So that I can continuously post environmental data to the Blynk cloud service from my Bluetooth environmental monitor, I’ve implemented a simple design using a Keyes HM-10 Bluetooth 4.0 module and a Wemos D1 mini WiFi device as a Bluetooth hub and internet gateway. If you are not familiar with the Wemos D1 Mini. It’s Read more about BLE serial hub to WiFi and Blynk visualisation app[…]
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 you’d be wise to be aware of:- Potentially lethal items – Button batteries, pills, dish washer tablets, furniture falling or tipping onto them including drawers wardrobes and TVs. Baby temperature. Read more about Baby safetification[…]
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 visualisation tool which I regularly use. Purple boards. Edges need the break off tidying up when you receive them. Seeed studio – China Used without any issues. PCBs.io – United Read more about PCB fabricators[…]
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. To do both you need a good grounding in all the basics and a good feel for how they tie together. I’ve been an electronic design engineer for a Read more about Obtaining a UK Amateur Radio License – Racing down the M6 heading for the M0[…]
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 that. After spending somewhere around £80.00 designing and building a calibrator for my cheapo old multi-meter i feel I’ve given this project more than it needed:-) There Read more about Digital multimeter calibration for voltage, resistance and current[…]
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 saw a simple idea on instructables.com for controlling a paper airplane using a TV remote control unit. I built my own version using a rubber band Read more about Infra red remote controlled plane[…]
Love transcends all. But love can be transformed into hate so easily if we allow ourselves to become indifferent to the problems hate causes.
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 manner to a level where it could be left turned on over night so that I could see the baby but not wake him in his Moses basket. Read more about LED lamp dimmer with a 555 timer and comparator[…]