I’m starting with this post the description of a new project, project that comes from a request by my friend Marco, who builds spectacular custom cases for PCs: build a thermometer to measure the temperature of a CPU liquid cooler and display it using nixie tubes.
Instead of describing the final project, I had the idea to write different posts, like a diary or a build log to show also the way I approach and develop a medium complexity project like this.
Let’s start with the requirements:
- use of temperature sensors (10k thermistors) specific for liquid coolers
- display the temperature (without decimals) with two nixies
- use of a specific nixie tube to display the °C symbol
- use of nixie sockets, to be able to replace them in case of failure
- RGB leds under the tubes, whose colors can be changed using a push button
- round PCB, as small as possible
First, you need to source all the components to build a test unit:
Marco sent me:
- two IN-14 nixie tubes and one IN-19A for the °C symbol
- a power supply module that outputs the required voltage (about 170V) to power on the tubes
- the K155ID1 ICs to drive the nixies and the sockets
- the temperature sensor, designed for liquid cooling systems
In the next articles, I’m going to start building the test unit… stay tuned!