the doorbell, as long as it has been triggered once. What can I do to resolve this problem?
simulate this circuit – Schematic created using CircuitLab
if you wish to make this then i would post the exact schematic.
Best Answer
You might put a resistor in series with the relay coil. Choosing the resistor value is tricky without measuring what is going on. A possible way of finding a suitable value is to keep adding series resistors of 10 Ohms until it is not able to trigger, and then remove the last resistor.