Here you can find some smaller side projects.
1. The LED Amplifier
We needed a LED source for a spectrometer application. But LEDs tend to drift with temperature. We came up with the amplifier design that controls LED current with the feedback loop. As the result LED intensity is accurately controlled and drift is minimal. This amp can be used with small lasers too.
The schema is here, LED_amp_schema.pdf .
If you use this in your own projects remember to send a photo and comment!
2. The Raspberry Pi Camera Mount
We made a simple camera mount for the Raspberry Pi. It consists of two parts, one that is connected to the camera (green) and the other to be screwed onto a support (yellow). Parts are connected simply using a gentle force to bend the yellow part while pushing both axle stubs of the green part to the holes.
The camera should keep the selected direction firmly despite the wind or other nuisances. Only friction of the axel fitting resists free rotation. If the fitting is too loose or too tight you can to adjust the axel diameter slightly, maybe +/- 0.2 mm.
The camera board has been connected using M2x5 mm screws. You need to make M2 threads with a tap.
You can download the files from Thingiverse
https://www.thingiverse.com/thing:6004763
Let us know your comments!
Experimental Photonics 