Hi Mr. Bald Engineer.
If you didn't heard yet, there is a medical device called tDCS which is used to treat some medical conditions for people like me(it is scientifically proven to be working).
So I really need to build a that device. The current market sells this with too damn high price($300).
The device produces constant 1 to 4mA based on users preferences.
I've watched almost all of your videos but couldn't come up with a safe solution. Can you help me for this?
Requirements:
- Constant current of 1, 2, 3 or max 4mA.
- Need a safety feature to prevent more than 4mA to flow.
- Adjustable between 1-4mA
- Need a ramp up and ramp down to reach desired current(no instant current, which bring some unwanted side effects).
- Should stay constant even if the load resistance is changed(LOAD is my brain 
).
Although there are a couple of circuit designs on internet, all of them changes the current based on load resistance. They try to stay in desired current and that is mostly achieved with a little change in load resistance but that is not enough for me since it is my brain we are talking about.
Watching your videos, I though you may come up with the ultimate tDCS circuit because... you know, you are really good with this.
How would you solve this?
