Mowing the lawn using battery power
An impulse buy - Florabest 36V Lithium-ion cordless lawnmower. The 36V 2600mAh 93.6Wh battery contains 20 cells, so they must…
65k colour oled 96×64 pixels , arduino uno and ucglib
My first test of a full colour OLED display using Oli Kraus's Universal Color Graphics Library (ucglib).
Julian’s postbag: #62 – colour oled, 400kv taser, salt car
More cheap electronics stuff from China :) Support Julian's Postbag videos via Patreon: https://www.patreon.com/julian256?ty=h 10pcs Block Terminal Wire Connectors 2EDG…
Playing with bluetooth le
A fun day playing around with Bluetooth smart watches (fitness trackers), Bluetooth discovery apps and an Arduino Uno with nRF24L01+.…
Teardown: 50w led floodlight
An eBay bought 50W LED floodlight with PIR detector. It cost about £14. It's large, probably to help with heat…
Julian’s postbag: #61 – green watch, 12v powerbank, doorbell
More cheap electronics stuff from China :) Support Julian's Postbag videos via Patreon: https://www.patreon.com/julian256?ty=h OLED Bluetooth Health Wristband Sport Fitness…
Idea: lithium cell balancing using ac power transfer
Using small transformer-coupled battery chargers, each cell in a lithium battery pack can transfer energy to all the other cells…
Dodgy kit build: electronic burglar alarm with bad science
This dubious electronics burglar alarm kit, which cost 50p at my local charity shop, kept me amused for a full…
Julian’s postbag: #60 – electronics modules from china
More cheap electronics stuff from China :) Support Julian's Postbag videos via Patreon: https://www.patreon.com/julian256?ty=h Digital DC Converter CC CV Power…