Hi.
I use the open collector outputs of K8061 to control the K8006 light system. Is there anyway i can pick up an analog signal from the K8006 that corresponds to the present light intensity for a specific channel?
Any suggestions?
Best regards,
Renato
The K8006 is a one-way (input only) system, so there is no feedback.
Ok. I have an idea that might solve the feedback issue. If I add a transformer/rectifier with output 0-10V DC to each channel of th K8006 i could use that as input to the DA of the K8061.
Would that work?
I appreciate comments and/or suggestions.
Theoretically this looks like a good idea. However, practical realisation will probably generate all kinds of problems which you will have to solve along the way. Furthermore, the accuracy of the feedback you will generate will probably be very poor. Anyway, be extremely carefull when working on live AC equipment.
Thanks for the comment. I tried this solution and it works. You’re right about problems along the way. I built a graetz transformer/rectifier with an output of 0-10V. I had to add a capacitator (2200 uF) to the DC part of the rectifier to get stable DC output.
Now I have another problem. When I turn on the lights to full bright the circuit reacts promptly and the K8061 gives me a corresponding value. The problem occurs when I turn off the lights. The AD of the K8061 counts down slowly and gives 0 in value after 15 seconds. Is that because the capacitator is discharged slowly or is the AD of the K8061 slow? Would it help adding a load (resistor) to the transformer/rectifier in order to discharge the capacitator faster?
/Renato
The capacitor is discharging very slowly.
Add a 470 ohm resistor in parallel with the capacitor. Then the time constant is about 1 sec. The capacitor will be discharged completely in 5 sec.