Johnson's Techworld

Today morning VU2HSM announced the Vadakara Ham Meet 2026 during Charminar Net on 7080 kHz. Last time it was conducted in 2023 and plenty of amateur radio operators

I asked Google AI whether there is any advantage for analog multimeter over digital. Analog multimeters are supposed to be better for visualizing rapid changes and providing real-time

Well, I had not heard about them, though I recently posted on the possibility. Then one of my online friends told me that there is plenty of material

I had bought a 180W Monocrystalline PERC solar panel to build an off grid power supply for my ham radio shack. It was not giving good results as

Maximum theoretical power conversion efficiency of a full-wave rectifier is 81.2%, while that of a half-wave rectifier is 40.6%. Remainder is lost as heat, mainly due to the

I was using a quarter century old linear power supply for my IC-2730A radio for Low Earth Orbit satellite operations, mostly through the Amateur Radio on International Space

Some time back I had posted about the popular 7805 Voltage Regulator IC and also demonstrated Voltage Regulation with IC 7805. That is a simple linear regulator. They

This offline UPS for my computer became a surplus item when I moved from desktop to laptop computer. It has been here for quite some time and battery

The output signal of a CE amplifier will be:a) 45 deg out of phaseb) 90 deg out of phasec) 180 deg out of phased) 270 deg out of

Though it is named as a ‘Selfie Stick’, I am not going to use it to take selfies! For me it is camera tripod and possibly a tripod