5 more posts in this thread. [Missing image file: 1.png]
I'm planning to build my first boat this summer, a plywood boat.
I've drawn this basic boat, and now I want to know how much it can hold (in kilograms)
My math skills is really limited, but the volume of the boat must be the answer to how much it can hold, right?
So I typed in the measurements of the rectangular shape online and got the volyme of 0,75 m3 (1400 x 1100 x 488)
And then the triangle shaped front, which was 0,14 m3 (500 x 500 x 1100)
So all togheter its 0,89 m3, which should be 890 liters
But I think that sounds REALLY much
Have I done it correctly?
Itty bitty Digispark robit!
7 more posts in this thread. [Missing image file: 2013-06-25 21.40.25.jpg]
/diy/ is pretty awesome tonight. Thought I might jump in. (Sorry if my thread isn't as spectacular as the others.)
I have a couple of Digisparks laying around and I would like to make a tiny lil' robot. I'm thinking it would use a 9v battery and be basically built around the battery itself.
The digispark has 6 i/o pins, which I'd like to set up as follows:
- Left locomotion (pwm)
- Right locomotion (pwm)
- Photoresistor (analog read)
- Microphone (analog read)
- Momentary button (digital read)
- Speaker/LED (pwm)
I'm aiming to make it a cute little thing that can play simple games like simon, rock/paper/scissors, sing along to a drum beat, sing and dance, etc. Fun stuff for entertaining guests and such.
Getting all this to work will be very easy save for the main challenge I'm facing, and why I'm coming to you: I want the little guy to be able to drive around fairly efficiently using only two PWM outputs.
Easiest solution is just to hook them up to small motors for left/right and have it turn by only activating one or the other, but I'm wondering if there's a better way. I refuse to do the forward/back-and-turn trick. I'm wondering if there's some kind of sneaky H-bridge-like shenanigans I could pull, or if I could use pwm magic to coax motors back and forth. Maybe use smart servos with a 'reference' voltage that is compared to the pwm output somehow?
Cheers in advance for the help!
(bonus points to whoever recognizes my garage/workbench first...)
Pic is just some parts piled together in a vague assemblage of what the little guy might look like, minus the motors/servos/whatever drive system we cook up.