Johnson's Techworld

USB printer cable has type A connector on one side meant for the computer and type B connector on the other side meant for the printer. The same

I had posted a query on X asking for the best amateur radio logging software, thinking that there may be only two or three out there. To my

Yesterday I had posted using an example code in Arduino IDE to make an LED on and off every second. Today I found a way to edit the

Even though I have not learned coding, I have completed the first step in using Arduino Nano.

FPGA stands for Field Programmable Gate Array, meaning that it is an integrated circuit which can be reprogrammed after manufacturing. Field programming means programming outside the manufacturing facility

Pin connections of the popular 555 timer IC. Pin sequence is identified using the notch as a marker.

After a lot of effort I have finally achieved SWR of 1.1 for my loaded coil dipole antenna for 80m. Currently it has 12.5m wire on each side

I tried to make a loaded coil dipole antenna for 160m and ended up having a reasonable SWR at 80m! Current configuration is 12.5m of wire before coil

Usually, we tune dipole antennas by folding back terminal ends so that it is easy to restore previous length if needed. Same strategy does not seem to work

160m was the lowest radio frequency band allocated to radio amateurs before the adoption 630m and 2200m bands by many countries in the beginning of 21st century. It