Updated CH340G board

Some weeks ago I blogged about my project of a minimal board based on the CH340G chip. After some tests, I slightly modified the project: [checklist] I added two leds that blink when data are transmitted/received I added a jumper that allows to decide if you want power supply (5V) in the connector or not added a 10nF capacitor to make…

CH340G board

On this site I’ve already posted about the CH340G chip, manufactured by a chinese company and often adopted as a cheap solution when a USB -> serial converter is needed. As the chip package (SOP16) is quite easy to solder, I ordered some ICs from AliExpress and I designed a minimal demoboard, based on the reference schematics: You can download Eagle files (both schematics…

Nixie thermometer – let’s display the temperature

Today I wrote a sketch that merges the previous ones: reads the temperature from a thermistor (connected to PIN A0) and displays it driving two nixie tubes. I also added a third nixie, to display symbol °C. This tube is not controlled by Arduino but it’s directly connected to the power supply (and therefore it’s always on): The sketch is…