Let's Make Robots!

La Tostadora!

Makes toast

This is my 2nd bot. The first was a tracked obstacle avoidance guy but he lacked personality. When the toaster stopped working I figured it was a good opportunity to make a new one!

The tracks are from a dollar store Erector Set knockoff bulldozer kit and they're powered by 2 hobby servos modified for continuous rotation. 2 other servos control the sensor head. One raises the head and the other rotates it.




I plan on changing the voltage regulator to a DC/DC converter and maybe going with a Tamiya gearbox/tread setup in the future.

If I can pull it off I'd also like to make a mechanism that would raise/lower the wheels or treads into the chassis so he would appear to be a normal toaster until activated.. My own personal transformer!

I don't like the fact that he's 100% defensless in a dangerous world either so I may add a fork launcher to the 2nd slot.











It's controlled by a home made Atmega 328 board that I put together:


I added a video of the head "nodding". I thought it turned out pretty well!


Still a long way to go...


Wow, it's been THREE MONTHS since I worked on la toastadora!  I had to scrap  some of the inside mechanism to make room for retractible treads. So far the mechanisms are coming along but the code is something else...

Under her skirt:



See, she DOES have a figure!




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PIR sensors sometimes get a bad rap among roboticists because they're completely useless while a rob is in motion.  What they detect is relative motion.  Basically a PIR sensor is what is in the motion triggered light on your neighbor's back porch that wakes you up whenever racoons are screwing in their yard.  You aim it at whatever you want and when something moves through its range it goes high for a predetermined amount of time, then back to low.  Now on a machine that has a normally/occasionally restive state, you can take advantage of this in many ways.  Multiple PIRs can be used to turn the bot towards the motion (see my Serv-O) in conjunction with a distance sensor to "find" people (or sometimes circulating fans and escalators.  It ain't openCV but it runs on Arduino.)  However, if you poll the sensor while it is in motion, of course you'll get a high reading because the walls are moving relative to the rob.

As usual, the Lady Ada tutorial is really the last word on the subject as far as I'm concerned.

The Lady Ada tutorial is pretty much all-inclusive!

Another way for you to sense that someone (or something) is nearby is to use a microphone to detect any sound above a set threshold. Like the PIR sensors you could use two or more to give La Tostador the ability to 'home in' on the source of the noise.

This project uses a cheap and fairly simple circuit to get the job done, but I'm sure you could make an even simpler version using fewer transistors or an OpAmp for basic threshold detection.

He's like a turtle with a friggin' laser. This is what I would do if we ate toast and the toaster died. Collected!

This guy is looking great!
I'm happy to hear you are thinking of making it look like a normal toaster when inactive... maybe you could add a cheap PIR sensor or something so that he can 'wake up' when a person comes close to him?

Looking forward to seeing your progress =)

Cool how his head pops out :D like it!

Here he is naked:



I'm working on this:



Which will allow him to look up. as well as sweep from side to side. Not very functional but it should give him some more personality!



LOL you made a robot out of a toaster with popup scanner, nice !