Lesson learned, don't try to hook up multiple 5mw diodes with their own drivers off of a single power supply. I saw a puff of smoke from the board and burned out a nice little green number the other day :cryyy:.
So, I am trying to build a constant regulated voltage of 3.2 volts out using an LM317t. I am powering an array of 5mw diodes that already have their own drivers and they just need constant voltage. The reason for using the voltage regulators, is that I want to power all the diodes with one 18V bus supply. Therefore, I need to put each one on an isolated, regulated supply. The output from the LM317 will go to the standard setup of a 1N4001 and a 47uf capacitor. I don't want to mess with pots since I am doing fixed voltage and should be able to accomplish what I want with just resistors adjusting the output voltage. Can someone tell me how I can figure out what ohm and wattage resistors to use to accomplish this? What's the formula?
So, I am trying to build a constant regulated voltage of 3.2 volts out using an LM317t. I am powering an array of 5mw diodes that already have their own drivers and they just need constant voltage. The reason for using the voltage regulators, is that I want to power all the diodes with one 18V bus supply. Therefore, I need to put each one on an isolated, regulated supply. The output from the LM317 will go to the standard setup of a 1N4001 and a 47uf capacitor. I don't want to mess with pots since I am doing fixed voltage and should be able to accomplish what I want with just resistors adjusting the output voltage. Can someone tell me how I can figure out what ohm and wattage resistors to use to accomplish this? What's the formula?