This article is part of a series.
- Part 1 - The Hunter S. Thompson Board -- Arduino Mega Mini
- Part 2 - My Eagle PCB Walkthrough
- Part 3 - This Article
- Part 4 - My Eagle PCB Walkthrough
- Part 5 - Populating and Programming and APM
- Part 6 - Arduino to RPi -- Galvanically Isolated I2C
- Part 7 - Incomplete Works
- Part 8 - HM-10
- Part 9 - Jot
- Part 10 - Homemade Pulse Sensor
- Part 11 - ATtiny Adventure -- I2C on ATtiny 84/85
- Part 12 - ATtiny Bitsy Spider
- Part 13 - Kobold
- Part 14 - Scarab
- Part 15 - The Valdez Mutant -- LPC1114 QFN
- Part 16 - Lab Controller PCB
- Part 17 - Lab Controller v05-09
- Part 18 - Robber Board
Originally posted on www.letsmakerobots.com
I finally got in my Mega Mini Motor (M3) shield that I designed. I was surprised, after populating the board: It actually worked. The board came about after making the Arduino Mega Mini. I noticed I wouldn’t really be reducing the bulk of my bot because of the amount of wiring it would take to get logic to the Arduino Motor Driver shield I was using. Therefore, I set out to design a motor driver shield that would plug right into the MegaMini. I broke out Eagle and some datasheets on an assortment of ICs.
I started out working with the L298D chip, but quickly got frustrated with the way it set on the MegaMini footprint. Plus, the flyback diodes were pissing me off. I had remembered reading that the SN754410 had internal ESD diodes. I started playing with the chip layout and got a board design I was pretty happy with.
I’ll attempt a full write up later;I’m pretty mentally fatigued from learning html/css (I know, easy. But as many know by now, cognitively, I’m as slow as a snail on salt.)