[Klaus] wanted some sort of aid for parking his car, and after running across a $4 ultrasonic sensor, decided to build his own speaking distance sensor (.de, Google Translation). Inside [Klaus]R…

Схема конструкции транзисторного усилителя мощности для работы QRP на КВ диапазонах

Power Supplies: I love simple circuits. These power supply circuits will probaby be the most simple curcuits you will build but they can be the basis of some really neat projects.