Selfie Canon?

Preamble

I saw a Canon Selphy CP 760 for sale for 50 baht in a street market on Sunday, in Yu Chareon, just off Ratchada Soi 3

However, it had no supply supply, 24V 2.2 A. By luck, I managed to find a Canon power supply brick CA-CP200 B, 24 V which supplied 1.8 A. Obviously not the correct rating, but close enough to test the printer. Continue reading Selfie Canon?

Optimate charger

Preamble

I have two Optimate chargers, a Honda 3+ and a Optimate 4, and finding the online manuals is a bit of an issue. This is because fo the poor rebadging and renaming system. Optimate was sometime Accumate, and the Honda 3+ isn’t necessarily the same as the Optimate 3+ (although I am not sure what the exact differences are). Ridiculous, I know. Anyway, here is a collection of the links that I have found.

Continue reading Optimate charger

Infra Red temperature sensors

Preamble

I was looking for an Infra Red thermometer to measure the heat on my solar PV panels and for checking my 3D printer. Whilst tempted by thermal imaging cameras, I was somewhat put off by the £2000-3800 price tag. So, I opted for the cheaper gun like tools. However, there are some DIY options that I will briefly look at first.

Continue reading Infra Red temperature sensors

How does a frequency to voltage converter work?

Preamble

This was my answer to the question, How does a frequency to voltage converter work?, which was on Stack Exchange Engineering.

This is straight from the horse’s mouth, so to speak, as this is copied verbatim from What’s All This Frequency-To-Voltage Converter Stuff, Anyhow? by Robert A. Pease, the guy who designed the LM131 for National. A PDF is available. Continue reading How does a frequency to voltage converter work?