My problem is that I can't get the relay to turn on? Typical relays I've worked with has the control input just a a voltage, but I've tried applying a voltage, a current (from the specs and higher), and nothing turns on the relay.
Has anyone had any experience using these relays? Or has any suggestions for alternatives? Ideally I would want it to be able to control the relay from TTL logic source.
You did use a resistor in series with the input LED, right? You need a resistor (just like if turning on a visible LED) to limit the current. The Vf of the LED is ~1.6V, and the desired current is 30 to 50mA. The value of the resistor depends on the source voltage...
Yes I put a resistor in series, calculated so it provides anywhere between 10-50 mA (i'm using a variable psu right now). No dice. Tried a 2nd relay chip and didn't do anything either.
Thanks for the reply guys. Stupid me fried two of these by hooking it up in the beginning without a resistor before reading the datasheet carefully. =/
Thanks for the reply guys. Stupid me fried two of these by hooking it up in the beginning without a resistor before reading the datasheet carefully. =/