Category: Electronics

Misc Dot Welder Part 1

I posted last about a giant recumbent bicycle build. In that post I mentioned that I built a welder. Well, I’m ramping up to build another recumbent. So that means we need another welder. And at first I was going to build another welder, but then I discovered Offerup.com. Offerup is how I got some …

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Diagnosing Car Battery Trouble, the Geek Way

On a recent trip to go see Weird Al’s Ridiculously Self-Indulgent, Ill-Advised Vanity Tour (which was amazing by the way!) I had some car trouble. My Corolla just would not start. Sometimes it did fine, but other times, it simply refused to turn over fast enough to start. Getting Home with a dead battery Being 250 miles …

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Time Lapse Camera with the Raspberry Pi Zero W: Part 1

Today we’ll talk about using the Raspberry Pi Zero W to make a Time Lapse camera that can also be used for home security.  But first, I’m going to get a little meta with The Blog. I haven’t been posting a lot on The Blog lately, mostly because I’ve been quite busy with Real Life. My …

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Dual Band BITX40 Project Update

I’ve written about putting together a dual band BITX40 in the past and the methods I used had varying success. The idea was to augment the built in filters with switched in/out add-on filters from QRP-Labs. This is a sound idea, but the layout of Low Pass Filter on the BITX40 really didn’t allow it …

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A Simple 5v Power Supply for Arduino, U3S and more

Many electronics experimenters and builders take the lowly 7805 regulator for granted, and we pop it in a circuit without a second thought and move along. But for beginners who are wondering how to power their Arduino or other 5 volt project (such as the QRP Labs U3S) from a 12v-13.8v power supply, the 7805 …

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