Try to communicate with the dead.
A free-to-use video-conference connection service.
PTComm Manager is an application that links the portable terminal to a host PC.
It's used to control or to receive data from an embedded microprocessor.
PhySim covers ASK, FSK, PSK, QPSK, DPSK, PAM, PWM, PPM, TDM-PAM, PCM, AM, SSB.
