Let's Make Robots!

External Memory Reader

Oi all,

I was finally going to get my RFID chips (I hope... maybe) and I was thinking that I wanted a way to store a database for RFID tags and actions like a database storring the ID number and if they are level 1 allowance or level 2 allaowance, etc. that way I can not only select what I can allow the person to do in a situation, but I can also easilly add people from my computer or phone (if I use Micro SD). 

Basically I want a way to read a txt file from the root of a data storage device - I'd prefer SD but Thumb drive is my next preference.

Price: $4.5 USD
There are a few models of this but the SM125-IC is an RFID Interigator with read/write capabilities and I2C connection capabilities. I have been looking for a chip … Read more

Who wants to buy an RFID IC that is actually well made?

Oi all it's Tgeahre, your friendly neighborhood RFID Proponent.

I have good news, I found my RFID reading IC and want help getting it. To start, if you didn't read it before, take a look at my component report in node 1417. For those of you excited about RFID, this report will please you.

At the end I have a wonderful little bit about how to purchase it.

Electronic City in Burbank, CA

Oi all,

I though I would post the first REAL shop for some of this stuff. I know that some of you guys are the LA area and some are alsonear Southern California and might someday decide to visit LA. Well if you fill those requirements (or if you don't I am not picky) feel free to drop by Electronic City.

Electronic City
4001 Burbank Blvd
Burbank, CA 91505

Circuit Diagram Programs

Oi all,

some of you might be following the conversation on 780. I am attempting to make a nice diagram on my computer and was trying to find a GOOD PCB or diagram design program. I have now waisted 2 1/2 hours on one that I just had difficulties with. I have a design but don't like it. I think it looks scrammbled and an hour of the time was spent just naming 2 different kinds of picaxe chips the 08 and the 28x1

all help is appreciated as usual

thanks all


7Pin keypad

Oi all,

I decided to play with my keypad. it is a 1-9, 0, *, and # keypad. 3 columns and 4 rows. I got it from the picaxe store (Here) only one difference, there isn't a first or ninth pin. looks a lot like on page 1 of This pdf.

C2-R1-C1-R4-C3-R3-R2 (R = row- C = column)

Has anyone worked with RFID


While I am waiting for my Picaxe28x1 to arive I have been looking at a few ideas that I want to play with. one of which is a device that regularly pings RFID tags to see if they are within the given area and warns the user if they aren't. basically this is used by a forgetful person like a friend of mine in long beach who leaves his swords everywhere when he drinks (which is pretty much always). I know that this whould be easilly done but I cant find any tutorials online dealing with RFID tags besides the ones telling buisness owners how to upgrade their invintory managment.

Choosing how to use the Picaxe-28X

Hey, I'm new to this site - obviously. I created a rather beautiful robot in high school in the FIRST robotics league and worked with the programming, wiring, and mechanics of the robot attached. plus I was the leader of the team. I have also worked with soldering and circuitry in the past but am not perfect at it and I can use a breadbord rather well.