Hi!
I'm requesting help on the following subject:
I have an electronic board with output LEDs (2 V DC), the LEDs flash signaling any equipment malfunction.
What I want to do, is to use these LEDs as digital inputs for a controller (Siemens Logo!). To have a logic value of 1 the controller needs a voltage bigger than 9 V DC, so I would have to amplify my 2 V DC up to 10 or more V DC.
I was thinking of using an operational amplifier, but I don´t know wich one to use since I only have 24 VDC supply voltage...
Any suggestion?
I'm requesting help on the following subject:
I have an electronic board with output LEDs (2 V DC), the LEDs flash signaling any equipment malfunction.
What I want to do, is to use these LEDs as digital inputs for a controller (Siemens Logo!). To have a logic value of 1 the controller needs a voltage bigger than 9 V DC, so I would have to amplify my 2 V DC up to 10 or more V DC.
I was thinking of using an operational amplifier, but I don´t know wich one to use since I only have 24 VDC supply voltage...
Any suggestion?