Hi there @Rich,

I have ran the multimeter across the switch, which gave me a reading of around 3v, then when I pressed the switch the voltage dropped to varying levels (different each time) for each press (during the depression), returning to about 3v whilst the light was doing each set.

I hope I have done this correct and it is the information you need to help me.

I cannot thank you enough for your assistance with this as my ideas out way my skill, but I am learning.

Martin

Sounds like it's possibly a normally closed switch in that case, which is the other way around to what I had imagined (and hoped).

I'm sure it's still possible to use the EZ-B to simulate a switch push, it will involve me thinking a bit more about it though and right now my brain is fried.

How about a normally closed relay. You can wire the coil of the relay to the TIP circuit and trigger that with the EZB and scripts.

Thanks for all your assistance guys, do you know if there has been a date set for the shipping of the v4 yet?

@mgodsell1973... Anytime in July is the current estimate of Revolution to begin shipping...

Thanks @Richard R, getting very excited now :-)

Hi @Rich, I was wondering how things were going with my problem. I know that you probably have lots on. But I just want to get cracking :-) thanks for your time and assistance.

Sorry, I hadn't forgotten I just hadn't got around to it... or more to the point hadn't got around to sketching it out.

Basically, the easiest way would be to do as Dave said and use a relay over the existing switch (or in place of it).

Use the TIP122 circuit to power a relay (I believe the relay would require the use of the diode mentioned in the circuit).

The relay would be opened/closed by the TIP circuit which would then switch the switch on the light board.

Quick scripts such as;

Set(D0, On)
Sleep(100)
Set(D0, Off)

these would simulate a button push. Change D0 for the port as required.

A quick and dirty schematic...

So it's the simple TIP circuit as explained in my tutorial but rather than feed a lamp it feeds a relay. When the signal is high on the base of the transistor the relay is energised and closes. The other side of the relay connects (or replaces) the push button on the lighting board, when the relay is energised the switch is closed (i.e. button is pushed).

The short script simulates a push of 100ms, you may need to adjust the sleep to suit depending on the board itself. This will be trial and error.