Hello,
New to the forum, seems like a great place! I am trying to run a relay from a Voice activated tape recorder that I have taken apart. It runs on 4AA batteries and has an LED that lights up when activated by sound. With the LED in place, the voltage across the wires is 1.8V DC. Without the LED, it reads 4.95V DC. I will be driving a 5 or 6V relay (I have both). the 5V is part #JW2EN
From the datasheet:
New to the forum, seems like a great place! I am trying to run a relay from a Voice activated tape recorder that I have taken apart. It runs on 4AA batteries and has an LED that lights up when activated by sound. With the LED in place, the voltage across the wires is 1.8V DC. Without the LED, it reads 4.95V DC. I will be driving a 5 or 6V relay (I have both). the 5V is part #JW2EN
From the datasheet:
Nominal operating
current, mA
(
current, mA
(
±10%) 106
Coil resistance,
W
(±10%) 47
I've tried using a 3904 transistor with a 1K resistor and a 4148 diode across the relay, but it didn't work. I've thought about using a 4n35 optocoupler to drive a transistor, but don't know how to get any values for resistors or how to determine which transistor to use. I'm just looking for input on what to consider or how I can make this work. If there is any other info anyone needs, please let me know. Thanks for taking the time to read this.
Coil resistance,
W
(±10%) 47
I've tried using a 3904 transistor with a 1K resistor and a 4148 diode across the relay, but it didn't work. I've thought about using a 4n35 optocoupler to drive a transistor, but don't know how to get any values for resistors or how to determine which transistor to use. I'm just looking for input on what to consider or how I can make this work. If there is any other info anyone needs, please let me know. Thanks for taking the time to read this.