We assemble trigger circuits on breadboards and test them with a Vivitar 283 flash unit. You'll need to provide a 9-V battery to power the circuit. The circuits are designed
to work with flash units and cameras that require a simple circuit closure for
triggering. You'll also need a cable to connect the trigger circuit to a flash unit. The cable isn't provided but can be purchased separately here. If you want to connect the trigger to your camera, you'll need a Camera Opto-Switch to isolate the camera circuitry from the trigger.
We ship assembled circuits in sturdy cardboard boxes
that resist crush. Bear in mind that components can be dislodged in transit and in use. That's
the nature of a breadboard circuit. We'll be happy to correspond with you
about fixing tech problems that may arise in the initial use of the circuit.
a sound trigger, photogate, and delay unit wired on a single breadboard.
The delay unit includes both coarse and fine controls
of the time delay. Two different style photogate sensors
are included. One of them is the SPG1 style with variable separation
emitter and detector for flexibility in positioning.
The other is the SPG2 interrupter that is convenient
for drops and splashes. Indicator LEDs show when the
photogate and outputs are working. Click on the images
below to see larger images of the photogate cables
supplied with the Multi-Trigger.
Delay Unit, assembled
All of the combination kits use the same delay unit,
shown to the right. There is coarse and fine control
of the delay interval, both immediate and delayed outputs,
and an indicator LED for testing the outputs.
Sound Trigger with Delay, assembled
The completed circuit for a sound trigger with delay
is shown to the right. Click on the photo for a larger
Variable-width Photogate with
Interrupter Photogate with
The SPG1-DU-A and SPG2-DU-A
use the same circuit board but different photogate
cables. Click on the photos to view the circuit board
and the cables.
Light-activated Trigger with Delay, assembled
The light-activated trigger comes with the phototransistor
soldered to a 2-conductor cable.Click on the photos to view the circuit board
and the cable.
Sound Trigger, assembled
This is our simplest circuit. Click on the photo for a larger view.
Variable-width Photogate, assembled
Interrupter Photogate, assembled
The SPG1-A and SPG2-A use the same circuit board
but different photogate cables. Click on the photos
to view the circuit board and the cables.
Light-activated Trigger, assembled
While the photo shows the phototransistor mounted
on the breadboard, your assembled unit will come with
the phototransistor soldered to a 2-conductor cable as shown in the lower photo.