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Not every product we design is destined to make it to the consumer. Sometimes a great idea gets taken to completion before we realize that one factor or another dooms it to an existence in our failed project bin. One such project that now lives a watery grave is the Sharkbot. Akin to our much loved Herbie the Mousebot, the Sharkbot was a light seeking, semi-intelligent robot with a unique and quirky movement mechanic. Instead of driving along with a regular DC motor, the Sharkbot used a servo motor to “wiggle” the front wheel set back and forth, propelling it forward, not unlike a shark or fish would wiggle their tail to do the same. But up front, using... wheels. Trust us, it's cool.
Watch video: We fell in love with the idea way back in 2007 after buying a wiggle/swing car (a.k.a. "Plasma car") for the kids, but ended up having the staff run laps around the office on it instead. What a cool idea... We prototyped a robot chassis using a simple DC gearmotor driven by a BEAM light-responsive "Bicore" oscillator. With one motor we were able to get propulsion, direction, and even reversing with minimal mechanics and electronics. Plus, it looked fabulous. We had to try to make this into a seriously fun robot.
After several prototypes, we got to a stage where it needed some love to get past the 80% mark. Unfortunately, other projects took priority, and it languished until just earlier this year. We updated the mechanics to use a servo and microcontroller, sourced better light sensors, and gave it a truly sleek PCB design that pushed the abilities of our PCB house (they wanted to keep one as a showpiece). However, this is when the Sharkbot became beached.
While new PCB design companies have been bringing down the cost of PCB fabrication, the raw cost of FR4, the main ingredient in a printed circuit boards, is still considerable. With the Sharkbot using a 7 x 4.5" PCB, it wasn't cost effective for what the kit did. Replacing some of the body materials with less-expensive alternatives brought up new fabrication challenges. Mechanical constraints of battery and servo sizes make it near impossible to reduce the size. As beautiful as it is, it just didn't offer enough value in what it did to justify the price.
In other words, it lacked bang for the buck.
The project isn't a total loss, as we did learn some wicked cool PCB fabrication techniques we're bringing into other designs, and we learned how to identify shortcomings in a project much earlier in the design phase. Unfortunately, until we can come up with a less expensive to build Sharkbot, it's going to remain a shelfbot.
Our website has been upgraded to a new server, so please be kind and forward any glitchs or problems to Andrew.
We are going places! And coming back! And going again! Does that sound familiar? I think I said that before. Yeah, that’s what we do, we are unstoppable indeed. In this case, we are very excited to be going to the Open Hardware Summit at the Massachusetts Institute of Technology as a really soon – on […]
Besides introducing a whole new batch of Push-Pogopins (and their measurements) into the 'misc' category, we've just introduced our 'D2' Germanium Diode. This diode is pretty good - better than the 1N270 and 1N34 types, with a voltage dropout of only 0.36V at 50mA! We're not exactly sure what type it is, but since we […]
I'm Dilan, a relatively new hire here at Solarbotics, and I am in charge of product development and R&D support. I've got tons of experience with many things, and have seen Arduino as a staple in many projects here at Solarbotics. With its ease of use, powerful programming language, and vast online community, it has […]
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Warning: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Please visit www.P65Warnings.ca.gov for more information. This item was manufactured prior to August 31, 2018.