Thinkpulse with Ganglion board ?
lucasbaldezzari
Uruguay
Hello, how are you? I was wondering if there are any chance to use the Thinkpulse active electrodes with ganglion board.
The Thinkpulse electrodes in the original adapter for Cyton board are connected to 5V, can I use the 3V from Ganglion Board to connect the Thinkpulse electrodes and use them with the Ganglion?
Thanks!
Comments
Lucas, hi.
The Shop page,
https://shop.openbci.com/collections/frontpage/products/thinkpulse-active-electrode-kit
Explicitly states for Cyton + Ultracortex only. Additionally, the kit contains a power supply board, which only mates with the Cyton pins. Thus that power board is incompatible with Ganglion. Cyton supplies both AVdd, AVss voltage pins, and this + - pair are missing from Ganglion.
William
To be certain, I'm going to mention the ThinkPulse creator, Julien, @julienConscious . He might reply in this thread or you can also click on his name above and sent him a Private Message with the button. I'm unclear what are the voltages required by ThinkPulse, and if it can work without the scale adjustment feature which is present on Cyton. For example it may be possible to use some type of external voltage regulator / battery hookup that would satisfy it's requirements. But also note, such ad hoc arrangements might subject the ThinkPulse electrodes to damage if miswired, and thus ineligible for warranty replacement.
William
Hello @wjcroft, how are you? Thanks for your fast reply as usual.
As you said, only the Cyton has the connectors for the Thinkpulse. The voltage is 5Vbetween AVdd and AVss. I was making some tests with the Cyton and the Think pulse.
But I can make an adapter to connect only 2 or 4 thinkpulse for my application. But I don't know if it is possible, I don't know if the AVdd and AVss could supply the power for the Thinkpulse. About a regulator/battery, yeap, could be, but it is more complicated, but if it is the only way, I think I will use that.
Thank you, @wjcroft. I will wait the Julien response.
Regards,
Lucas.
You can also PM Julien as suggested.
I'm not sure what you are referring to, "...I don't know if the AVdd and AVss could supply the power for the Thinkpulse..." I don't think you would want to have the Cyton sending voltage over to your Ganglion / Thinkpulse setup. That sounds risky.
Ok, I will PM to Julien.
What I try to say is that the Ganglion has a 3V between AVdd and AVss, but, I dont know how much every Thinkpulse is consuming (en mA). I think the consumption should be small, a few miliampers, but I don't know. Like you said, could be risky use the Ganglion only, but it would be great if we can use the ganglion supply in order to use the Thinkpulse. Perhaps the Ganglion can deliver enough power to feed up to 4 Thinkpulse.
Regards,
Lucas.
Hi Everyone,
as mentioned in PM to Lucas, in theory the input voltage 0-3V provided by Ganglion is compatible with the amp used in TP sensors but we have not performed a test to validate that. It is on our to-do list tho, since we would like Ganglion owners to be able to benefit from the TP as well. As mentioned also, the connectors are not positioned the same way as Cyton but there are workarounds for that. We will keep you posted if we have more info on that. Best, Julien
Hello Julien, how are you? Thanks for your reply.
I will test them. I only need two PM connected to the ganglion.
I will post information here.
Regards,
Lucas.
Hello guys, how are you?
I tried to use the Ganglion Board with one Think Pulse Active Electrode and everything works fine. I only used one electrode because I have only one AVG and AVD connectors. So, I will print a pcb board in order to connect up to 4 channels and I will let you know the results.
Regards,
Lucas
Thanks Lucas for the info: let us know about your further tests!
Best
Julien