Up: My tech notes
New 22Apr2020, updated 05Nov2025

THE NEWEST NOTE
275 Timeteller elretur-retur – A note about reuse of an hour counter (in Norwegian, but link to English auto translation). Should wrap around in 2034, since I started at on 10Oct.2025 at noon
272 My alkaline batteries power bank a prospective battery bank, and then a learn-by
	265 My soundmaster radio IR6500SW modified – A hack on a radio to make USB-C ↔ USB-C cable possible
​	239 Fully charging hearing aids from power banks – Hvordan lade et høreapparet fra en powerbank (**)
OTHER
213 Et strippet og ombygd voltmeter – A stripped and rebuilt analogue Voltmeter for a play​
​209 My xC softblinking PWM notes – Two old analogue meters shown
​205 Adapting without a button battery – Saving on button batteries
198 A LED string dissected – How does a LED string work?​
​195 CAD/drawing tool iCircuit, Eagle, Fritzing or..? or KiCad or Circuit Simulator
​132 Electronics and building blogs
SOME INTERESTING SHOPS
​Standard disclaimer Electrade, see https://electrade.no/lysdioder_LED.htm – here a LED page. (Thanks, son Andreas, for this url!) Adafruit, see https://www.adafruit.com MIKROE, see https://www.mikroe.com PIMORONI, see https://shop.pimoroni.com Kemo Electronic, see https://www.kemo-electronic.de – like the LED tester. But you need to find a reseller! EIGHT Innovation Ltd, see https://eight-innovation.com/instructions/ – like the tube radio with 14V anode voltage(!?), with circuit diagram! As of 05Nov2025 I don’t know if this company is up and going