MrDEB
Well-Known Member
Been looking at revamping a Pinewood Derby finish line unit by using IR instead of a bright light and photo diodes or ?.
Problem is the present unit will false trigger sometimes due to ambient light etc.
planning on putting the IR emitters in the track and dectors in covered bridge.
Do I need to pulse the IR keds?
looking at some narrow angle leds from Reynolds electronics tsal7200
has a 17degree angle and 920nm?
Have seen lots of circuits that pulse the IR leds at 38gzh or so but is this nessary?
Also the dectors Reynolds has have 3 leads on them insteadof just 2?
want 12-14" disance from track to bridge.
Problem is the present unit will false trigger sometimes due to ambient light etc.
planning on putting the IR emitters in the track and dectors in covered bridge.
Do I need to pulse the IR keds?
looking at some narrow angle leds from Reynolds electronics tsal7200
has a 17degree angle and 920nm?
Have seen lots of circuits that pulse the IR leds at 38gzh or so but is this nessary?
Also the dectors Reynolds has have 3 leads on them insteadof just 2?
want 12-14" disance from track to bridge.