2025-09-04 (Th) BonfireLaserTag Regulator kerfuffle

I needed a buck-boost regulator for my tagger to convert the 3.7V lithium battery to the necessary 5V. My stock of voltage regulators was vast, and I thought I had some step-up models, but when I investigated, they were all step-down. I thought they might be usable, so I soldered header pins to the demo boards and test leads to a voltage readout and a battery holder. The three I was interested in were all unusable for the tagger. I considered rewiring the batteries to be in series, but I liked how I could operate with a single cell. I had one questionable step-up model that was intended to use a micro USB port for power. However, I connected the battery anyway, and I saw 5V on the output when I adjusted the onboard potentiometer. I installed it into the tagger, but I had the power leads backward and fried the module. New buck-boost regulators were arriving shortly.

Three step-down regulators and a buck-boost converter

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2025-08-18