Reading time: 3 minute Among the main topics presented in this issue, we list: Detector for 220Vac / 50hz electrical paths embedded in the wall; Tx and Rx UHF with voice command activation; LM1875 - 20W audio amplifier with low distortion; VT_ series photoresistors; Twilight automatic supplied directly to the 220Vac / 50Hz mains.
Reading time: 4 minute Among the main topics presented, we list: Digital oscilloscope - a channel, for PC; Two-channel remote control receiver; Security systems; Timing presence sensor; Programming alphanumeric LCD displays; Reversible memory counter; Software timers made with C51 series microcontrollers.
Reading time: 3 minute Among the main topics presented, we list: Professional manufacture of printed circuits in our own laboratory - Development of exposed laminate; GPS - How it works; The sound of rain or waves; Dynamic light; RF shock shields and broadband transformers; Transceiver for 144Mhz band; Asynchronous interface for data transfer.
