Society of Robots - Robot Forum
Electronics => Electronics => Topic started by: ross75 on November 07, 2008, 06:27:29 PM
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Hi, I just built the board for the $50 robot and it worked, my first ever electronics project so i was suprised!. I figured why not try and use a diffrent chip with more memory and I/O so i got a atmega644. The pins are diffrent so i looked at the data sheet and made my own drawing of what i think the circuit should look like and also added in a rs232 shifter. Can someone take a look and see if i have the right idea? The circles are where wires attach to each other and the components. It's not the best drawing but again im new here.
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Looks like all your IO pins are connected to the regulated 5v supply. If you want to drive current hungry devices like motors/servos then they should have a seperate power supply.
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Thanx, that shouldnt be too hard. It's just a second battery and the + goes to one set of ports instead of the 5v and the ground is shared right? did everything else look ok?
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It's just a second battery and the + goes to one set of ports instead of the 5v and the ground is shared right? (http://It's just a second battery and the + goes to one set of ports instead of the 5v and the ground is shared right?)
Correct
did everything else look ok? (http://did everything else look ok?)
Not used an ATMega644 myself - so will allow others to answer...
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Attached are two images of my 644 board (and actually my first Axon prototype). I lost my schematic, sorry!
Hopefully these should help you a bit.