LPTEL, telephone ringer repeater, light bulb, Amedeo Valoroso, SIP, telecom, telephone line

LPTEL, telephone ringer repeater

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 - […]

STROBO, Amedeo Valoroso, xenon strobe light schematic, PC controlled, light controlled, sound controlled

STROBO xenon stroboscopic lamp

STROBO is the project of a xenon strobe lamp, which I made when I was a boy. The lamp can flash independently, at a setable frequency, and moreover it can also be controlled from the PC, a microphone and other lights, through modules [...]

SPTEL, sip line detector engaged, assembly, Amedeo Valoroso, busy telephone line indicator

SPTEL, committed phone line indicator

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 [...]