I recently harvested a circuit board from a generic DJ laser unit that has two drivers on it. One was powering a 50mW 532nm diode and the other was powering a 100mW 650nm diode.
![4 - circuit board.jpg 4 - circuit board.jpg](https://laserpointerforums.com/data/attachments/51/51845-c9db86939332f91a3dbdcc33ff26c469.jpg?hash=yduGk5My-R)
I'd like to use this to drive a 55mW 488nm diode (Sharp GH04850B2G), but I'm not sure how test to make sure it won't get burned out.
I tried making a test load with a 1 ohm resistor and 5 1n4001 diodes in series, but the voltage drop across the resistor was only 0.0046V which seems really low. I might be doing something wrong.
![91563488_870263800102175_2564718104235999232_n.jpg 91563488_870263800102175_2564718104235999232_n.jpg](https://laserpointerforums.com/data/attachments/51/51846-6f3935690e293974a5edea31a95ebcab.jpg?hash=bzk1aQ4pOX)
![91306838_893591091065894_3008585674149330944_n.jpg 91306838_893591091065894_3008585674149330944_n.jpg](https://laserpointerforums.com/data/attachments/51/51847-cc93a2d72b29506edf43800611696f34.jpg?hash=zJOi1yspUG)
Any advice would be greatly appreciated!
![4 - circuit board.jpg 4 - circuit board.jpg](https://laserpointerforums.com/data/attachments/51/51845-c9db86939332f91a3dbdcc33ff26c469.jpg?hash=yduGk5My-R)
I'd like to use this to drive a 55mW 488nm diode (Sharp GH04850B2G), but I'm not sure how test to make sure it won't get burned out.
I tried making a test load with a 1 ohm resistor and 5 1n4001 diodes in series, but the voltage drop across the resistor was only 0.0046V which seems really low. I might be doing something wrong.
![91563488_870263800102175_2564718104235999232_n.jpg 91563488_870263800102175_2564718104235999232_n.jpg](https://laserpointerforums.com/data/attachments/51/51846-6f3935690e293974a5edea31a95ebcab.jpg?hash=bzk1aQ4pOX)
![91306838_893591091065894_3008585674149330944_n.jpg 91306838_893591091065894_3008585674149330944_n.jpg](https://laserpointerforums.com/data/attachments/51/51847-cc93a2d72b29506edf43800611696f34.jpg?hash=zJOi1yspUG)
Any advice would be greatly appreciated!