Hi all,
I'm currently super frustrated trying to get a simple LED circuit working (I've spent a lot of hours trying!). Hoping someone here can help a beginner out a little
Here's what I'm trying to do:
I bought a small amount of 12v LED strip (about 30cm worth), and I wish to be able to dim the strip using a potentiometer. I purchased the KC24W LED Constant Current driver to help me achieve this (data sheet link is below), particularly because I noticed it featured an analogue dimming control. This took my fancy since I'm trying to keep things simple and don't feel any where near confident enough to get involved with PWM.
I'm struggling trying to figure out how to do the dimming part of the circuit. On the data sheet, it clearly states that dimming can be done using either PWM or analoge (my preferred option) using the 2nd pin. The data sheet also sais to use '0-10v', where 0v will be "full on"(maximum brightness?), and 4.5v will be "full off" (lowest brightness?).
I've got my circuit diagram shown below, and the bit highlighted in red is what I can't figure out how to do. Could someone please help me understand this, and if possible provide an extension to my circuit diagram showing what it should look like and how I can control this '0-10v' or '0-4.5v' using a potentiometer (I bought a 100k pot but suspect I may have picked the wrong one - I guessed at the time of purchase) ?
Also does the '0-10v' source share the same GND the KC24w (pin 4) ? As one of my tests I tried simply providing 1.5v using a AA battery and expected a result however nothing happened.
* The LED strip is rated at 12V, and when I run it in series with my multimeter it draws 165mA @ 12v.
* KC24W data sheet link: http://www.jaycar.com.au/medias/AA0...JlNzI4ODdhYWM4ZGI5OWMyYmRjMGNhZDliNzBkODljN2I
Thanks a lot,
Rumpole
I'm currently super frustrated trying to get a simple LED circuit working (I've spent a lot of hours trying!). Hoping someone here can help a beginner out a little
Here's what I'm trying to do:
I bought a small amount of 12v LED strip (about 30cm worth), and I wish to be able to dim the strip using a potentiometer. I purchased the KC24W LED Constant Current driver to help me achieve this (data sheet link is below), particularly because I noticed it featured an analogue dimming control. This took my fancy since I'm trying to keep things simple and don't feel any where near confident enough to get involved with PWM.
I'm struggling trying to figure out how to do the dimming part of the circuit. On the data sheet, it clearly states that dimming can be done using either PWM or analoge (my preferred option) using the 2nd pin. The data sheet also sais to use '0-10v', where 0v will be "full on"(maximum brightness?), and 4.5v will be "full off" (lowest brightness?).
I've got my circuit diagram shown below, and the bit highlighted in red is what I can't figure out how to do. Could someone please help me understand this, and if possible provide an extension to my circuit diagram showing what it should look like and how I can control this '0-10v' or '0-4.5v' using a potentiometer (I bought a 100k pot but suspect I may have picked the wrong one - I guessed at the time of purchase) ?
Also does the '0-10v' source share the same GND the KC24w (pin 4) ? As one of my tests I tried simply providing 1.5v using a AA battery and expected a result however nothing happened.
* The LED strip is rated at 12V, and when I run it in series with my multimeter it draws 165mA @ 12v.
* KC24W data sheet link: http://www.jaycar.com.au/medias/AA0...JlNzI4ODdhYWM4ZGI5OWMyYmRjMGNhZDliNzBkODljN2I
Thanks a lot,
Rumpole