I have a remote operated doorbell which delivers 0.06V to the speaker when the switch is pressed. Obviously the voltage is only created very briefly. My plan is to replace the speaker with a relay switch (?) which then connects the three 1.2V AA batteries across an LED (forward current 24mA, Power dissipation 80mW, forward voltage 3.3V, residual voltage 0.3V, 20mA current requires 15 ohm resistor). Obviously as the voltage is only delivered briefly the switch would need to stay on when the voltage stops and then switch off again when the voltage is reapplied. Can relay switches work like that?
Now my problem is that I haven't a clue how to select the right switch for the job, or how it should be connected to the circuit. I would be most grateful if you would point me to somewhere that can explain how to design a circuit indicated above in words of one syllable. I am a complete novice and my total knowledge about circuits was exhausted calculating the size of resistor above! I tried looking it up in a tutorial, but I was swamped with discussion about NPN transistors, PNP transistors, MOSFET something or others.
I was very proud of my string of LEDs I wired up for Christmas, but it's not exactly rocket science. I would love to learn more and hope you can help me out here.
Many thanks
Dom
Now my problem is that I haven't a clue how to select the right switch for the job, or how it should be connected to the circuit. I would be most grateful if you would point me to somewhere that can explain how to design a circuit indicated above in words of one syllable. I am a complete novice and my total knowledge about circuits was exhausted calculating the size of resistor above! I tried looking it up in a tutorial, but I was swamped with discussion about NPN transistors, PNP transistors, MOSFET something or others.
I was very proud of my string of LEDs I wired up for Christmas, but it's not exactly rocket science. I would love to learn more and hope you can help me out here.
Many thanks
Dom