Current Part:
100nf Capacitor
8x 1n5822 Diode
LM317
L297
L298
DC Power Jack
Breadboard Wire
Red LED (5mm)
4x Dual Terminal Blocks
Resistors: 10Ω, 240Ω, 360Ω
Resistors: 370Ω, 11kΩ
Steel Standoffs
Solder
Soldering Iron
Copper PC Board (3"x5")
Parts List Details
The board will require all of the parts above. Later in the schematic you will see how they are all interconnected and where exactly they will end up on the board.
L297 and L298
These two pair together perfectly for controlling a stepper motor. In fact if you check out the datasheets for these two devices (which I strongly recommend) you will see that they have some schematics already made for connecting these two devices together.
LM317
This is the voltage regulator that will be used on the board. Specifically we need +5v going to the L297 for the digital side of the board. The L297 uses +5v to send the approriate control signals on to the L298.
Soldering Station
Since the board is being made from scratch you are going to need to drill the holes out and solder all the parts in by hand. Since all parts are through-hole, the soldering skill required is still at the amateur level, but you can still make mistakes and solder something in backwards. Double check everything!
Copper PC Board
The PC board used in this tutorial was standard 1-side copper clad pc board. 3" by 5" in size. There's not tricks here, any type of pc board will work as long as its copper that can be etched away with ferric chloride.
Resistors, Capacitors & Diodes
The rest of the pieces for this board are the current sense resistors, RC circuit for the L297 'clock' and some voltage dividers for the voltage regualtor. The big 1n5822 diodes are used on the output to the motor as part of a protective circuit so you don't mess up the motor or the board.