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DU. Electronic Delay Kit*
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This kit includes parts for a delay circuit that can be used with our sound or photogate triggers or simply with the closure of an electrical contact to synchronize the discharge of a flash unit with the event to be photographed. Delays are adjustable from about 0.0002 - 0.5 seconds.

If you're also purchasing a photogate (SPG1 or SPG2),  sound trigger (SK2), or light-activated trigger (LAT) kit , you'll receive a discount of $1.00 by purchasing the trigger kit in combination with the delay unit. In that case, click on one of the links below:

Schmitt photogate-delay unit package
Sound trigger-delay unit package
Light-activated trigger-delay unit package

DU  Electronic Delay Kit - $7.00

DU-BB  Electronic Delay Kit with Breadboard- $12.00
*Customers have reported that when using the delay unit outputs to trigger Canon 430ex and 580ex flash units, the flash unit is disabled after each discharge until the unit is turned off and on again. In order to correct this problem, two 1-kW replacement resistors are included with each delay unit and combination kit. These resistors may be used in place of the 22-kW resistors that lead from outputs 5 and 9 of the 556 timer.

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