Skip navigation
The other day I was reading a blog by raspjoenoob   about trying to run a Raspberry Pi with a USB Power Pack.   USB POWER BANK // PORTABLE POWER SUPPLY  Later the same day I was in Walmart where I noticed they had 2200 mAh Power Packs on sale for $5.00. I bought 2 of these with the intention to test them to see just how much power they would actually deliver.   A while back I built a little battery duration tester that is used in conjunction with a Load Unit to t ...
     It isn't uncommon for me to find myself in need of a Pulse Width Modulation (PWM) signal in some of my bench experiments. Up until now I have put together a breadboarded PWM generator and modified it to suit my needs. The results always looked like this:          This project will be to design and build a board with the flexibility to cover the majority of my needs with respect to PWM under experimental conditions. Here are my list of req ...
Quite a while ago I blogged about this Tectrol 1 kilowatt power supply that I obtained from a piece of medical equipment.   Thing of Beauty   Since then I have tried to think of a use and also tried to sell it on Ebay all to no avail. Once again I was thinking of salvaging it for parts but in the end I could not bring myself to destroy it.   I dedicate this blog to the Tectrol Engineer or Team of Engineers that designed and built this Work of Art. The Tectrol company has sin ...
There are many times, when I am working on an experiment or project using my bread board, that I want to monitor the voltage at different points in the circuit. This usually involves setting up a couple DVMs and running test clips into the proper positions on the board. This can be messy and inconvenient. I got the inspiration for this shop tip when I saw these small 2.5 volt to 30 volt LED meters on a China Dollar Store site for $2.75 each, including shipping to the shop. I bought two ...
This is one of the most common introductions that we find from new visitors to the Element 14 web site. Inspirational programs like Ben Heck, Instructables, and many others are doing a good job of catching people's attention and interest. With each newly arrived member, we poke and prod to find out more about you and what basic knowledge you already have as well as what exactly are your interests and goals. You see, there is no one simple answer or formula that will fit everyone. You and your in ...