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Casio fx-61F Electronic Formula 27 Calculator
My old trusty Casio fx-61F “Electric formula 27”¬†calculator is still going strong and gets regular use. It was bought in a sale from Maplin [...]
Ticket To My Heart – Admit One
With Valentine’s Day approaching I thought I would share this design for a custom gift which I made. It’s a Printed Circuit Board (PCB) in the [...]
Becoming the best you can be
Read, think about and apply this to your work and study. The Kung fu master is the top of their art form. To be a master takes huge dedication, many years [...]
OU T202 analogue and digital electronics
I was just reminiscing about old times and remembered the excellent Open University (T202) course i did in analogue and digital electronics. I studied it [...]
Infra-red remote control tester
Is the TV broken, has the TV software stopped responding or is it just that the remote controls batteries have gone flat again? This little paper circuit [...]
BLE serial hub to WiFi and Blynk visualisation app
So that I can continuously post environmental data to the Blynk cloud service from my Bluetooth environmental monitor, I’ve implemented a simple [...]
Baby safetification
After safetyfying the house against a rampaging 10 month old I’m not sure it will ever be the same again. Here’s some risk areas which [...]
PCB fabricators
Here’s a quick list of PCB fabricators with my own notes against them OSH park – united states Good for small PCBs. Great online PCB [...]
Obtaining a UK Amateur Radio License – Racing down the M6 heading for the M0
There are two areas of electronics which really teach you what you need to know about pure analogue electronics. They are Audio and Radio Frequency design. [...]
Digital multimeter calibration for voltage, resistance and current
I got a little carried away with this one! I have an old multi-meter whose calibration was unknown. Surely an accurate voltage reference would help with [...]
Infra red remote controlled plane
Flying a remote controlled plane can be a lot of fun but it can seem like a complicated thing to design a complete control system yourself. A while ago I [...]
Indifference amplifier
Love transcends all. But love can be transformed into hate so easily if we allow ourselves to become indifferent to the problems hate causes.
LED lamp dimmer with a 555 timer and comparator
I wanted a simple bedside lamp with a continuously variable brightness. Something I could read from whilst also being able to dim the lamp in an analogue [...]
Environmental Monitor Node Using HM-10 Bluetooth LE
Knowing the babies room temperature has become a bit of an obsession. When the temperature changes you need to make sure baby doesn’t wake up due to [...]
Soil moisture man
Soil moisture man was a simple attempt to indicate when household plants needed to be watered. The idea was to make it all analog rather than doing it the [...]