Johnson's Techworld

Terminals of the 555 Timer IC are numbered starting from the left side of the notch as shown in the image. There are a total of eight pins

A simple way to classify digital ICs is based on the number of logic gates or components. Small Scale Integration or SSI contains about a dozen components. Medium

Pass direction of OBJECT AE with Catalog # 63238 on N2YO.COM, 19 Aug 2025, 10:25 IST (UTC+ 5.5)63238 corresponds to TEVEL2-7 on SatNOGS. Tried with my Moxon Yagi

CRGO stands for Cold Rolled Grain Oriented steel. CRGO steel has high magnetic permeability and low core losses and hence useful for making transformers. It is made through

Commercial radio which can go all the way up to 10 GHz band for the Geostationary Amateur Radio satellite QO-100. When will I be able to satisfy my

Ladder Line is a balanced feedline with low losses compared to a coaxial cable. Here is the method of homebrewing one using insulated copper wires, nylon ties and

This silicon tape can be used to waterproof antenna feedpoint and balun! We bought this silicone tape from Amazon: https://amzn.to/44qVBfE. Please note that if you buy from this

When I started as a short wave listener in 1970s, I was using a Philips Prestige vacuum tube radio. It had a beautiful tuning indicator with a green

Ladder Line is a balanced feedline with low losses compared to a coaxial cable. Here is the method of homebrewing one using insulated copper wires, nylon ties and

UPS or uninterruptible power supply is commonly used for desktop computers. Laptop computers have their own built-in battery so that a UPS is not needed. You can use