There is a device in work which has different alarm outputs for different alarms. (Output is simply a switched relay) The alarms are - High Alarm (AUX 1 = 12v) Low Alarm (AUX 2 = 12v) Probe Error (AUX 1 + AUX 2 = 12v) System Hang (AUX 1 + AUX 2 + ALARM = 12v) However, the voice dialler has 4 inputs (Each input would read a different Error Message) I've managed to get it working fine using 5 SPDT relays (I'll be using 5x 12v car relays) However, the SD1+ Voice Dialler can be extremly picky, I'm worried that if one of the relays switches slower than the other, I might get a false pulse to one of the outputs on the SD1+ So, what I'd like is for each of the outputs A,B,C and D to have a small delay, I.E. 5 seconds or so before they switch. From my rusty Electronics experience (I can't believe i've forgotten A-Levels already!) I know a basic delay circuit can be made with a Resistor and Capacitor, can someone please help!!?! Ta
a resistor in series and a cap across the supply lines should help you out. Higher resistor value & larger cap = longer delay and vice versa.
