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Hi All. Before my first use of X10. System could be two time clocks with four circuits into a TMA4 at the remote end and four AD10 in a control panel. Q1 Do I need to program these devices? As I understand it the TMA4 is supplied coded A1 - A4 and I can set A1 - A4 on the AD10s. Q2 There will be an ...

Hi Peter, Consider one of those switches that you telephone to switch ON/OFF. Use with one of the other circuits suggested for low limit. No need for HA yet!

Malcolm

Hi Jfn,
Seems to me you may not have enough mA on the CNY70 emitter.
Data sheet for emitter IF 50mA VF 1.25V.
So 5 - 1.25 = 3.75V / 470 + 7.9mA
Try 150 ohms to get 25mA.
This may reduce the sensitivity to stray light & distance.
Malcolm T G3TCG