PC Board Design
PC board design and parts list for the Mini Halfwave DC driver board

I used a FREE product called  PCB123 downloaded from the PCB123 web site and I have the board's latest design in a file available here for download.  If you want use PCB123 program to order boards, it shows a cost of $8.19 each using the PCB123 program for a quantity of 20. If you order less it costs more. It is a pretty slick program that lets you order them online from  the boards plan. I have not used them yet so I can't give a testimonial for them. 

Parts List:

2 - SCR   NTE5453 from Mouser or  T106A1-ND from Digikey
 
2 -Opto Isolator  MOC3010 from Mouser or Digikey

2 - Resistors  100 ohm 1/4 watt common anywhere.

1 - Dip header connector for the R2CL is Mouser #
649-68691-172  Mfg. is Bergstick. These are nice gold plated and have .318 long pins.  Being 72 pins you can get 3 sets out of one connector, or a common dual breakaway header will work.

1 - Screw Terminal connector is ED2234-ND for Digikey or Radio Shack 276-1388

1 - Lionel R2LC Receiver Module from Digital Dynamics or TAS Studio.

1- Mini Slide program/run switch. Common anywhere or Radio Shack 275-406 

Click Images for Larger View

The Board Dimensions are 1.8" by 1.3"

 

X-ray View showing top and bottom traces.

 

Looking from the bottom, the bottom traces   Looking from the top, the top Traces