Peltier Mini-Cooler for Fridge Controller tests

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 […]

peltier cooler box

tracker mini receiver

Mini Tracker Receiver added 2

We have just added a simplified low-cost receiver. This works as well as the other receivers but with fewer additional features and at a lower cost. See the product item: HERE See the tracker receiver support page: HERE


More Solar System Notes

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. The details are on this […]

solar panel experiment

Raspberry Pi power board

Raspberry Pi Power Board

Back in 2013 I designed a board to power a Raspberry Pi in a vehicle. It provides 5V regulated for the R-Pi and 12V switched for accessories. The idea is to power up the R-Pi when the ignition was switched on and allow the R-Pi to power down after the […]


Home Automation – IOT – Security – Future Support

Just a collection of thoughts I have no plan or intention with this. It is at the moment just a collection of thoughts; based on some experience. There are few things in a home now that need to or are expected to last more than a few years. It’s only […]


dual colour LED strobe

High power Dual-Colour LED strobe 4

A new Strobe This strobe can be supplied as a dual-colour or single-colour configuration. As dual-colour it alternates between the two colours. RC PPM control allows it to be switch on/off in flight, and between two patterns. The RC control lead can be cut off if not required and the […]


Multi-rotor FPV Transmitter and LED Mounting

Video Transmitter Mounting The small video transmitters get quite hot.  They are supplied covered in a protective heat-shrink which also reduces their heat dissipation.  The hotter they run the less reliable they are; or the more likely they are to fail. This mount was assembled with heat dissipation and a […]

FPV transmitter mounting

lost model tracker fitted to small quad

Smaller Quads and Lost Model Tracker

250 size FPV quad racing Finding a 250 size quad in long grass can be a problem. I suggest using at least a audio alarm. The racing circuit is usually well defined and searchable. RF trackers work best over longer ranges. The beeper will help within the last 20 meters […]