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electronics

Powerful motion control in many useful ways. Arduino inside
Hi all!   Even late I wish you all a happy new year and now we're closing this long call for review. Read more

Need help with basic electronics

Hi again,

I was hoping someone might help me out with an electronics thing.  I've got a small camera with a button to turn it on etc.  I've soldered 2 wires around the button, so when I touch them together it "presses" the button - this works as expected.

robot battery switching

Hi there,

I'm making an arduino robot with 2 identical lipo batteries.  The robot runs off one battery, and when that battery gets too low it will switch to the 2nd (fully charged) battery.  It will then make it's way to base and swap the flat battery with a fully charged one, so it can switch back when the 2nd battery is low.

Can you guys give me some guidance on the best way to go about building something like this.  I'm thinking of use a latching relay to switch between battery 1 and 2, and a voltage level detector to know when to switch.

Electronics

Once, while I was learning electronics, some people requested me to write up so that we all can learn together. Better late than never, I'll do it now.

I've recently joined an engineer institute(BTech) after high school and Electrical and Electronics is one of the subjects here. So, i'll post according to my progress.

Hope you like it.

UPDATE 08/02/2014 : Just an update in the name. I remember OddBot calling it the BlueTacBeast. There you have it! I present to you BTB aka BlueTacBeast aka a mini … Read more
Hello LMRians, This is a PID implemented line follower using an Arduino ATmega168 clone, Pololu QTR-8RC sensor array, a Pololu TB6612FNG Motor Driver, and super … Read more
Solves a non-looped line maze
Using a
UPDATE : 5/24/2014: New video added ( with path shortening ) This was my 2nd robot. Back then, I had built it to solve a line maze but there wasn't a path … Read more

beginer in electronics needs to program

hi, im a twelve year old boy who is not an expert  AT ALL, but knows the basics

i've made bristlebots, speaker tones, dc motor cars  and other stuff

BUT

when i have to program  in arduino UNO i just copy other codes from other people

cause...  I dont know how to program at all!!!! i think arduino's language is c,and i don't know  how to program

 

anybody knows how to program arduino

and can give me a little tutorial about key words and etcetera like setup, delay, control of dc motors sensor etc...

Teach Kindergarden Kids about Chemistry and Electronics
Do you want to make it possible for a kid to make electronic circuits?    Make Squishy Circuit play dough and make up some challenges. Do you want to teach your … Read more

Hackerspace Pitesti

Hi , here we go for a new hackerspace in Pitesti , Romania and we have already a place for working but we need money for tools

 

So we started a campaign on Indiegogo for financing this , maybe you can help!!! 

Please like an share , you can help.

 

 http://igg.me/p/279590?a=1184660

Does your bedside table give light when you open it? In a discussion with a carpenter about his furnitures I asked about the usage of electronics in his creations. … Read more
Inspire Kids about Robotics
Inspired by the community forum we had at the Campus Party in Berlin I went on and created a little robot build course for kids in the age of 12 to 16. Since … Read more
Regulates Voltage from 12V to 5V
One day every geek finishes something every other geek finished too: Hack a Mint Tin. Here is a voltage regulator that is hacked into a Mint Tin. In goes 12V, out … Read more

Yet another ambitious beginner robot project

I'm planning of building a small Arduino-based robot, but it seems there is a lot for me to learn. I'd be grateful of comments from more experienced and knowledgeable people. I consider myself an absolute beginner on electronics front, though I do know some of the basic electrical components and connections. I'll start with some questions.

Recently, I bought the Seeed Studio SD Card Shield from Radio Shack for a decent price, around $13.00. It's composed of a shield with an sd card in which you cna … Read more
My next creation's approach is to be a socially interactive humanoid robot. The work is currently in progress.
Using a
    S.I.H.RO 1.0 (Socially Intelligent Humanoid Robot Version 1)  is going to be an autonomous and learning humanoid robot that can interact with others … Read more

Choosing a transistor

I've used two types of NPN transistors in the projects I've done so far and I've tried to investigate why, but my conclusion just doesn't seem to make sense (actually, I'm not sure if I've reached one...).

For use with an Arduino, I've used a PN2222 transistor:

 

Whereas, for BEAM solar bots, I've used the 2N3904:

 

Arduino servo

Hi

I tried to build a photovore using and arduino and tested it via usb cable,so far so good the system worked as intended as soon as i plug my battery via the dc connector the servo worked but extremly slow why?

Vote for my Club Jameco Project

I submitted a project to Club Jameco. If the project is approved, Jameco will produce and sell it as a kit, and I'll get a commission fee based on sales. Yay, money.

 

It's based on a design I came up with years ago. Pressing buttons and moving switches turns the lights on. Which button and switch does what changes based on how you have the switches set. It's a fun little toy.

So rusty

Ok so I'm still waiting on all my new parts to arrive, in the meantime I'm thinking I should warm up the ol' grey matter engine and unrust my electronics knowledge. Can anyone recommend a tutorial site or ebook(s) (I used to have the '80s booklets from Radioshack on beginning electronics, can't find them though) that is geared more towards robotics? Primarily anything that would help with PICAXE or Arduino based microcontroller interfacing.

AD & DA converters - at a total loss.

I'm doing some non-robot project to learn more electronics. And boy have I got a lot to learn!
Right now I'm trying to take an analog signal, convert it into 8bit digital info through an AD converter, and then back to analog using a DA converter.

navigate in various ways, teach me about robotics
Using a
Hi! MAEP 2.0 is the second version of MAEP (please check it out if you haven't already). I won't go into all the details about things that are the same as the … Read more
Scroll the text without using any controllers or other components on the matrix except the arduino/picaxe and the matrix, and ya dont forget the current limiting … Read more

Vex Electronics

This is just a tip (which I learned today through others on this site, thanks guys)

All Vex electronics are self regulated.

Which means that even though they say you must use their battery's, you can run any battery between 6v and 12v without drama.

 

For example, I'm running a 12v nimh 5000 pack on my robot with a regular Molex/Tamiya connector.

https://www.robotshop.com/letsmakerobots/node/27575