Everyone knows that Steampunker have countless ideas and projects which must be stored safely until all the parts are available or the last problems are solved.
From my experience, some ideas needs a few months of planning until they are really ready to be implemented.
In order to work in this time the ideas are not forgotten or are even get stolen from curious colleagues, they must be drawn and written carefully down and kept highly secured.
For this purpose, I have developed this sketchbook.
It has a two-way protection.
The first is a combination of four switches, each with 4 steps, thereby resulting 265 possible switch positions. If the right one is found, only the circuit is closed and the PICAXE starts to work.
Now the second security system comes to bear.
It must be entered the right knock code!
If this code entered incorrectly a fitting melody played and a cooldown time of 80sek starts. Only after this cooldown time a new attempt permitted.
When the right combination is found you will hear a different tune, and the book will open.
If you want to close the book you must push a small hidden pushbutton.
But look for yourself: In HD mode you can recognize all the small details.
- Paper Blanks book Grolier Grande 35€
- Picaxe 08M Modul (AXE230) 20€
- Piezo 1€
- Switch 4x 4-positions10€
- Servo micro 10€
- Nokia BL-5C battery 8€
- Brass pipe 4mm 6€
- Brass pipe 2mm 4€
- Brass pipe 1.5mm 2€
Step 1: Modify the clip
The main reason is that they already have a metal buckle to close it.
With only two small modifications I was able to prepare it for my project.
First of all I remove the small magnet inside the buckle with a sharp knife.
Then I solder a brass pipe which I cut in a little bit over the half diameter instead of the magnet.
Then I push the old splint 1.5mm out of the buckle adapter.
This hole I drilled up to 2.1mm.
Make sure your 2mm brass pipe moves very smooth through both holes.
If you lift up the buckle and stick the 2mm brass pipe inside the book is locked.