In an older experiment with the chip, I did not connect pin 3 at all. One thing where I'm not yet sure about is whether the DS1820 actually needs the phantom power. There is one line that may need tailoring, depending on the variant of DS1820 thermometer chip you have: When you put the board onto the extension header of the Pi (the inner row closest to the CPU), the following little shell script will light all LEDs and then display the current temperature every second

The other nice thing about Fritzing is that it allows you to publish your designs so that other makers can take them, create them, or remix them to their needs. The following image shows the final PCB assembled and mounted on a Pi. I went the route of the Fab service, waited a bit, and got some very professional PCBs back. Or you can send them to the Fritzing Fab service.įritzing was created by FH Potsdam in Germany and is now evolving via the Friends of Fritzing Foundation. Once you're happy with the designs and/or the PCBs, you can export them as images (which is what you often see in the Arduino documentation). Most of the time, though, it needs some human help. After some more searching I found Fritzing, which was exactly what I was looking for.įritzing is an open source application that allows users to create schematics by selecting parts from a large part library, connecting them, and laying them out on a virtual breadboard.Īfter the schematic is created, Fritzing can autoroute the schematic onto a PCB design (it supports single and double-sided PCBs). On top of that, I also did not want to manufacture the PCBs myself with all the chemicals needed. Unfortunately, nothing was really great for hobbyists like me. I played around with some options for producing the layouts. The main motivation here was to be able to run some workshops at the local Java User Group, where people would solder the board and then program it. It worked, but it wasn't pretty:Īs I worked on the concept, I decided I needed some printed circuits (PCB). For the next iteration, I took a stripe PCB and soldered the components onto it. The first iteration was on a bread board with some wiring to connect to the Pi. A while ago, I created a small extension board for the Raspberry Pi to do some hardware hacking.

Raspberry pi fritzing