/diy/ - Do It Yourself

>>490747
not gonna lie, that's part of the reason it's being revised.

anybody know where i can find a circuit diagram of the charger circuit (or similar) used in this project?

http://m.instructables.com/id/DIY-Solar-Phone-Charger-5-Portable-100-Batter/?ALLSTEPS

pic related, built it and am trying to upgrade.

>>396061
http://www.worthpoint.com/worthopedia/rolypoly-roly-kit-storage-box-as-seen-on-tv-roly

>>395214
but i will be switching to these in parallel as soon as i get the draw on the power limited to ~2 amps.

>>395214
I'm not actually sure...

>>394351
there are two motors, one on either side - will report later with what they are and voltage under load.

>>394353
i do not have an oscilloscope. i wrote the code, and thank you for the idea. i will implement this before the next update.

>>394375
more great input. thank you. i used a dremel to give access to the arduino's power input, but haven't used it because i couldn't think of why it would matter. the arduino will be powered via 9v upon next update.

>>394352
i think the voltage would drop, but i haven't measured it yet. the arduino itself can only put out about 50mA (if memory serves me correctly). the ardumoto board has on more than a few occasions handled excess of 4 amps even though it is only supposed to handle 2, so i don't think it has any limiting.

i really have no idea as to what other information should be included with this.

#shameless-self-bump-before-sleeping

it's an arduino uno with a motor driver shield attached that handles the large amounts of current instead of frying the arduino.

when the wheels are not touching the ground and can spin freely, i measure ~1A of current being pulled from the battery.
when i hold the wheels still and tell the car to go anywhere, i measure ~4A.

the motor driver shield is only rated to handle 2A safely.

greetings /diy/

i'm in need of an electronics guru. i am a noob and am still learning the basic concepts.

pic related. it's the car i'm working on. it works fine, for a few seconds, but then it stalls as if it's struggling to pull enough energy from the batter (9.6v NiMH).

any thoughts?

(this post was much longer, but the board thought it was spam for some reason)

this post is a test. this is literally attempt #9 at starting a thread on /diy/. this is only a test.

>>386075
>>386084

but the output from the charger to the 1.2v or 1.5v cell would be 1v?

>>386034
thanks.

correction - 15mA to charge. I'm very sleep deprived right now.

hey /diy/. I'm pretty new to electronics and don't understand half of what google shows me, so i was wondering if you guys could help me. I've got the pictured battery, a use for it, but no way to charge it. i already figured out that I'd need 10mA of current going into it, but I've got no idea what voltage to use or which end to connect to +/- from the power supply when charging.


tl;dr - help me charge a 150mAh 2/3 AA?

>>384955
i see.
are all of those b-damon things as small as the google image results show?

sorry, it made no sense the first time.i read it, but it makes sense now.

only part really worth taking out of old rc cars would be the electric motors.

i just finished an rc project.
wut chu got in mind as far as function?

you know where /fit/ is, right?

sorry this is all I'm contributing.

lighter fluid sucks at this. acetone, turpentine, or gasoline all work much better.

i replace broken screens on phones occasionally. advertise on CL, link inquiring party to site to buy replacement screen, and tell them "here's address, call me when you get screen in mail". only usually get 3 or 4 askers per month, 2 or 3 actually order screen and show up, but getting $30-50 (price varies depending on how much i think person is willing to pay) for 10 mins of work feels pretty nice.

OP, what you're asking here boils down "how can i pirate music in a way that's more difficult than torrenting?"

if you're going to pirate, just do it the easy way.

LAMP server.
typed out huge response but shit didn't post.
sorry.