The HiViz.com WorkShop
Photogate-Delay Unit Package with Breadboard
SPG1-DU-BB and SPG2-DU-BB
Online instructions are provided for assembling the parts into the circuit shown below. (Use the instructions for v10 kits.) Note that substitutions may be made for some of the parts due to changes in the availability of parts from our suppliers.
Parts to assemble the photogate cable are included. Assembly instructions are here.
Photogate cable for SPG1 above and SPG2 below