[RELEASE] E-Stim Fantasy

[jgrants]

I will comment back on E-Stim Fantasy and not the hardware.

The section where Caprice removes black tape from her nipples is INCREDIBLE. It feels she is trying to pull my dick off

[digitalparkinglot]

I will comment back on E-Stim Fantasy and not the hardware.

The section where Caprice removes black tape from her nipples is INCREDIBLE. It feels she is trying to pull my dick off

I like that too. I found that stim file and then found that clip of Caprice and thought they worked perfectly together. I think it feels just like she is pulling the tape off my cock. I dread it, but I also love it.

-digitalparkinglot

[book_guy]

Jeez complicated. I'd be too scared of zapping off my dick.

[Afapp]

Jeez complicated. I'd be too scared of zapping off my dick.

Don’t knock it until you have tried it! It’s a steep learning curve, a little steep initial expense. But the experience is great.
That particular section with Caprice and the electrical tape is a little challenging 75% great, and 25% rubbing your head after you cum.

[kksavas]

I orderd now the 2b system, PES slim jim, a new plug and a smaller chastity device ^^
im excited ^^

[CantoFan123]

I just wanted to share my safety concerns.

Hi Mantrid, Thank you so much for posting this useful safety information. I think both the HP filter & the TVS diode make total sense. This video and the rave reviews it's been receiving have convinced me to give estim a try. I have a few questions about the setup I am hoping you might be so kind as to answer:

1 - I took some circuits classes back in college and wanted to double check the cutoff frequency in your calculations made sense, using this calculator (http://www.learningaboutelectronics.com ... hp#answer1). However, what I am unsure of is what is the resistance value I should put into the calculator? Is it the resistance of the transformer plus the resistance of the series resistor? Using your suggested components the resistor is 4.6Ohm, and the diagram provided in this thread suggests using the 8Ohm taps on the transformer. Would this mean I should enter 12.6Ohms? 
2 - I tried searching on digikey but there are thousands of options. Any chance you could be so kind as to provide a link to the TVS diodes and capacitors on Digikey or some other USA source for those of us in the USA who are less technically savvy? I found the following on Amazon but think I am getting ripped off since they're charging 10x or more what your links show. 

[CantoFan123]

Also if anyone can post some links to low cost trodes, that would be super helpful!

Here are a few I found on amazon:
- Anal bipole probe: https://www.amazon.com/Exercise-Pelvic- ... ms?ie=UTF8

- Another longer one: https://www.amazon.com/Erotistim-Probes ... J3Q79SVTRC

- A butt plug: https://www.amazon.com/Zeus-Electrosex- ... VW1TF5SD2Z

- Penis bands: https://www.amazon.com/Zeus-Electrosex- ... EBFYKBAFJA

- And for the bold, a urethral sound + cock ring: https://www.amazon.com/Zeus-Electrosex- ... VW1TF5SD2Z

- Conductive loop system: https://smile.amazon.com/TCFAFA-Adjusta ... 7NTQN0VK89

[jgrants]

Hi,

You have a nice selection of toys. I would recommend you add a couple of conductive rubber loops. Those are the ones I enjoy the most. On a different forum I was recommended to avoid cheap alternatives specially when looking for the uretra or butt plugs.

These are like the loops I have:
https://www.mystim.com/en/rodeo-robin-p175

Also if anyone can post some links to low cost trodes, that would be super helpful!

Here are a few I found on amazon:
- Anal bipole probe: https://www.amazon.com/Exercise-Pelvic- ... ms?ie=UTF8

- Another longer one: https://www.amazon.com/Erotistim-Probes ... J3Q79SVTRC

- A butt plug: https://www.amazon.com/Zeus-Electrosex- ... VW1TF5SD2Z

- Penis bands: https://www.amazon.com/Zeus-Electrosex- ... EBFYKBAFJA

- And for the bold, a urethral sound + cock ring: https://www.amazon.com/Zeus-Electrosex- ... VW1TF5SD2Z

- Conductive loop system: https://smile.amazon.com/TCFAFA-Adjusta ... 7NTQN0VK89

[mantrid]

@CantoFan123:
Filter caluculation
Exact filter calculation is difficult due to the characteristic of the transformer. But because the proposed filter is very smooth and frequencies of a few hundred Hz aren't dangerous an approximation is sufficient.

Problem is the impedance of the transformer winding X_T which is the sum of the DC resistance of the winding plus the load on the secondary side divided by the winding ratio in square plus a frequency dependent part. The frequency dependent part can be ignored if the transformer is driven within the frequency range from the datasheet. Without frequency dependency of X_T the transmittance factor of the filter becomes A=(X_T+R)/(X_T+R+X_C), where R is the resistance of the series resistor and X_C is the impedance of the capacitor: X_C=1/(2*π*f*C).

With high winding ratios (as higher as more current controlled -- which is what we want) the load dependent part of X_T is very small compared to R and the DC resistance of the winding, i.e. it has only a small effect in the formula for A. I estimate the output load with a few hundred Ohm, lets say less than 300 Ω. (I never measured it. Resistance measurement with a multimeter does not work because a small current between the electrodes due to electrochemical effects. Measurement with a larger DC current is not recommended because DC currents are dangerous. It would have to be measured with AC current.)

Example 1 (Reichelt part, my configuration):

Winding ration is 10, i.e. load dependent part of X_T is the output load divided by 100.

R = 10 Ω
X_T = 6 Ω
C = 100 µF
f = 500 Hz
==> X_C = 3.18 Ω
==> Transmittance factor A=0.83

Example 2 (Digikey part):

Part number 237-1146-ND is the only transformer I found on Digikey that may work. The 2.9 Ω side should be connected to amplifier with an series resistor. I probably will try out this part because it has a higher winding ratio compared to my part. But it is possible the this part becomes to inefficient due to the high output resistance.

Winding ration is 25, i.e. load dependent part of X_T is the output load divided by 625
R = 10 Ω
X_T = 3 Ω
C = 100 µF
f = 500 Hz
==> X_C = 3.18 Ω
==> Transmittance factor A=0.80

You see for feasible transformers R is the dominating part in the formula for A. A simple rule is therefore C=100µF for R=10Ω and C=47µF for R=20Ω.

Digikey part numbers for capacitors: 493-17272-ND and 493-6080-ND

Another issue: the Capacitor is also required to protect the transformer against damage from low frequencies, especially DC current.


Electrodes:
For placement see https://www.sexmachinereviews.co.uk/adv ... .html#male

Butt electrode (prostate) should be purchased. With a current controlled device it feels better as larger the electrode and as lower the contact resistance. The conductive rubber pads I tested have a to large resistance, i.e. the current is located to the place where the current is connected to a metal cable. Electrodes from stainless steel sheet (or washers) work better for me. That is something you have to try out.

Note that is is possible to solder stainless steel with good old Sn63Pb37 solder and special flux.

[sweden123]

Hi,

You have a nice selection of toys. I would recommend you add a couple of conductive rubber loops. Those are the ones I enjoy the most. On a different forum I was recommended to avoid cheap alternatives specially when looking for the uretra or butt plugs.

These are like the loops I have:
https://www.mystim.com/en/rodeo-robin-p175

I use this as well, but I removed the plastic thing and inserted a copper wire through the loops so I can form them however I want

[CantoFan123]

These are like the loops I have:
https://www.mystim.com/en/rodeo-robin-p175

These looks great thanks! I finally got into smartstim (had to request to resend activation email about a week after originally signing up) and have been looking at the DIY anal electrodes. Have to say I agree it makes sense to pay for something safe when it comes to my rear end.

[CantoFan123]

@CantoFan123:
Example 2 (Digikey part):

Part number 237-1146-ND is the only transformer I found on Digikey that may work. The 2.9 Ω side should be connected to amplifier with an series resistor. I probably will try out this part because it has a higher winding ratio compared to my part. But it is possible the this part becomes to inefficient due to the high output resistance.

Winding ration is 25, i.e. load dependent part of X_T is the output load divided by 625
R = 10 Ω
X_T = 3 Ω
C = 100 µF
f = 500 Hz
==> X_C = 3.18 Ω
==> Transmittance factor A=0.80

You see for feasible transformers R is the dominating part in the formula for A. A simple rule is therefore C=100µF for R=10Ω and C=47µF for R=20Ω.

Digikey part numbers for capacitors: 493-17272-ND and 493-6080-ND

Another issue: the Capacitor is also required to protect the transformer against damage from low frequencies, especially DC current.


Electrodes:
For placement see https://www.sexmachinereviews.co.uk/adv ... .html#male

Thanks - incredibly helpful. I will need to read the technical pieces a few more times to comprehend and will take look at the digikey part. Also that list of electrosex positions is fantastic. thank you!

[throwawayacct]

Hi,

You have a nice selection of toys. I would recommend you add a couple of conductive rubber loops. Those are the ones I enjoy the most. On a different forum I was recommended to avoid cheap alternatives specially when looking for the uretra or butt plugs.

These are like the loops I have:
https://www.mystim.com/en/rodeo-robin-p175

I use this as well, but I removed the plastic thing and inserted a copper wire through the loops so I can form them however I want

This is a great way to prolong the life of conductive rubber. The material will stretch and subsequently will lose some of its carbon material, same with repeated cleaning, and won't transmit as readily. The wire limits the stretching, and improves the conductivity.

Currentpleasures.com and happystim-usa.com are my frequent go-to sites for conductive rubber - much cheaper than the branded stuff, and I've found the fatter diameters (8mm) are notably more comfortable. I don't know what sites outside the US offer bulk conductive rubber, but I'm sure there are a couple other stimmers who can assist with that info.

[jgrants]

The wire core on the rubber loop is actually genius. It should also solve the hot spot issues that mantrid mentioned due to the high resistance of the rubber.

[mantrid]

The wire core on the rubber loop is actually genius. It should also solve the hot spot issues that mantrid mentioned due to the high resistance of the rubber.

I would not describe it as hot spot, it's just feels not as good as metal pads.

Of course, the wire fix only works with tubes. Other tricks are connecting both ends of the tube and using multiple windings. This increases the surface which feels better.