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Photogate Trigger Kits, unassembled
SPG1 and SPG2
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Above: Assembled photogate circuit on a breadboard. |
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| Click on any image for a larger view. | |
| Below: The two types of sensor cables. | |
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SPG1 cable (variable width) |
SPG2 cable (interrupter) |
The Photogate Trigger comes in two versions. Both versions use the same breadboard circuit. However, they have different sensor cables as described below.
Variable-width (SPG1). 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.
Interrupter (SPG2). The emitter and detector are housed in a single interrupter-style unit. The interrupter, shown to lower right, has a slot of fixed width between the emitter and detector posts. The separation of the posts (5/8" or 1.5 cm) is wide enough for liquid drops and small projectiles to pass.
The kit includes 3 feet of 3-conductor cable to extend the emitter-detector pair to a location away from the breadboard.
Additional requirements:
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A 9-V battery or AC/DC Adapter is required to power the circuit.
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A cord is required to trigger a flash unit. Click here for trigger cord options.
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In order to trigger a camera, see the Camera Opto-Switch or this DIY method.
An electronic delay unit is commonly used with the photogate to achieve timing synchronization. You receive a $1.00 discount when purchasing an SPG trigger with a delay unit. To order this combination, go to this page.
When purchasing a SPG kit with a breadboard, there is a $1.00 savings over buying a kit and breadboard separately.
You can purchase this kit assembled.
Click here for more information or below to order.
You can purchase this kit assembled.
Click here for more information or below to order.
