Circuito digital puro a 5 V con un único pulsador para avance por toque corto, confirmación por toque largo de 2 s, visualización de 4 opciones por LED y transmisión DTMF mediante HT9200A.

Rebuilt two-layer PIC16F628A DTMF relay audio switch with 12 V input, MT8870 decoding, PIC16F628A control, relay driver, and audio switching path.

Welcome to your new project. Imagine what you can build here.

A simple voltage divider to showcase how to make parts. A voltage divider is a simple circuit which turns a large voltage into a smaller one. Using just two series resistors and an input voltage, we can create an output voltage that is a fraction of the input. Voltage dividers are one of the most fundamental circuits in electronics.