today I will show you my latest construction.
Some month ago Horatius Steam shows me his Poltergeist.
It was a nice, amazing construction and within second I know this is a “must have”.
Now I decide to build one as a birthday gift for my lovely girlfriend.

AndyGadget has already build and post it here by Instructables.
I used his circuit diagram and his code for the PicAxe chip.
But I was able to make some powerful changes because I buy the new PicAxe 08M2 chip.
The memory of this chip is raised to 2048 bytes (256 bytes before)
For more read the PicAxe Website

Also don't miss to visit my website with more great projects under Steampunk-Design.

Parts you need:

1x PicAxe Breadboard and USB or Serial programming cable Set
1x PicAxe 08M2 Chip
1x IRF520
3x 1N4148
1x 1M Ohm
1x 22K Ohm
1x 10K Ohm
1x 220 ohm
1x 47uF 16V or more electrolytic capacitor
1x 0.1uF 16V or more ceramic or foil capacitor
1x Piezo Sounder used as Sounder EUKLIT 1130
1x Piezo Sounder used as Microphone EUKLIT 1091
1x 3Volt engine
2x LED
1x Switch
Battery holder for 4 AA batteries or a 6Volt Battery
Wooden Box

How it works:

After you switch the circuit on the PicAxe Chip listen on the I/O port 1 where the microphone is connected.
If you knock on the box the microphone change the vibration into voltage.
Voltage means high and the chip count the high.
If there no more counts over a selected time period the chip power up the engine on port I/O 4 in the same quantity and frequency.
If the chip counts 13 knock it play the Adams Family Theme.
At 20 knock it start a prank mode (do nothing for 30 seconds after that makes 50 knocks with random delay).

Step 1: PicAxe Chip

I've used a PicAxe 08M2 microcontroller which comes as a blank chip and needs to be programmed. To do this, you will need the Starter Set with the programming lead and the software for the programming editor. With this set you are able to create more amazing controlled things.

I also do only this first step into the big world of chip controlled projects.
If you have further questions don't be disappointed when I have no answer...

If you complete soldering your Breadboard (only two resistors a capacitor and chip holder) you can start with the programming.
I don't tell you how you complete your breadboard or install the program because with your starter kit you got already a complete instruction.

I only told you the modification on the code which I made in comparison to AndyGadget!

First of all I remove the programming part in the circuit because I use the Starter Kit and insert a complete working chip into the circuit.
If you also use a breadboard you can remove the audio socket from the circuit.

I try at least 5 different piezo sounders and most of them don’t work well as microphone or make a bad noise during play the sound.
I took a closer look on the piezo sounders and find out that the sounders which are able to use as a microphone has a small bandwidth on the sound.
But I want a clear and good speaker.
I decide to use a separate microphone and a speaker.
So I use the In/Out 1 for the microphone and the In/Out/Tune 2 for the Speaker.
With the new Chip with a bigger memory I was able to add this into the code.

Then I want a flashlight during the knocks.
I also add this code and use the In/Out 0

Because I have a heavy weight as knocking arm I expand the time the motor turns on.

Here you can download the my complete complete code for the PicAxe 08M2!
<br>Hi your version looks great also. I have made a knock box using the the old 08m chip and I run this project with my students. I have tried the new chip with no sucess. I have just been reading your instructable and see you need a certain piezo. I have had a look to find a EUKLIT 1091 but I can not source them. Could you tell me the specifications of the piezo so I can see if i can find one similar? Also what issues did you find with the different piezos as a microphone did you find some did not record the sound? <br> <br>
Really nice. But what does the first word on the box say? I can only see &quot;TA??AS KLOPF GEIST STOERE NIKHT&quot;
hi, you are nearly there! <br>First word is tanja the name of my girlfriend. <br>The complete text is &quot;Tanjas Klopfgeist stoere nicht&quot;. <br>In Englisch &quot;Tanja's Poltergeist don't disturb&quot;.
Very nice. I appreciate the fact that english is not your first language, but you did very well with the english instructions. Nice work, and a nice little box.
Absolutely awsome and cool, great job<br><br>

About This Instructable


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Bio: Steampunk-Design builds and developed the most modern technical equipment, fine jewelry and futuristic devices implemented with funds and materials of the Victorian era.
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