Introduction: Beware of the Horrible Pumpkin Bots ....
They came over me with full force. I did not expect them to be this powerful. Hopefully they all lose their energy very soon ... ;-)
Step 1: What You Need
It helps a lot if you own many many things that you got out of old electronic devices. I used motors from old XBOX gamepads to make the robots shake ... and move. I used old motors from useless floppy disk drives to build a the crawler.
out of old pc mainboards I got battery holders and 3V button batteries. Also LEDs or resistors could be sourced out of old electronic parts.
To make the radio controlled mover I bought a bunch of radio controlled mini cars. I got 27Mhz and 40Mhz cars so that I can guide two robots at the same time.
Step 2: The Headbanger
The legs are made with the contacts of LEDs. These legs are rather soft. Together with the hight center of mass, the motor is mounted rather high, it leads to the slow "headbanging". As you can see in the video, this bot is moving!
After some fun with the simple version I attached a small switch that I found in an old floppy disc drive. This switch is activated when the motor "headbangs" to the side of the switch. It is deactivated when the motor moves the "rumble masses" to the other side. This leads to some oscillation.
The advantage of the soft legs are also the disadvantage of the bot. After a lot of "headbanging" the legs will break. Now we see ... IT'S DANGEROUS!
Step 3: The Smoker
I did not use a Goldap here but a 3V button cell battery that I took from an old pc mainboard, including the battery holder.
On his nice cloak he got some fluorescent pieces ... sadly this can not be seen on the video ...
On the top of his head he has what we call "RÃ¤ucherhÃ¼tchen" in German. I don't know what this is calle d in English, maybe one of you can help me.
Sadly also the smoke cannot be seen on the video and it is really loss that videos don't smell :-)
Step 4: The Tumbler
To make him really scary I added some nice red leds.
I used a bunch of rubber bands to make the hair. It "flows" in the wind while he moves ... really crazy :-)
Step 5: The Crawler
The construction is rather easy. I used a thick copper wire that is used for the power in houses. I removed the insulation and build a T using two pieces. On one piece I soldered the small motors. The motors got short pieces of the insulation that gives them a better grip.
Now I took a 3V lithium battery and removed the plastic. I mounted the "naked" battery onto backbone of the crawler. To fix it I used paperclips, the ones that are coated with copper, so I could solder them to the backbone. The motors need to be connected so that they turn in different directions. I added a small switch and soldered the wires directly onto the battery.
Watch the video to find out how good this works.
He moves fast and he looks to the front and to the back simultaneously, isn't that scary? ;-)
Step 6: The Driver
To attach the Pumpkin I had to remove some parts of the carriage. I removed the antenna and use a wire instead. This wire can easily be but into the pumpkin.
The LEDs are mounted on top of the motor block. I removed them and put new ones into the pumpkin. I wired them using tine copper wire that has some varnish (is that the correct English word?) on it. The wires where all weeded through holes in the carriage.
The pumpkin is now glued onto to carriage.
Step 7: The Blitzer
To build this bot is rather dangerous! I REALLY mean that! It is because I used a photo flash light from a used one way photo camera. These devices use very high voltages and they can KILL you if you put your fingers onto the wrong parts.
I had to modify the flash to make it smaller so that it fits into the pumpkin. You can see on the images that I cut it in half and made a cube out of the two parts.
I wanted to make the pumpkin turn around and have some flashes then. I decided to use a small motor that I ripped out of an old CD-ROM drive. The gear was still there. That make the outer gearwheel turn rather slowly. I glued the casing of a presenter pen onto the wheel. Inside this casing I put some switches and the 3V lithium battery that powers the flash.
I wanted the flashes to appear automatically. I added a small slider switch that I ... once again ... got from an old CD-ROM drive. Those CD-ROM drives are really valuable crap ... ;-)
This switch slides along a screw and shortens, while doing so the flash happens.
I needed a power switch because the battery was meant to disappear into the casing.
All wires soldered, flash into the pumpkin, pumpkin onto the top, ignition switched on ... and ... motor started. Se the video to find out how it works ... ;-)
Step 8: Usage
Step 9: After the Party
Playing with The Tumbler, my other son found out that it can spin really cool and fast ... have a look at the videos! :-)