Where to find a good (And safe) stereostim tutorial these days?

[memma]

Go to smartstim.com and you get "This board has no forums."
Try to sign up there and the email verification link never arrives in your inbox, despite requesting re-sends.

Most other links near the top of Google results ultimately lead back to smartstim, so aren't much better.

I have a soldering iron, experience with arduino and a small but reasonable budget. I'd like to put together my own stim setup (mostly inspired by this post) to try out with cock heroes and similar.

Where should I start these days?

I've looked at the pinned hardware links on the hardware and teledildonics thread. Some of them are fairly dead or out of date too...

[tckt78]

I've been thinking along these lines as well. I figure Ardurino or Raspberry Pi would have some sort of control that one could give. I've seen some various devices that are utilizing a TENS unit, but running the leads thru the controller for intensity control after you set your tolerance. Not the best solution, but still a solution. Keep us posted!

[Spielers]

to see the content in smartstim.com you need to login first. So create a account to see the content.

[alexfayer]

I have the same problem when trying to register on smartstim. The confirmation email never arrives. I checked spam and junk folder! Also ok the site it is never mentioned on how to write an admin about this problem because you can only message an admin with a confirmed account!

I am also searching for a good layout to build my own estim device. Since BTstim is not producing anymore.

[BoundSquirrel]

I think it's awesome that there's so much new interest in getting into eStim. I'll tell you this; it's a long learning curve. It's not steep, but it's long. I almost gave up a few times because it didn't feel as good as I had hoped. After getting the right box(es) and the right electrodes (I have a drawer full of trials and errors ), I've finally landed on a good setup for me.

So, here's my guru-ly advice for boxes:

I have a soldering iron, experience with arduino and a small but reasonable budget. I'd like to put together my own stim setup (mostly inspired by this post) to try out with cock heroes and similar.

Where should I start these days?

I don't know what your version of a small but reasonable budget is, so modify this all as needed.

If you want to get a plug and play device, and $400 fits your budget, the 2B device is as simple as it gets.

https://www.e-stimsystems.com/index.php ... 0&page=all

Now on to the cheaper (and in this case, cheaper does not mean worse - it means different) DIY devices.

Midistim box:

I've put the schematic for the Midistim box here:

Midistim schematic

This is pulled right from the smartstim post and, when followed correctly, works great. The parts list listed on that same post is woefully out of date so here's what I used:

Amplifier:
https://www.amazon.com/SMSL-SA-36A-Digi ... 434D8ZJEA6

Transformers:
https://www.amazon.com/gp/product/B001M ... UTF8&psc=1

Resistors:
https://www.amazon.com/gp/product/B00NQ ... UTF8&psc=1

These are listed as unavailable, but there are a bunch of alternatives that should work. Just type, "25 watt 3.9ohm resistor" and you'll find plenty of options.

Housing:
https://www.amazon.com/gp/product/B005T ... UTF8&psc=1

This got surprisingly cramped when everything was wired. I would not go any smaller.

Banana plugs and jacks:
https://www.amazon.com/gp/product/B07PJ ... UTF8&psc=1

These sucked. They're cheap and a pain to work with. I do not recommend.

The whole setup cost me just under $100. The biggest expense is the amplifier. I have no idea if there's a cheaper option; I went with what was recommended.

You can also make a Davy box. There are schematics out there, but it's very similar to the Midistim but uses a cheap pair of powered speakers (can pick them up at a resale or thrift store for a few dollars) as the amp and leaves out the resistors. I think I built my first one for less than $20. If the midistim is in your budget though, I'd go with that - the sensations are much smoother.

The difference between the 2B and the DIY boxes is that the 2B has advanced processing for handling incoming stereo sounds. This prevents sharp sounds from hurting you; basically it's got built in dummy-proofing to keep you from getting hurt trying to stim to your favorite rock album or porn video. If you're building and using a DIY box, the sound you give to the DIY box gives it right to your electrodes. If you send a sharp sound, it passes that on and, OW!

The problem is that, sometimes sharp painful sounds are part of a tease or CH video. The 2B processes this down to what it decides is a manageable sound, kind of taking the threat or anticipation of pain/punishment out of those experiences. It also mis-processes some sounds and can actually cause unexpected variation - I found that out with some of my recent CH audio files. The 2B actually made those files more painful (not my intent!).

That should get you rolling towards your first stim device. I'll put up another post on electrodes soon.

[lolol2]

Here are also some great informations:
https://www.reddit.com/r/estim/wiki/index

[memma]

to see the content in smartstim.com you need to login first. So create a account to see the content.

Try to sign up there and the email verification link never arrives in your inbox, despite requesting re-sends.

...we'll ignore that...

That should get you rolling towards your first stim device. I'll put up another post on electrodes soon.

Give that squirrel a medal.

Here are also some great informations:
https://www.reddit.com/r/estim/wiki/index

Give that man one too, er, two: one for the good link, and one for this, which shall act as my incentive to put together a setup. Thinking probably a midi stim at this point... I'd consider a 2B if it had the option to bypass the 'dummy-proofing'. Generally I'd leave it on as I don't trust myself not to do something silly, but when it comes to something like a CH, I'd like to play it 'as it was meant to be played'. On that note: What did you playtest this on, lolol2?

[CumScream]

The difference between the 2B and the DIY boxes is that the 2B has advanced processing for handling incoming stereo sounds. This prevents sharp sounds from hurting you; basically it's got built in dummy-proofing to keep you from getting hurt trying to stim to your favorite rock album or porn video. If you're building and using a DIY box, the sound you give to the DIY box gives it right to your electrodes. If you send a sharp sound, it passes that on and, OW!

The problem is that, sometimes sharp painful sounds are part of a tease or CH video. The 2B processes this down to what it decides is a manageable sound, kind of taking the threat or anticipation of pain/punishment out of those experiences. It also mis-processes some sounds and can actually cause unexpected variation - I found that out with some of my recent CH audio files. The 2B actually made those files more painful (not my intent!).

Hmmm, this sounds interesting...
@BoundSquirrel, can you share a mini guide on what input signals the 2B will take that translates into pain signals?

I know a few people in this community have wanted to find a way to balance the popularity of the 2B Systems, with tease files that can be equivalent to a raw sound signal processor.

I also wish we could just turn this off as a setting, when we trust a tease source, but not found out how yet.

[throwawayacct]

Hmmm, this sounds interesting...
@BoundSquirrel, can you share a mini guide on what input signals the 2B will take that translates into pain signals?

I know a few people in this community have wanted to find a way to balance the popularity of the 2B Systems, with tease files that can be equivalent to a raw sound signal processor.

I also wish we could just turn this off as a setting, when we trust a tease source, but not found out how yet.

Not @BS, but I can tell you the 2B is unlikely to be a good device for sending pain signals. Often the kinds of stim signals that induce pain response, are very quick, sharp, abrupt changes in frequency or volume. The 2B processor is designed to filter all of that out and limit frequency.

Turning it off is something the manufacturer is really unlikely to implement; from forum posts and their general demeanor when discussing the latest firmware versions, they are particularly invested in the processor function as "their baby". There is also the question liability and getting the appropriate certifications from CE or UL for a device like theirs with a "open" switch.

[MegaErato]

@Memma although the 2B is an easy and quick way to get into Stim, building your own midi stim stereo estim device with the transformers and resistors linked by BoundSquirrel will ultimately feel a lot better and give you a wider range of sensations. It takes some tenacity to build, but if you are like me and you have ZERO electrical knowledge but still wanted to make one, you can. I made a simplified visual schematic for myself back when I bought my most powerful box yet. I'll post it here in case it helps you in the journey. Its basically a midi stim but I used a really cheap amp off Ebay that is readily available and is used by many stimmers (TDA7297): https://www.ebay.ca/itm/AC-DC-12V-TDA72 ... 4b77701c45

JC stimbox drawing2.jpg (95.08 KiB) Viewed 9242 times

Good luck with the build!

[lolol2]

which shall act as my incentive to put together a setup.

What did you playtest this on, lolol2?

I would recommend to get a device or cables/electrodes that allow a triphase setup.
So connecting the common from both channels to the same electrode, commercial devices mostly have additional cables for that.

Triphase setups can produce stroking effects better than having two independent channels.
But there are files for both kind of setups, so having a unit that supports both is what I would always recommend.

I have a self build stereo box which using a "normal" amplifier, so no audio processing.

On the picture above from @MegaErato you can see a classic triphase setup, the both common black cables are connected to one channel.
Actually every device should be able to run in triphase mode when you have two independent channels or lets call it stereo.

[redgreencolor]

@MegaErato Can you please put the ebay links for the transformer and for the R1 and R2 resistors in the photo above?
Thank you for your help

[MegaErato]

@MegaErato Can you please put the ebay links for the transformer and for the R1 and R2 resistors in the photo above?
Thank you for your help

no prob!
transformers I used (you need 2, one for each channel):
https://www.ebay.com/itm/RT-702510-Line ... 2714853358

Resistors: 4 total resistors between the amp and transformers --
2x : 15ohm , 5w (R2 and R4) ( just search that to find many parts listed in many websites, but its even cheaper if you just find them at a local electronic parts store) :
https://www.ebay.ca/itm/15-Ohm-5-Watt-5 ... SwDy1eP2Je

and 2x: 5.6ohm , 10w-- (R1 and R3) Like here: https://www.ebay.ca/itm/5-6-Ohm-10-Watt ... SwjCle8yVO

also for the record, I tried many of the colored outputs, and the final one that worked best for me was the purple line outs --I dont remember their associated number-- (not the blue 2.5W that the pic shows) if you buy those exact line matching transformers it should be quite easy to follow the wiring I labeled otherwise.

[redgreencolor]

@MegaErato Thanks for your help.
I need to choose an ac-adapter that is safe.
In the Midistim scheme, it is advisable to choose an Agency Listed double insulated AC-adapter 12 V DC (min 4A).
I found this on amazon.es:
https://www.amazon.es/dp/B001W3W12E?tag ... th=1&psc=1
Do you think this ac-adapter is safe, or do you suggest another?
Please if you suggest any ac-adapter, put links from the european amazon because i live in europe.
Thank you for your help

[hosenguy]

My credentials. Electrical Master Electrician, holder of FCC first class communication license, have acquired UL and CE approval for numerous equipment used in communication and control equipment, have 2 DIY estim devices.

This is as good as it gets for line powered power supplies. It has all the correct approvals and if it is really made in Germany it is better than the China ones.

enjoy