More Weeder Funnies

[George Handley]

James,

I have a temporary exhausted all I can do on the Weeder digital output board project until I get some new parts.

I certainly did learn an entirely different way to hook up a board using the negative side for switching.

I have gotten all the eight cameras working from the WTDOT board  through the relay board when I believe I accidentally burned up the WTDOT board by shutting the two boards together. Unfortunately, I must’ve touched the plus terminal in the process. I’ll have a new have a new one arrive by Friday.

In the meantime I have another peculiarity about the relay board that you had me change back to that I remember I had this problem before.

I have some of the eight  relays stick on after power is removed and can’t help but think that I must have a bad relay board too. Does that sound correct?

I have another question for you while I wait for these parts.

Another project requires your  instruction.

Terry says that I should be using his Digital input module for some of my sensors even if they don’t have any voltage on the line.

My question to you is do they hook up the same way as you told me the digital output module works. In other words do they switch by the negative side as well?

If they do, I don’t understand how you do it as there is no relay board to power and everything is connected directly to his input board.

It seems to me that it should hook up the way as the WTDIO that would use the positive side for switching.

Either way I’ve tried both and I can’t get it to work.

In Terry’s instructions there are all sorts of paragraphs about programming his boards with his software before you  use it.

It also seems that the memory he uses is volatile and that if you have a power outage you lose all the programming which I can’t imagine him doing, but I’ve read it twice so I guess that’s the way it is.

Your instructions located in one paragraph on your website as well as Terry’s indicate that again I would turn a point off to really turn it on and vice versa. I’m getting an output voltage on the points of about 4.7 V DC  in the off position and 12.7 V DC when turned on.

His specifications states that for a low condition it’s -40 V to 8/10 of a volt and a high position is +4 V to 40 V.

With my meter readings that seems to present a problem. How do I fix that?

In any event I still can’t get it to work and I’m wondering if there’s an additional mystical trick to make it work like the digital 
Output board using the negative side for switching.

In this case I’m directly connecting the cold contact switch  wires to the switch terminals of PIR‘s and magnetic switches.

What is the secret of  getting this type of Weeder board working?

Thanks in advance,

George

Sent from my iPhone