Jump to content
Bevanj

El-cheepo Nauticam Optical trigger

Recommended Posts

Hi Bevan:

 

Any chance you might publish the circuit diagram and parts list, so it can be adapted for other uses?

 

Many thanks, elias

Share this post


Link to post
Share on other sites

Hi Kraken,

I could do... let me give it some thought. It took me quite a while to design and tune the circuit for optimum performance.

Also, all of the components are only available in tiny packages like SOT-23 which there is pretty much no way to use without hot air soldering and custom designed PCBs.

In short, it is some schmitt inverters, logic gates, and an RC circuit to control the time length the LEDs turn on for when triggered.

I've got the Canon E-TTL protocol completely worked out now, and can get a Attiny chip to read the communication (MOSI/CLK) from a 5dmk3 to a 580EX2 speedlight and give the correct output responses (MISO) - proving my modeling of the protocol is correct. It is incredibly similar to the SPI protocol, but I have had to do some trick work to get it to function correctly with the Attiny chip.

I've also tested this protocol model with other Canon cameras my family own such as a 7Dmk1, 20d and G12 - it successfully works for all of them. Now I just need to design a circuit board to fit in my housing...

Bevan

Edited by Bevanj

Share this post


Link to post
Share on other sites

Hello Bevan,

 

Very interesting. I'd like to try it with my a7RII, with the LEDs on two short stalks to mate with a custom fiberoptic interface window. Any way I could get one?

 

Thanks,

 

Dave

Share this post


Link to post
Share on other sites

Hi, I will be interested to get one for 500d canon... Please advice!!

Thanks


Sent from my HMA-L29 using Tapatalk

Share this post


Link to post
Share on other sites

At my wits end with commercial triggers.  Are you still making these? Interested in one for a Nauticam A7R2.

Share this post


Link to post
Share on other sites

Hi HCldiver, 

Sorry - I've been being slack at keeping an eye on the thread I started.

Sure, I can make something that will hopefully fit your A7R2 housing and be cheap and reliable. 


Fire me a PM. 

Bevan 

Share this post


Link to post
Share on other sites
On 10/14/2018 at 3:21 PM, jviss said:

 

On 10/14/2018 at 3:21 PM, jviss said:

 

Triggerfish (Drywh) on Jan 18, 2019,  pages one of this subject, posted two photos of  a simple and ingenious trigger.  From it I have extracted a Parts List to encourage others to design and build their own boards, hopefully more sophisticated ones, and of course, tell us about them:

T6 LED, two, available as CREE XML T6 LED's on eBay.  Mouser Electronics, Digikey and similar may also sell them.

23A-12V battery, the Duracell 21/23 model may be the best.

TIP-22 transistor from Mouser or Digikey electronics.

Roer RS black part shown in photo may be a Roer RockerSwitch, needs clarification.

Resistor 1K

Cable mini connector, need suggestion.

Board and mount for the LEDs and components.

Hot Shoe mount - A design is needed.  Please make suggestions, additions and corrections to the above.

  Let us hope other knowledgeable Wetpixelers will design and publish simple triggers and TTL boards. 

 

Edited by Kraken de Mabini
Edit

Share this post


Link to post
Share on other sites
On 2/16/2020 at 7:27 PM, Bevanj said:

Hi HCldiver, 

Sorry - I've been being slack at keeping an eye on the thread I started.

Sure, I can make something that will hopefully fit your A7R2 housing and be cheap and reliable. 


Fire me a PM. 

Bevan 

Hi Bevan,

Just wondering if you are still making the trigger, looking for one for a Sony A6300.

Have sent you a PM.

Thanks!

Share this post


Link to post
Share on other sites

Sponsors

Advertisements



×
×
  • Create New...