Johnson's Techworld

An operational amplifier gets its name from the original use of opamps in analog computers for mathematical operations. Op amps typically have two differential inputs and a single

555 IC was one of the earliest integrated circuits to be marketed, as early as 1971. By 1972, there were five companies manufacturing the 555 IC and it

Sometime back VU2TUM had mentioned that it is possible to trigger 10m repeaters in Australia from our region and that VU3FWG had been successful in that. Yesterday I

Many of my friends regionally and globally are eagerly waiting for Hamfest India 2024 to be held at Kolkata on December 14th and 15th. It will be a

This image was posted by the ground team of Amateur Radio on International Space Station yesterday on X. It was reposted by a lot of amateur radio satellite

Testing LED with a multimeter is a bit different from testing rectifier diodes with a multimeter.

Now that many of us use commercial radios, band pass filters would be there or you expect them to be there within them. In software defined radios, there