Stupid knight rider led strips strobe warning
20 different and stupid patterns spoil these "Knight Rider" LED strips. But the multilayer flexible PCB is interesting. 2PCS Red…
Car music rhythm lamp on lurid pink leather
Electroluminescent VU meter for your car's rear window. Car Sticker Music Rhythm LED Flash Lamp Light Sound Activated Equalizer 45*11cm…
Royer oscillator inverter with output capacitive dropper
Adding a capacitive dropper to the output of the DC to AC inverter.
Playing with: 12v dc to 220v ac inverter royer oscillator
Seeing what comes out of a DC to AC inverter. DC-AC Inverter 12V to 220V 35W Boost Step UP Power…
Julian’s postbag: #67 – inverter, crap meter sealer, schottky diodes
Electronics stuff bought on eBay - some good, some bad. Become a Patreon patron and support Julian's Postbag videos on…
Reverse engineered: 50p electronic 555 doorbell kit with schematic
Understanding the electronic doorbell circuit.
Ebay cheap: $0.75 electronic doorbell kit ne555
A very cheap electronics kit bought on eBay for just 50p. It makes a nice two-tone sound. But there were…
Diy supercapacitor: business card version – success :
My version 2 electric double-layer capacitor is a success. It measures 64uF on my DMM. Yay!
Diy supercapacitor: tart tins version – fail :
It started well, but this homemade capacitor only worked once, then failed.
Electronics to go: smokin’ bicycle lights
Smoke and fire (well not fire) when I overvolt these cheap bicycle lights which have overstayed their welcome.