Archive for August, 2016:


I ordered a few toroid cores today, and I used this to find the turns and inductance for some cores. It has a basic calculator that can give the information for the cores in the list. Most of the cores were chosen for RF projects, so some very large cores are shown. The T

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2016-08-20 Blue Blinky Gets A Different Timing Capacitor

It has been a long time since I designed Blue Blinky; I just wanted to update it.  I have used a 1 uF electrolytic capacitor for the timing capacitor, and it works just fine with the two 680k resistors to give about 1 per second flash rate. I got a bag of hundreds of multilayer

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