Build your own micro:bit watch from an old pair of jeans and T-shirt!
Make a watch for your micro:bit.
Duration: ~30 minutes
Using the ruler and pen, mark a rectangle of more or less 26cm x 5cm on the T-shirt. Don’t worry if you don’t get it quite right, we’ll tidy things up later on.
Cut the rectangle using the scissors. Don’t worry about the quality of the cut, we’ll trim it later on.
Cut a piece of cloth from the pair of jeans. Cut straight by the seam.
Using the ruler and pen, mark a rectangle of 22cm x 5cm (adults should use 24cm x 5cm) on the jeans cloth.
Stretch the cloth using your hands and apply the double-side tape on the rectangle marked on the jeans. You might need the help of a friend to achieve this step. Don’t worry if the tape is larger than the rectangle, we will trim it later. Make sure to apply pressure to the tape to secure it firmly.
Using the scissors, cut the rectangle of jeans.
Peal the tape protective layer from the rectangle.
Place the micro:bit pins on the tape at more or less 7 cm from the left border. Then lower the micro:bit on the tape and press gently.
Connect the battery holder and place it on the right of the micro:bit. Tuck the cables away on the tape to protect them.
Stick the T-shirt rectangle from the top of the micro:bit, over the battery cables.
Use your fingers to push the T-shirt cloth under the micro:bit to give access to the micro-USB plug.
Place the T-shirt over the battery holder and stick it up to the end.
Turn over the watch and cut the extra T-shirt material.
Stick the T-shirt cloth on the other side of the watch. Lift the micro:bit pins to slide the cloth under and leave them free from the tape.
Turn over the watch and cut left over T-shirt cloth.
Cut a 5cm x 5cm square of Velcro loops.
Cut a 5cm x 5cm square of Velcro hooks.
Stick the Velcro hooks on the right side of the battery holder on the T-shirt cloth.
Stick the Velcro loops on the other end on the jeans fabric.
Trim any leftover fabric, threads or tape.
Your watch is ready! We’ll now add code to the micro:bit to make it keep time for real!
Let’s make a counter for your watch to remember all the motions you make when you walk or move your arm.
Duration: ~5 minutes
We need a variable to keep track of how many motions you make.
on starton to the workspace.
Make a Variable. Name the variable as
motions. Drag out a
set toblock and change the name with the dropdown to
motions. Place the variable into the
show numberfrom Basic and put it after the variable. Now, change the
motionsvariable from the Variablescategory in the toolbox.
Ok, now we’ll count and show all of your movements.
on shakeblock from Input and place it in the workspace.
change byand place it in the
on shake. Change the variable from
show numberand put it at the bottom of the
on shake. Find
motionsagain back over in Variables and replace the
If we want to start over from zero, then we need to have a way to reset the motion count. Let’s use one of the buttons to do it.
on button pressed. Place a
set toinside. Change the variable name to
show numberand change the
0to the a
Yeah! You’re ready to count your movements. Press the
Download button to move the code to the micro:bit. Walk around, move you arm, and watch it count! Press the A button if you want to start over.
Are you up for a bigger challenge? How about making your watch turn into a countdown timer or even a real digital watch? Take a look at some other coding projects for the micro:bit watch:
Artistic design by Melinda Hoeneisen.
DownLoad Url osoyoo.com