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    Ask HN: Most interesting tech you built for just yourself?

    1901 points l2silver | 16 comments | 27 Apr 23 15:04 UTC | HN request time: 0.845s | source | bottom

    Maybe you've created your own AR program for wearables that shows the definition of a word when you highlight it IRL, or you've built a personal calendar app for your family to display on a monitor in the kitchen. Whatever it is, I'd love to hear it.
    1. HornyDude ◴[28 Apr 23 19:24 UTC] No.35745949[source]▶
    Throwaway time!

    I built a custom smart motorized masturbator.

    It borrows from 3D printer design, and has a NEMA 17 stepper motor driving a 2GT belt loop around a short length of 2020 extrusion to slide a carriage along a linear rail. The carriage has attachment points that I've put clamps on, that close around a fleshlight-style sheath. There's a brace at the business end that you put around the base of the penis and it keeps everything aligned.

    All the parts are custom-designed and 3d printed.

    It has an outboard control box that contains:

      - an ESP32-based microcontroller with a small OLED screen. 
  - a clickable rotary encoder that is the single input control
  - a TMC2209 stepper driver
  - 12v power input and a buck converter to feed the esp32
  - 12v output ports for 2 additional vibrators and an an H-bridge module to control them
    The simple UI allows full control over the motion:

      - stroke duration
  - stroke amplitude
  - offset from the 0 position
  - motion path (just sinusoidal vs triangle wave so far)
    The controls also allow control over the secondary vibrators for intensity, rhythm, and duty cycle.

    It's been evolving for a couple years now and it works brilliantly!

    replies(10): >>35746031 #>>35746164 #>>35746227 #>>35746285 #>>35746399 #>>35747840 #>>35748944 #>>35751264 #>>35752898 #>>35764787 #
    2. swampthinker ◴[28 Apr 23 19:30 UTC] No.35746031[source]▶
    I cannot believe that username was available.
    replies(1): >>35749010 #
    3. parasti ◴[28 Apr 23 19:43 UTC] No.35746164[source]▶
    Finding bugs must be unpleasant.
    replies(1): >>35746833 #
    4. UncleEntity ◴[28 Apr 23 19:49 UTC] No.35746227[source]▶
    Just to toss one out there…

    You need a fitness tracker and some machine learning to really get your freak on.

    Sorry, too tired to come up with a good robot innuendo.

    5. shsbdncudx ◴[28 Apr 23 19:54 UTC] No.35746285[source]▶
    They do say you should scratch your own itch
    6. trollied ◴[28 Apr 23 20:04 UTC] No.35746399[source]▶
    Does it have Apple Health integration?
    7. stavros ◴[28 Apr 23 20:39 UTC] No.35746833[source]▶
    Nah, there are no bugs if you wash it after every use.
    replies(1): >>35747168 #
    8. jagged-chisel ◴[28 Apr 23 21:12 UTC] No.35747168{3}[source]▶
    Gross >.<

    Hilarious, but gross

    9. kilroy123 ◴[28 Apr 23 22:21 UTC] No.35747840[source]▶
    You can't leave us hanging like that. No pictures of this thing?
    10. alden5 ◴[29 Apr 23 00:58 UTC] No.35748944[source]▶
    mr. fancypants here with the silent tmc2209 driver lol
    replies(1): >>35750307 #
    11. matheusmoreira ◴[29 Apr 23 01:09 UTC] No.35749010[source]▶
    Such a shame it's a throwaway. They should keep it!
    replies(1): >>35752555 #
    12. short_throw ◴[29 Apr 23 05:30 UTC] No.35750307[source]▶
    Gotta switch to some a4988s so the machine can moan back.
    13. kristopolous ◴[29 Apr 23 08:53 UTC] No.35751264[source]▶
    Commercialize it
    14. fuzzfactor ◴[29 Apr 23 13:11 UTC] No.35752555{3}[source]▶
    >I cannot believe that username was available.

    Have you seen anything hornier?

    >Such a shame it's a throwaway. They should keep it!

    I expect he'll come again.

    15. cripblip ◴[29 Apr 23 13:58 UTC] No.35752898[source]▶
    Dude, you have to write this up!
    16. Kye ◴[30 Apr 23 17:39 UTC] No.35764787[source]▶
    There's a tool you might like: https://buttplug.io/