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Developing the Solar Soil Sensor

Posted by Matthew Little on

My houseplants have been dying due to a mixture of over and under watering. So I thought something to help stop that would be good. And even better if it's solar powered. I've been working with a solar powered ATTiny85 for the Solar 8 Ball and Solar Dice kits and thought I could use the same basic circuit to implement a solar powered moisture sensor. So I came up with the Solar Soil Sensor. This blog post highlights some of the design decisions and how I implemented everything. Moisture Sensing The first this was to figure out a good way...

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Workshop Environmental Monitoring Project

Posted by Matthew Little on

I have built an environmental monitoring unit for my workshop. This measures: Air Temperature, Humidity & Pressure PM2.5 and PM10 Particulate values Radiation levels It shows the data on a small OLED screen. There is a large LED RGB display which changes colour if data goes above warning levels. This unit sends data to AdafruitIO via MQTT messages. This is all based on the 'Cheeseboard', which is an ESP8266 development board, based upon the NodeMCU. Pretty pleased with the end result. You can view my data here on Adafruit IO dashboard. (Please note: there are a few blips in the data...

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Monitoring Radiation with the CheeseBoard

Posted by Matthew Little on

This post covers adding a radiation sensor (Geiger counter) to my environmental monitoring system.   A while ago I had purchased a NETIO  GC10 v2.4 Geiger Counter. This measures Beta and Gamma radiation and has a serial output, at 9600 baud. The unit was designed in the aftermath of the Fukushima disaster as a low cost way for monitoring radiation levels. Some more links to this unit are here: Manual for GC10 NetIO Unit (assembly in English) NetIO Shop (currently sold out!) GC10 (aka 'Kinoko Geiger') users group (mainly Japanese) Review of the unit (youTube) I wanted to include this sensor...

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Learning Links

Posted by Matthew Little on

Useful links for online educational resources for younger folk wanting to learn electronics, science and code.

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