I’ve got the power (supply)

So after the training the other week, I feel fueled up to do more electronics, constantly faffing around with the power on Arduino is really frustrating, as it appears to be able to deliver very little grunt when its powered by USB, so the minute you have anything interesting connected, the +5V is down to more like +4V, not good. Did some googling for a bench power supply, and without wanting to take out a mortgage for a TTI or HP supply, those lovely folk at Farnell came to the rescue in the form of the (seemingly well respected) Tenma range…

After a bit of buzzing around on YouTube, the reviews seemed good (it appears to be a re-badged “Korad” unit) and it was available in many flavors – single, twin and triple output versions with varying degrees of destructive power… The price sweet spot for my application appeared to be the Tenma 72-10495, which is a twin output 0-30V 0-5A unit, for just a shade over £120 before VAT and delivery, I opted for twin output as its nice to be able to provide 5V and 3.3V at the same time, or 5V and 12V etc. Placed the order, got the unit two days later (it was near midnight when I placed the order…) in perfect condition, delivered by the worlds brownest couriers, UPS.

Tested its outputs against my (old but trusty) calibrated Fluke 8010A meter, and it all shows nicely to within 0.02v, so I’m happy with that for a sub £150 power supply! The question now is what projects do I start to power with it, or more pertinently if I can’t come up with a good project, what scrap electronics do I blow up with 30V 5A DC?

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