Turnigy 9XR-Pro Notes

These are just a few notes and comments created along the way.  I hope they will help others.  If you have any comments or additional information, please let me know and I will update here. NOTE: I don’t use Windows. It is supposed to be possible to update these transmitters […]

Turnigy 9XR-Pro switch

fpv display repair

Repair of 7″ LCD display for FPV

Power Supply Failure For no apparent reason the main voltage regulator burnt up while operating from a 3-cell Lipo battery (about 12V). It may be that if the supply voltage drops low enough, the switch-mode regulator can’t cope and self destructs. It looks like the failed switch-mode regulator drops the […]


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 […]