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SPG1-DU or SPG2-DU. Schmitt Photogate-Delay Unit Package

This package includes the parts to build a Schmitt trigger photogate (either SPG1 or SPG2) and an electronic delay unit.  There is a $1.00 discount from the price of both kits purchased separately. There is an additional $1.00 discount for purchasing the combination with a breadboard.

When built on a breadboard, the completed circuit will look similar to that shown. Click on the photo for a larger view.

For descriptions of the photogate and delay unit kits, go to these links: 

SPG photogate kits                DU electronic delay kit

SPG1-DU  Schmitt Photogate-Delay Unit Package 1 - $13.00

SPG1-DU-BB  Schmitt Photogate-Delay Unit Package 1 with Breadboard - $18.00

SPG2-DU  Schmitt Photogate-Delay Unit Package 2 - $13.00

SPG2-DU-BB  Schmitt Photogate-Delay Unit Package 2 with Breadboard - $18.00
New item:  We are now providing an upgrade kit for the SPG1-DU-BB and SPG2-DU-BB circuits. The upgrades include indicator LEDs for both the photogate and the delay unit in order to allow you to determine if these are working correctly even without attaching a flash unit. The upgrade kit also provides a way to give more precise control of the time delay.
 $1.35 each
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