projects:flash

Camera Flash Control

CableShoeFunction?VoltageWire
ShieldGGnd 0
RedF1Fire1.66Vdc3
WhiteF2flash ready signal / data2 Hz signal 1-5V (0V when charging)2
BlackF3TTL OK signal / clock1.06V (0V when charging)1
Flash Duration
0.1ms delay
27 to 28msone tube
13mstwo tubes
11msthree tubes
8msFour tubes

0.2-0.4ms pre-flash

120ms later, 0.64ms main flash

0.16 ms(1/16 power)

0.235ms (1/8 power)

0.43ms (1/4 power)

0.67ms (1/2 power)

4.25ms (full power)

Minolta 1200AF Specs

Hotshoe Pinout

Nikon Flash Controller

http://www.voitzsch.net/index.php/en/flashconv-a-minolta-flash-converter

According to sds.com the Control unit 80px has a thyristor and adjustable light output.

Quench info

http://code.google.com/p/strobist-project-opensource-trigger/wiki/HardwareDocumentation

http://www.flickr.com/photos/fotoopa_hs/3715377259/ http://www.flickr.com/photos/fotoopa_hs/3709381751/

What to do next?

  • Hook up a logic analyzer to the modulating signal
  • Use a microcontroller to try grounding the TTL OK signal, or applying a few volts, after firing the flash.
  • Open up the flash
  • projects/flash.txt
  • Last modified: 2014/11/13 10:50
  • by 127.0.0.1