Arduino Lexan Case

April 3, 2010

I had some extra lexan laying around from an old project so I figured I would build a box. It’s not exactly square but it accomplishes the task of keeping it safe from.. Lexan stops bullets right? (jk)

I still need to attach a hinge and clean up the top to match the completely uneven box. I drilled holes for the USB VDIP1 Module im using to access a flash drive and I put in holes for the Arduino power supply and USB UART connections.

Parts before I started

Parts before I started

Added HInges

Added Hinges

Hinged Open

Hinged Open

I managed to get my 5920 on my breakout board. It took about 17 minutes which I am quite proud of. This is the LED driver I picked up from SD Electronics last week. It lets you control a number of LED’s at once. I am using it to control a number of motors rather than LED’s using H-Bridge chips to power the motors. It should work but I haven’t completed the schematic yet just going to try for a prototype to see what happens. Fingers crossed I don’t wreck an H-Bridge those things are expensive.

The other chip I ordered from Texas Instruments is the 5940 which was shipped two days ago so I expect that to arrive soon. I am quite excited to see the differences between the two considering how close they are to one another.

Here’s a before and after of the soldering.

Before I started.

Before I started.

Work area

Work area, R2-D2 supervising.

Completed Solder

Completed Solder

I hope there is never a shortage of rosin flux or I’m gonna be in trouble.

To Build a Robot Part 1

March 25, 2010

Doing a bit of research on what is needed I picked up a few parts that are needed for the project I want to do. I would like to put together a bipedal robot that balances. I have some strange ideas on what will make a good design but the basics come first. Today I stopped by San Diego Electronics Supply for some parts.

San Diego Electronics Supply

San Diego Electronics Supply

It’s a bit scrubby but the people working there are super nice and very knowledgeable.

I got:

  • 4x 4066’s to for the RX / TX on the serial.
  • TCL5920 to make more PWM pins available
  • 2x 2N3904 Switching Transistor to act as the switch for the 4066’s
  • 2x L293B H-Bridge chips to control the motor current from the 5920.
  • 1x 4051 to give me more sensor pins for rotation sensors

I will try out the L293’s tonight with one of my DC motors.