Hello, I'm trying to build a circuit below where the LED will toggle every second. I'm using this relay: https://www.farnell.com/datasheets/1918250.pdf. -- model v23105-a5401-a201. So I am at a point where I don't even have the LED+resistor in the circuit. I just want the relay to turn-on-off every second. I have a 1000uF capacitor. What happens is that with just the relay and the power supply connected, the relay thrashes, which I expect. When I connect the capacitor, things slow down but I want to slow them down to once per second. I don't have a higher value capacitor, so I was trying to put a resistor (R2) in. Above about 60 Ohm, the relay stops working completely though. My power supply is 5V but I've also tried 9V.
Here's a portion of the datasheet:
Does that mean the coil must have 5V of voltage minimum to work? If so, it would explain why putting a resistor in makes it stop working -- since there will be a voltage drop on the resistor?
For simplicity, according to my calculations, with a 1000uF capacitor I would need a 200 Ohm resistor to get the time constant of 0.2 second. Since it takes 5 such constants to charge a capacitor fully, I will get my 1-second cycles. I might be off, but it's close. The problem however is that this relay stops working with much smaller value resistors.
Any ideas are welcome!
Thanks!!
Here's a portion of the datasheet:
Does that mean the coil must have 5V of voltage minimum to work? If so, it would explain why putting a resistor in makes it stop working -- since there will be a voltage drop on the resistor?
For simplicity, according to my calculations, with a 1000uF capacitor I would need a 200 Ohm resistor to get the time constant of 0.2 second. Since it takes 5 such constants to charge a capacitor fully, I will get my 1-second cycles. I might be off, but it's close. The problem however is that this relay stops working with much smaller value resistors.
Any ideas are welcome!
Thanks!!