50$ Robot 9v battery

[E.Man.Lava]

in the 50$ robot tutorial, it talks about the use of a 9v battery, but it doesnt explain (at least not in a way that a major newb like me could follow and still get a good nights sleep, LOL) what its for or where to solder it in.  Where do i solder it and what does it do?

[Steve Joblin]

you don't solder wires to a battery... you use a  9 v battery snap... they look like this: http://www.swe.org/iac/images/battery_lg.jpg

As to what a battery is... it supplies power.

[ed1380]

let me explain it to th best i can.

you have 2 options.

1- everything powred by a 4.8 - 6v battery
2- electronics powered by 9v battery and servos by 4.8 - 6v battery

in option 1 you do it normally.

in option 2 you do everything normally, but do not solder wires to the servo power bus. and later attach a 4.8 - 6v battery to the servo power bus

hope that helps. let me know if you need a better explination on something

[E.Man.Lava]

can you explain option 2 again?
 

[ed1380]

i found this pic

[E.Man.Lava]

what connection am i not supposed to make?

[ed1380]

where teh green x is. do not connect those 2 pins.

then connect the 4.8-6v battery to where it says AA

[garriwilson]

Hey, I'll try to help. OK. Remove the connection OR don't make the connection that has the green X over it. The connection you have to remove is also glowy green. AA power is the red wire, AA ground is the black wire. The power bus on the outside is the ground (black wire is soldered there, anywhere on the bus doesn't matter which pin) and the power bus closer to the microcontroller is power (solder the red wire there).

Hope that helps.

-Garri

[JessXe]

I have a question on this also, I connect the + end of the large black capacitor to the + from the 9V battery right?  I want to be sure because, that is what the schematic says but the image makes it look like that connection wouldn't be made.

thank you.

[Admin]

I have a question on this also, I connect the + end of the large black capacitor to the + from the 9V battery right?  I want to be sure because, that is what the schematic says but the image makes it look like that connection wouldn't be made.

Yeap. You can also put a big cap on both if you want.