| 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
| 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.
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