![]() So I got the idea to send the data over the network to my laptop which could spend all the CPU it wanted on animating plots and updating and stuff. Maybe a RPI2 could handle it, but the B+ was too slow. But frankly, it was just too slow to handle the live-plotting plus the encryption and forwarding of the X11 graphics over ssh (I even dumbed down the encryption since I was on a local network). first thermocouple readingsĪt first I tried getting the Raspberry PI to plot it live. It actually has a build-in temperature sensor as well so you can get its temperature and the temperature at the end of your thermocouple wire. Then I just uncommented the Hardware SPI section in the Adafruit Python library example and got some readings. This was supposed to be fastest so I figured, why not. I decided to hook it up to the hardware SPI interface on the PI. There’s even a Python library for it that makes it easy to access. Conveniently, the MAX31855 does amplification and ADC and is like $15, so I got one. And since I wanted to read it on a Raspberry PI (which only has digital inputs), I’d need an analog-to-digital converter (ADC). The Seebeck effect that makes it work only gives microvolts per degree so I needed a good amplifier for it. I bought a K-type thermocouple for several dollars that ranges from -100☌ to 500☌. This post is about how I got one and wrote a Python program to send the data from a Raspberry PI over the network to my laptop, which plots the results in real time. Sensors are fun! I wanted to keep an eye on the temperature of one of my home physics projects and realized I needed a thermocouple and a convenient way to read it. Air quality PM 10.0 measurements around Tiki Torches.A failed attempt to find some Uranium in Washington State.Making a cloud chamber to see radiation without needing dry ice.Host your own contacts and calendars and share them across devices.The Infopanel: a simple MQTT-connected display system for weather, traffic, pictures, animations…anything!.Sending and receiving Morse code with a laser and a Raspberry Pi.The modern era passed through a cathode ray tube. ![]() Making a cheap and simple barn-door star tracker with software tangent correction for astrophotography.The Total Solar Eclipse Experience in the Malheur National Forest.A (medium-length) primer on energy, greenhouse gas, intermittency, and nuclear.
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