Category: 3d printing

New fusion 3d printed and silicone molded vibrator

fusion tinkercadThis is the initial design. The round curved form will be in silicone with vibration motor within (vibration motor not shown on sketch). The red part is 3d printed. It is the enclosure for the body interaction vibrator development board and LiPo battery. You can plug-in the Micro USB connector for battery charging. In addition there is an on/off switch e.g. for travelling.

Update for “balls revisted” – silicone molded vibrator

balls-revisited-v3-wit-v4-inlay-blueThe “ball revisited” silicone molded vibrator uses a wireless charging module. Unfortunately there are different version available. The version with some textile like cable jackets have a different inner radius of the receiver have changed the mounting on top of the picture as this type of the receiver coil needs a little more space. In addition the encasement is a bit larger. new-inlay-seen-from-side-BThere is enough space for the body intercation board (top), wireless charging board (right) and the LiPo battery (below).new-inlay-seen-from-side-BFinally the wire of the vibration motor is glued in the middle of the follow the “old” instruction – nothing has changed. When printing out the 3d parts use the new version 4 of the inlay. All 3d printing STL files at Thingiverse


Connecting a servo motor – move your vibrator

The body interaction vibrator development board can be connected with additional sensors and actuators. In this post we show how to connect a servo motor. A servo motor can adjust its shaft to be positioned in varies angles. We use a inexpensive SG92R servo which can be positioned in any position between 0° and 180°.

servo-birdNow we can build eg. a linear actuator which could be useful for sex toys. If you have a 3d printer you can build your linear actuator and fix the servo motor. You can download the design here.


Connecting servo motor and body interaction vibrator development board

The servo motor has 3 wires: ground (-) (black or brown wire), power (+) (red wire) and control (yellow or orange).

servo connection 2pcb-bottomConnect the (+) wire to the body interaction board. You can use the pad on the bottom side as shown on the image.

servo pcb layoutservo-pcb-from-topThen turn the board around to the top side. Now you can solder the black wire to the “GND” (ground) pad. Then solder the orange or yellow control wire to the leftmost pad “PA1”.

Programming the servo motor

The standard Arduino servo library will not work on the body interaction board. But you can use the TinyServo library. Download the library as *.zip file  here or here and read the forum post.

Go into the Arduino library manager and include the ZIP file. Please restart Arduino.

The following script attaches the servo motor and shows how to control it.

// servo control with the body interaction development board using the TinyServo library
// -- adaption of the demo script by
//'s ATTiny Hardware Timer Assisted Servo Library v1.0 20-Nov-13

#include <TinyServo.h>
const byte SERVOS = 1; // number of servos is 1
const byte servoPin[SERVOS] = { 7 }; // servo is connected to PA1 which is pin 7
#define SERVO 0 // our servo is given the name "SERVO"

void setup() {

void loop() {
  moveServo(SERVO, 180); // move servo to 180°
  moveServo(SERVO, 0); // move servo to 0
  for (int i = 0; i <= 180; i++) {
    moveServo(SERVO, i); // move servo from 0° to 180° in 1° steps
  moveServo(SERVO, 0); // move servo to 0°



Silicone overmolded vibrator – balls revisited

molded-quermolded-with-ueberh-querBuilding your own silicone molded vibrator becomes now easier. We already have presented 3d printed forms for building your personal vibrator (massage wand, wireless charged vibrator). The vibrator uses the body interaction vibrator development board. The body interaction board has a Arduino compatible microcontroller, vibration strength control by motion, a vibration motor and a rechargeable battery.


balls_revisited_3_inlay_part_bWhat is new? The electronics including battery are in the base of the vibrator. We developed a 3d printed enclosure for the electronics. This has several benefits: The assembling of the electronics and the molding itself is easier as everything is fixed within the enclosure. And it is more safe as the enclosure shields the electronics from the environment (and vice versa). In addition we used a different charging module from Seeed Studio. The input voltage is only 5V. Now you can connect the charging module with a USB connector and don’t need another power supply. (Look here for an explanation of wireless charging sender and receiver.)


Another improvement is the placing of the vibration motor. The vibration motor can now be placed in the center of the vibrator and it different heights. Just were you need the power.

balls_revisited_3_inlay_part_aFinally the mounting is improved. The mounting holds the enclosure when it is inserted into the form.

balls_revisited_3_finalThe mounting (together with the enclosure with the electronics) is inserted into the form. The form consists of two parts which must be fastened together by tinker wire. It is a variation of the ball theme.

We present a step by step procedure for tinkering the vibrator. You need:

  • 3d printed form (molding form, 2 parts)
  • 3d printed enclosure
  • 3d printed mounting
  • body interaction vibrator development board
  • silicone with a high shore A value (eg. shore A 45 which is quiet hard but still flexible), approx. 100 ml
  • wireless charging module eg. from Seeed studio
  • soldering station, (hot) glue

Step by step procedure:

A. Print out all forms. You can download the forms from Thingiverse.


B. Connect the wireless charging module to the body interaction vibrator development board.

B.1 You have to solder a wire connecting (-) on the wireless charging module and GND on the body interaction board.

B.2 Now comes the tricky part. You have to connect (+) from the charging module with the body interaction board. Solder a wire at (+) of the charging module. But where do you solder the wire on the body interaction board? Unfortunately the wireless charging option was not taken into consideration during the development of the board. So there is no appropriate connection on the board.

circuitThe best solution is to unsolder the USB connector and connect to + of the USB connection. The easiest way to unsolder the surface mounted USB connector is done with a hot air soldering station.  Alternatively you can solder the wire directly to the MAX1555 module – this solution is presented here. In any case: Be careful not to break the tiny pads connecting pcb and USB connector.

B.3 Connect the sender module with a 5V power supply. You can use a USB cable, dismantle the cable and connect the black and red wires.


C. Place the receiver charging coil on top of the enclosure. The diameter of the top side is a bit larger than the diameter of the bottom side. Use some glue to fix the coil. Don’t fix the mounting now. It is easier to do it later (step E).


D. Put the electronics into the enclosure: Begin with the body interaction board. The RFM12b is quite large so place it at an outer position. Then insert carefully the LiPo battery. Don’t force it! The plugs for the battery and the motor could break. If you have done so insert the tiny wireless charging receiver board. At the end fix the wires of the vibration motor in the middle of the enclosure.

E. Connect the mounting with the enclosure. There are 2 holes provided where the mounting fits into the enclosure. Use some glue to stick together both parts. (see picture above step C).



F. Put together both parts of the molding form. Use tinkering wire to attach both parts tight together. Then insert the enclosure into the form. Check the wireless charging function. The yellow LED must be on when you place the charging coil over the receiver coil.


G. Now poor silicone into the molding. We use Shore A 45 silicone which is rather hard. The silicone has to dry for some hours or days. Read the instructions of your silicone provider.


H. When the silicone is hard, you can remove the tinkering wire. Then carefully remove the form.


I. Remove the overhang.


J. Test the wireless charging. The orange LED must be on when both coils are near together.

molded-bottom IMG_20160303_184830

K. Remove the mounting.


Design your own forms using Tinkercad. Start now and share!

Old versions of the enclosure:Enclosure & mounting togther, Enclosure , Mounting

Download the STL files for 3d printing from Thingiverse.

Update 2016/03/12: Added image of circuits showing where to solder the wireless charging module.

Update 2016/04/05 redesign of mounting and enclosure due to different versions of the wireless charging receiver coil

Vibrating 3d Printed Necklace

necklace-frontThere are a lot of sensible areas of the body which are also erogenous zones (see Wikipedia). The neck is one of them. Stimulation can be achieved eg. by licking and kissing. The stimulation can be quite strong. So why not try to stimulate your neck with vibration? We think it works.

Think of an artistic designed necklace or collar with a vibration function. The vibration will be turned on when you move and gets more intense when you shake our head eg. while dancing. Or the vibration function will be turned on remotely by your friend.

necklace tinkercadBody interaction has made a 3d design for a vibrating necklace. It can be secured by a solid clip closure at the back of the neck. At this place the vibration motor is positioned which gives an intense vibration especially at the back of the neck but also at the whole neck.



necklace-circuitsThe body interaction vibrator development board is inserted into the collar. It controls the vibration motor. The more you move the more it vibrates. There is also place for the battery. Wires and boards can be hidden. Unhidden it has a scifi look-alike.





closure-topIn the front there is a solid but easy to close hook closure.







Download 3d files from Thingiverse and print it.

Get the vibrating electronics from Tindie.

Edit and design your own with Tinkercad


Wireless battery charging of the body interaction vibrator development board

bisiliconeformfilledreadybigsiliconereadyvogel2One major Problem oft DIY electronic sex toys (or massage wands) are the need to charge the batteries. Usually the batteries are charged via the USB connector. This means that there is a physical connection between the sex toy and the USB connector, making it impossible to mold the whole sex toy with eg. silicone.




The solution is to use a wireless charging module (eg. this module from Seeedstudio). It comes in two parts: The sender (IN) and the receiver (OUT). Both are connected with a coil. If you place the two coils close together, the sender coils induces power in the receiver coil. Though you can share the batteries wireless. The receiver could be molded, separating the electronics, batteries, connectors etc. from the environment. The result is a form with a smooth surface enabling secure usage as a sex toy.




bigsiliconeready crossmeovedWe have made an easy DIY solution based on the body interaction vibrator development board, wireless charging module and a 3d printed silicone molding form.










big wireless part a

Part A: The molding form consists of two parts.


3d print form A

Step 1: The form comes in 2 parts. Print both parts of the form. The STL file is called part A. After printing polish the inner part of the form as well as the surface between the two sides.







big wireless part bStep 2: Now print out part B. It is used to fasten the board, battery, receiver coil and receiver board.







verkabelung seeedwirelssechargingStep 3: Connect the + pad of the wireless charging receiver board with the pin marked + of the vibrator development board (that’s pin 1 of the MAX1555 battery charging IC). Connect – of the receiver with the GND pad of the vibrator development board. You need two short wires and have to solder them at the two boards.





wiresStep 4: Now wind up the wires connecting the board with the battery and the vibration motor. (The connection to the receiver board is not shown on the image.)








battery and board installedbattery and board installed 2Step 5: Now attach the coil on the shorter “cross” of part B with some glue. There must be space between the coil and the outer longer cross. Then attach the board, battery and vibration motor as shown in the pictures. you can use some glue to fix these parts. Be sure to set the switch to the ON position.






The receiver board can be placed within the coil. It’s the small long board in the middle.









boardandbattery in half-formStep 6: Fix part B (with board, coil etc.) at part A. Be sure that there is enough space between them (min. 5mm).











form and electronics inserted 1form and electronics inserted vogelansichtfilles form from topStep 7: Now attach the second part of part A. Use some tinkering wire. Double check: There must be space between Part A and part B. And there must be space between the coil and the upper edge of form A as the coil must be molded by the silicone.






aftermolding wireless formStep 8: Now pour silicone into the form. Use silicone with a high Shore A value. The higher the Shore A value is the higher is the firmness of the silicone form. We have used silicone with Shore A 45. You need about 90 ml silicone.











bigsiliconeready removedStep 9: After the silicone gets hard, remove the tinkering wires and softly remove the form A. Remove overhanging part.







bigsiliconeready crossmeovedStep 10: Now you can remove the outer cross of part B.











bigsiliconereadyvogel1That’s it. It takes about half an hour (without printing). Before using check carefully that the silicone is solid. Even if you skew the silicone form you should not be able to feel the edges of the vibrator development board. Otherwise there is the danger to get hurt. Use it as a massage toy on your own risk. For charging the batteries place the molded coil over the sender coil. The yellow charging LED should go on.

The next development step is a battery charging station!






Download 3d printing files from Thingiverse

Modify and construct your own with the online 3d modelling software Tinkercad: Form A, Form B


Print your vibrator case, visit our galleries and read the quick start guide

The case for the body interaction vibrator development board are printed with a 3d printer. There are two possibilities.

(1) You can use a printing service like Shapeway or Sculpteo. Sculpteo has the advantage that they offer food safe material. This means there are no risk if you apply the case to your skin or even insert the case. Follow this Link to the Public Sculpteo Library. The library offers 3d views, material, color, finishing configuration and price calculation (there are no surcharges for the designer.):

sculpteo library(2) You can print the design on your own 3d printer at home. If you don’t have one you could go to your next Fablab or Hackerspace and ask if you could us the printer. You need a STL file which can be downloaded from

xyz printerAfter printing the case you can assemble the body interaction vibrator development board. In the blog you will find several videos which explain the assembling. For a quick reference please download our guide: quickstartguide-bodyinteraction1

How-to assemble the vibrator ring case

ringredbottom small ring red side small

We have ordered a food safe version of the vibrator ring case from a 3d printing service provider. The case consist of the main body and a kind of cap to close the case.

The design could be improved to have more space for the battery and a more stable cap. The ring diameter is too small for most males, but you can combine the vibrator ring and the “organic” vibrator for her. The combination of these two vibrators gives you a vibration in two dimensions. (The vibration of  a vibration motor is only strong in one direction – you can think of either the x-, y- or z-axis of a coordination system. If you combine two motors you have vibration along two axes of the coordination system, take three you have vibration along all axes).

The video shows how-to assemble your own vibrator ring.

View with YouTube

Improved version! Open with Tinkercad.  Download from Thingiverse.

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