The HiViz WorkShop
TPG. Transistor Photogate Trigger Kit, Unassembled
This kit includes parts for a photogate that uses a transistor to discharge a flash unit. The circuit can trigger on rapidly-moving objects. The matched infrared emitter and detector have separate housings. This allows the two parts to be placed different distances apart, depending on the application. The maximum separation is about a foot (30 cm). If your application requires greater separations, a red laser pointer can be substituted for the infrared LED.
The kit includes three feet of 2-conductor cable for splicing the output to a PC cord or Flash-to-PC adapter. The latter two items are not provided with the kit but can be purchased separately. See the Product Guide for various connection options. In order to trigger a camera, see the Camera Opto-Switch or this DIY method.
A 9-V battery or 9-V AC/DC Adapter is required to power the circuit.
The kit includes 3 feet of 3-conductor cable to move the emitter-detector pair to a location away from the breadboard. |
Click on the photo to enlarge and to see the photogate cable. |
An electronic delay unit is commonly used with the photogate to achieve timing synchronization. You receive a $1.00 discount when purchasing a TPG trigger with a delay unit. To order this combination, go to this page.
When purchasing a TPG kit with a breadboard, there's a $1.00 savings over buying a kit and breadboard separately.
Purchase this kit assembled. Click here for more information or below to order.
