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Multi-Trigger 3+ Kit, assembly required



For MT3+ accessories, click here.

Multi-Trigger 2 control box

Control box above; cables below

Microphone cable Interrupter photogate cable
Microphone Interrupter photogate

The Multi-Trigger 3+ (MT3+) is an upgrade from the Multi-Trigger 3. The Multi-Trigger 3+ has all the same inputs and outputs as the Multi-Trigger 3, supports the same sensors, has the same convenient dial-in controls for delay and timeout, and, in addition, includes an input for a TTL source. This allows one to trigger the MT3+ with a low-voltage pulse such as that provided by an Arduino or other microcontroller output. Here is a list of features:

  • all components hard-wired for durability
  • operates either on a 9V battery or an optional 120-240 VAC to 9 VDC adapter
  • LEDs to indicate power on, photogate alignment, and event triggering
  • inputs for microphone and photogate sensors as well as external triggers
  • optically-isolated input for a low-voltage trigger pulse
  • fine (up to 0.05 s) and coarse (up to 0.5 s) delay adjustments
  • selector for one of two delay ranges (0 to 0.5 s or 0 to 0.05 s)
  • continously-variable timeout setting up to 1 s
  • instant and delayed optically-isolated outputs for cameras
  • instant and delayed outputs for flash or wireless transceiver, protected up to 400V
  • instant and delayed low-voltage pulse outputs

The MT3+ kit includes all the parts for the control box, the microphone cable, and the interrupter type of photogate cable. This is the cable one would use in conjunction with the AstroSplash Drop Controller to capture drop collisions. The variable-width type of photogate cable can be purchased as an accessory. Also see the accessories page to order the optional 9V AC/DC adapter.


The Multi-Trigger 3+ kit with control box and sensor cables requires assembly. Experience in wiring, soldering, and troubleshooting electrical circuits is assumed. Additional information:

$79.95 - Multi-Trigger 3+ Kit, unassembled


What else is needed

  • In order to trigger a flash unit or wireless transceiver, select a flash trigger cable kit.
  • In order to trigger a camera shutter, select the shutter cable for your camera.

See below for options.

Flash Trigger Cable Kit (3.5mm type)

Hot shoe adapterThis kit is for preparing a cable to connect the flash output of the Multi-Trigger 3 to a PC jack. The kit includes a PC-type connector for the flash, a 3.5mm mono plug, 3-ft of 2-conductor cable, and heat-shrink tubing. Assembly is required. If your flash unit doesn't have a PC jack but does have a hot shoe, the hot shoe adapter shown to the right can be used together with a flash trigger cable for flash triggering.


If your flash unit is one of the Vivitar models 283, 285HV, or 3700, you'll need a Vivitar PC-1 cord to connect to your flash unit. Click here for one possible source. If you're triggering your flash wirelessly or your flash unit has a 3.5mm synch jack, see this page for 3.5mm cables.

PC flash trigger cable kit with 3.5mm plug PC flash trigger cable with 3.5mm plug

PC cable kit with 3.5mm plug,

unassembled - $4.95

PC flash trigger cable,



Select a flash cable kit $4.95), a hot shoe adapter ($9.95), or a combination of flash cable kit ($13.90). The latter combination saves you $1 over purchasing the items separately.

Select option

Shutter Cables


We provide shutter cables for most camera makes/models for use with our triggers. When you order a shutter cable, we include an extension cable and adapter, if needed, to convert the cable for use with the 3.5mm stereo jack on our triggers.


Select your camera make/model below and note the corresponding ID. If you don't find your model listed, compare the socket on your camera to the photos below. The photos will enlarge by clicking on them. If you are still unable to determine the type of plug that you need, please contact us. If you already have a shutter release and want to convert it for use with our triggers, this page may help.


All shutter cables, which include extension cords and adapters (if needed), are $12.95.

Plug ID

Plug ID

Camera Make/Model Plug



Canon EOS Rebel series, T/X series, EOS 60D, 70D, 100D, 300D, 350D, 400D, 450D, 500D, 550D, 1000D, Powershot G series; Pentax K10D, K20D, K3, K5, K7 RS-60E3 plug



Canon EOS 5D Mark II/III, 10D, 20D, 30D, 40D, 50D, D30, D60, 5D/6D/7D, 1D/1DX, 1D/1DS Mark III, 1D Mark III, 1D Mark IV RS-80N3 plug



Nikon D1/D2/D3/D/D4/D5 series, D100, D200, D300, D300s, D500, D700, D800, D800E, D810, D810A, D850, F5, F100, F90, F90x; Kodak DCS-14N; Fuji Finepix S3pro, S5pro Nikon MC30 plug



Nikon D90, Df, D610/750/3100/3200/3300/5200/5300/7100, Coolpix 7700/7800, Coolpix A Nikon MCDC2 plug
S1 Sony Alpha A99, A100, A200 ,A290, A300, A350 ,A380 ,A390, A450, A500, A550, A580, A700, A850, A900SLT-A33, A55, A65, Minolta Maxxum 5D, 7D, 7, 9xi, 7xi, 5xi Sony S1 plug
S2 Sony ILCE-7 / A7R / NEX-3NL / A5000 / A6000 / A58 / A3000 / HX300 / RX100II Sony S2 plug
CB1 Olympus E1, E3, E5, E10, E20, E300, C7070, C8080 Olympus CB1 plug
UC1 Olympus E620/E520/E510/E420/E410/E400,
SP-510UZ / SP550UZ / SP-560UZ / SP-565UZ / SP-570UZ / SP-590UZ / SP-810UZ
XZ-1 / SZ-30MR / SZ-20/SZ-11 /
E-P1 / E-P2 / E-P3 / E-PL1 / E-PL2/E-PL3 / E-PM1 / E-PM2 / E-PM3 / E30 / EM-5 / EM-1
Olympus UC1plug

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