Do you remember BBS? If you're a fan of retrocomputing, you've probably heard of Bulletin Board Systems (BBS). Before the spread of the internet, these digital networks allowed users to communicate, exchange files, and even play online games. At Varese Retrocomputing [...]
LPTEL è un ripetitore di suoneria telefonica: accende una lampadina quando il telefono sta squillando. Si collega alla linea del telefono, per cui è indipendente dall'apparecchio telefonico. Ripetitore di suoneria telefonica, componenti R1 - resistore 47 ohm 1/4 WC1 - […]
SPTEL is a busy phone line detector, which I designed when I was just over 15 years old: it is an LED that lights up when the phone line is engaged by a telephone in conversation. This my [...]