Inside a mechanic’s test probe – with schematic
A very simple, but extremely useful 6-24V test probe that can detect polarity and force energise circuitry in either polarity…
Inside a fuel injector tester with schematic
More information from Andy Brown. The reason the coil is driven with two voltages is not for reducing power dissipation.…
pandemic theatre usb sterilising dongle
Since proper UVC sterilisation of a surface requires a decent output power and exposure time, I'd rate this dongle as…
Hard cider vs sodastream – will it carbonate?
Making trash cider even trashier. Truly the champagne of the working class. Also full of appley vitamins and minerals essential…
Inside an nvr no volt relay
An NVR (No Volt Relay or No Volt Release) is a safety device commonly found on most workshop equipment, that…
Flux and carnival games loud 8-bit noises!
Filmed on the fly while travelling, so will look and sound very different. Further to discussion on a live stream…
Huge 30w ceramic core led light with schematic
One correction to make. I said and wrote 220uF for the main capacitor instead of the actual value of 22uF.…
Skeleton shaver with weird charging circuit
A detailed look at a "skeleton shaver" from various online sellers, with some VERY weird charging circuitry. I'm not sure…