Archive for January 2015

Turn Your Android Phone into a Wireless Touchpad

In this blog post, I will show you a simple way of turning your Android phone into a wireless touchpad. For this to work all you need is your Android phone, an Arduino board and a HC-06 (or HC-05) bluetooth module based on BC417. A short demonstration video is included towards the end of the post. Continue reading ‘Turn Your Android Phone into a Wireless Touchpad’ »

Reverse Engineering a Beseler PM2L Color Analyzer

I recently acquired an old Beseler PM2L color analyzer. This kind of color analyzer was designed to analyze the color or exposure of film negatives at a certain location by comparing the intensity of the filtered light of each color channel (CMY and white). The PM2L model was made in the 70’s through early 80’s and has long become obsolete. But since it has a 931A photomultiplier tube (PMT) inside, you can easily repurpose it for other uses. And the good news is, these old color analyzers are cheap on eBay. You can usually grab one for a price cheaper than a bare PMT itself. Continue reading ‘Reverse Engineering a Beseler PM2L Color Analyzer’ »