Why make a Light Switch I needed a Wifi connected light switch for the workshop, something a bit more robust than the usual indoor white plastic type. It had to run Tasmota – none of that Tuya stuff. So I built one based on some metal push buttons, supposedly waterproof, […]
A small background project. I first looked at this for RC planes. Arduino compatible ATMega328 based module with on-board micro-SD socket. At the moment mostly just a working board in need of an improved sketch to make it more useful. Should be useful for some other SD logging applications. Features: […]
Update – March 2023 The Orange Pi EMMc flash died, probably because I was writing data to InfluxDB every 30-60 seconds for 3 years without compacting it at all. I suspected this would happen but didn’t get around to doing something about it before it failed. I’ve looked at the […]
NiMh Cells Seem To Be Fading Away We have used NiMh cells for years, but they are now harder to find and a lot more expensive. So we are switching the main batteries from 8-cell NiMh to 3-cell 18650 cells with a BMS. We still need a stable and safer […]
This unit has gone to a new home A piece of our micro development past has moved on as of April-2019. During the late 1990s I developed some home automation controllers based on the 68HC11E20 which was one time programmable in a 52 pin PLCC package and later the 68HC11 […]
According to the Specifications The Power Unit is a dual voltage regulator intended for use in larger scale RC with bigger servos and greater power requirements. The higher current ( 8-Amp ) servo output can be jumper selected between 6.2V and 6.7V. The lower current ( 5-Amp) receiver-controller output is […]
With the hot summer days I decided to have a look at improving my fridge temperature controller. A couple of timing adjustments will probably improve it and reduce icing. Making a mini test fridge Not wanting to experiment on the working fridge, I built a small cold-box from foam PVC […]
Experimenting with Solar PV Prompted by a telemarketing call I talked to the sales rep and updated some notes on home solar power systems. What they were offering seemed reasonable, maybe very slightly higher than you could find by shopping around, but they offered a 40 month payment plan. For […]