I’ve been meaning to sort some local graphs out for a while for the radiation monitor, and I found a couple of scripts created by a couple of people over at the uRadMonitor forums for doing exactly this with RRDTool. Using another Raspberry Pi I had lying around, I’ve implemented
Here is a compiled version of the Linux kernel for the Raspberry Pi useful for those who have USB/Serial touchscreens of the 3M Microtouch or eloTouch variety. Works with a freshly installed & fully updated Raspbian image. I have tested this only with a 3M Microtouch EXII controller currently. Simply overwrite
As the first USB hub I was using was certainly not stable – it would not enumerate between boots & to get it working again would require waiting around 12 hours before applying power, it has been replaced. This is a cheapie eBay USB hub, of the type shown below.
The final part for the battery pack has finally arrived, the PCM boards. These modules protect the cells by cutting off the power at overcharge, undercharge & overcurrent. Each cell is connected individually on the right, 12v power appears on the left connections. These modules also ensure that all the
A few modifications were required to the SMPS modules to make the power rails stable enough to run the Pi & it’s monitor. Without these the rails were so noisy that instability was being caused. I have replaced the 100µF output capacitors & replaced them with 35v 4700µF caps. This
Progress is finally starting on the power supply unit for the Pi, fitted into the same case style as the Pi itself, this is an 8Ah Li-Poly battery pack with built in voltage regulation. Here are the regulators, fixed to the top of the enclosure. These provide the 12v &
Here is the project I’m currently working on. A completely wearable computing platform based on the Raspberry Pi & the WiFi Pineapple. Above can be seen the general overview of the current unit. On the left: Alfa AWUS036NHA USB High Power WiFi Network Interface 512MB Model B Raspberry Pi, 16GB