The AstroSplash Drop Controller produces a timed-sequence of 1 to 3 pulses that can be used to activate 1 to 3 solenoid valves to release a sequence of water drops. The AstroSplash has the following features and functions.
Two calibrated pots to adjust pulse interval
Time intervals between pulses are smoothly variable from 8 to 120 ms.
Three calibrated adjustment pots to adjust pulse duration
Pulse durations are smoothly variable from 8 to 120 ms to adjust the drop volume.
Two on-off switches for pulses
Pulses 2 and 3 may be switched on or off in order to select a sequence of 1, 2, or 3 pulses.
Three valve outputs
One to three valves can be controlled simultaneously.
Push button to hold valves open
Holding the button down clears the water path of air.
BNC test port
An oscilloscope can be connected for precise timing calibration (optional).
The trigger initiates the entire timed sequence of pulses and camera operation.
Camera ouptut (optically isolated)
When a camera is connected, the trigger opens the shutter at the onset of the first pulse. Optical isolation protects the camera's circuitry from that of the AstroSplash.
Auxiliary outputs (optically isolated)
Two more outputs may be independently used to control additional devices such as cameras, flash units, and wireless transceivers.
Jack for 12V DC power
The unit is powered by a 12V/2.1A DC regulated supply. A fuse inside the box provides protection from overload.
On-off switch/LED indicator
A switch turns the power to the box on or off, and an LED indicates the on state.
Three LED pulse indicators
An LED corresponding to each pulse flashes when the pulse is produced.
The PC board used by the AstroSplash is shown to the right. Locations of components are labeled. Holes are labeled to aid in making connections to the lid of the control box.
The PC board is bolted to the lid of the project box. This reduces the possibility of breaking connections when the box is opened. The photo shows the interior of the assembled unit.
A label printed on photo-quality paper is provided together with a laminating sheet to make a distinctive and functional label.
You may use your own solenoid valves with the AstroSplash or purchase ours. If you use your own valves, they must operate on 12VDC and have a maximum rating of 6W each. Our valves are packaged in kits with fittings and the parts to make a cable to connect to the AstroSplash.
The AstroSplash operates on 12VDC supplied by a wall transformer. You may purchase a transformer from us or use your own supply as long as it provides a regulated 12VDC at up to 2A.
Synchronizing your flash units with the collision event requires a photogate and a delay timer. Our Multi-Trigger 3 or the earlier Multi-Trigger 2 serve this purpose well.
The AstroSplash will control up to 3 valves simultaneously. The photo to the right demonstrates the timing precision possible. Additional valve kits can be purchased separately.
Note that the products we offer for sale include the electronics of drop production and detection, timing, and control of camera and flash. We don't provide the water reservoirs and scaffolding to hold the parts of the water path in place. See Components of a Drip Photography System for a listing of what you need for a complete drip system.
You may purchase components of a drip system individually, or you may purchase them in various combinations at a discounts. When you purchase, don't overlook the cable options. Cables are needed for camera and flash. For additional accessories, click here.
Drip production and control components
Get $20 off when you buy the Multi-Trigger 3, AstroSplash, Valve Kit, and 12V transformer together.
$169.80 - DS2
AstroSplash Drop Controller
$74.95 - ADC
Get $15 off when you buy the controller, valve kit, and 12V transformer together.
$104.85 - DS1
Valve Kit only
$29.95 - VLV
12VDC Wall Transformer
$14.95 - A12V
Drop detection and event synchronization components
A shutter cable is required to connect a camera to the CAM port of the AstroSplash. Here's our selection of shutter cables.
We provide shutter cables for most camera makes/models for use with our triggers. When you order a shutter cable, we include a 6-ft extension cable as well as an adapter 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, are $9.95.
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
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
A trigger cable is needed to connect a flash unit or wireless transceiver to the Multi-Trigger 3. Select a cable with a 3.5mm plug.
Flash Trigger Cable Kits
These kits are for preparing a cable to connect the flash output of one of our trigger circuits to a PC jack. The cable kit with 3.5mm plug will work for the Multi-Trigger 3. The cable kit with RCA plug will work for the Sound Trigger 2.
The flash trigger cable kits include a PC-type connector for the flash, either a 3.5mm mono plug or RCA 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.