- Published in issue 12/1993 on page 44
Infra-red controlled remote switch
Nowadays, several manufacturers produce ICs that combine an infra-red receive LED with associate amplifier and demodulator. The Type SFH505A from Siemens, used in the present circuit, has in addition a band-pass filter to minimize any interference. It is best used in conjunction with the infra-red transmitter in the next arttele.