MC68HC11EVS and M68EM11E20

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 […]

68hc11 evs

dip vs soic pic-micro

Strange Microchip PIC behaviour

A 10  minute change that has taken 3 days I needed to change a time delay in a 8-pin PIC12F675 project started 4 years ago but has been updated since.  No problem I thought, change the time, recompile, save a new output file and program some chips. But the chips […]


Mouser Order Delayed

Conclusion – Resolved Keep enough stock on hand – but how much is enough.  Don’t rely on suppliers to come through if you are caught short. Mouser did resolve the issue and release the order. But we will have a 4-5 day gap in production. Not Always Quicker Being a […]

mouser

WH1081 with Orange Pi Zero

Weather Station Update

May 2019 Update It has been an eventful month.  The Orange-Pi-Zero running WeeWX stopped working and later the WH3081 sensor transmitter failed. The O-Pi-Zero is running from a 16GB micro-SD card and was saving data to a 4GB SD card plugged into USB.  The 4GB SD card was corrupted, probably […]


FPV Tracker on 2S Lipo – a question from Dave

Question: I just wanted to know the operating voltage for the FPV RC BEACON, when its signal lead is connected to a RC receiver running directly on a 2S Lipo, which can reach 8.4V when freshly charged. Maybe a glider install. Answer: The FPV tracker does monitor the power and […]

Tracker versions

orange pi lite sbc

Orange Pi Lite and Zero boards

I have a couple of applications in mind and thought these boards looked quite interesting.  Small, low cost reasonably powerful.  So I bought two each of the Orange Pi Lite and Orange Pi Zero boards, and a couple of camera modules. The first application is a weather station, which is […]


6 Position Rotary Switch – flight modes

They need modification I got a couple of these 6 position rotary switches from Ebay and fitted one to a Turnigy 9XR Pro transmitter replacing one of the analog pots.  The solder pads are labelled VCC, GND and FLAP, I assumed for +5V, GND and SIgnal. The result was a […]

6 position flight mode switch

linux logo

Linux Update – Feb-2021

Background Linux is the stuff going on in the background, the various flavours are what you see on the screen and how it works for you.  The variations are referred to as Distros. I have been using Linux for everyday desktop machines for 10+ years.  From memory, Red Hat briefly, […]