Category Archives: Arts & crafts

random stuff that doesn’t fit in the other categories

Bottle rocket (+launch platform)

What?

A bottle rocket launch platform with gardena connection for quick and safe release of the bottle.

Pressure is added to a bottle with some water by a bicycle pump. when the bottle is released from the platform, the pressure expels the water in the bottle, generating lift.

Why?

Same as usual… got bored.

How?

Requirements are:

* A bottle (coke bottle preferred as they are sturdy).
* A bottle cap that connects to the gardena connector (I 3D printed this one)
* A Gardena connector, connected to a bicycle pump (I made a small platform with the connector, a one-way valve, and some longer hose to connect to the pump).
* A bicycle pump (or other pump capable of delivering around 2-7 BAR).

You fill the bottle with some water, connect it to the hose, and pump in as much air as possible (be careful not to pop the bottle).

Then release the bottle and watch it fly.

 

Video

can be seen here

Minion Bristlebots

What?

My own take on the classic bristlebot, with a 3D printed battery holder.

These little buggers move around thanks to the vibrations from the motor.

Why?

To give a workshop.

How?

The vibrations from the motor make the bot move around, by bending the hairs of the toothbrush backwards, the bot moves forward (kind of :D).

Requirements are:

1 toothbrush
1 vibration motor
1 CR2032 battery
1 3D printed battery holder (found here)
hotglue
(googly eyes)

Instructions on how to put them together:

step 1: cut the head of a toothbrush
step 2: print the battery holder
step 3: attach the vibration motor to the battery holder and put the 2 leads into the holder block so the battery can touch it.
step 4: hotglue the holder to the toothbrush head
step 5: cut (if needed) the toothbrush hairs to length and bend them backwards so the bristlebot will go forward instead of in circles.
step 6: decorate and race!

 

Current status:

Finished, thinking about making a racetrack for them.

Pictures:

front
front
side
side
Back
Back
Bristlebots having a meeting
Bristlebots having a meeting

 

bomb defuse game

What is it?

It’s a game for children, you get a bundle with 5 tasks/puzzles, each of them gives you 1 digit, when you collected the 5 digits, you can defuse the bomb. If you did something wrong, the bomb will ‘explode’.

Why?

The design was made to be used by speelplein zowiezo. a youth working organisation. The request was made by  hackerspace Brixel in Hasselt to create something fun and tech’ish for kids.

How?

The bomb itself consists of an arduino, LCD display, piezo buzzer and a keypad. The participant first enters his/her bundle number they got assigned, and then enter the code, if the code is correct, music will play and the display will show ‘bomb defused’. If not the correct code, the buzzer will play another tune, and the display will say ‘bomb exploded’.

The code can be obtained from solving the puzzles in the bundles, for now, these consist of morse code, vinegere table ciphers, and other kids friendly puzzles that teach crypto.

 

Pictures:

the bottom blue cable is the USB, it provides power.
the bottom blue cable is the USB, it provides power.
enter code please?
enter code please?

 

Nothing says 'ACME' more then cheezy curled wired.
Nothing says ‘ACME’ more then cheezy curled wired.