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Some cool 9. euromillions +80 % images:

SB-80-DX flash_timing in TTL mode


Image by fotoopa
Timings are ready now. The table show the values between 1/256 power and full power. Using the Puls LA timings for driving the TTL mode gives the right output power.
On the LA you see the X and Q signals. X signal is here 15 usec width and Q signal 25 usec. The delay value between the X and the Q signal define the correct output power.

The X signal need to be more then 10 usec or the flash d’nt works. Large puls is not critical.

I’ve tested the recovery time, this is the time to start a second flash cycle. This critical time is for this SB-80-DX near 40 msec. This means that only near 50 msec a second flashpuls can be generated. For my waterfigures I need pulses between 1 and 5 msec. So I need 2 different flashes if I will use this option.

For wireless control you have to setup first the powerlevel remote via a protocol.
There after you can give via the RFM12B module a command to fire the flashes. In case of SC-27 Nikon cable (remote TTL cable) you only need to give the X and Q puls at the right time.

Very easy, and lowcost central remote control of all your flashes!

For the connection signals see: www.flickr.com/photos/fotoopa_hs/3715377259/

Photo of the setup: www.flickr.com/photos/fotoopa_hs/3709619306/in/photostream/

Remote delay RFM12B at max baudratespeed and optimal syncmethode see: www.flickr.com/photos/fotoopa_hs/3762346539/in/set-721576…

I build a prototype Master with the RFM12B wireless module. The master can also drive local 3 flashes in TTL mode and have an extra LCD display of 2×16 char. The master transmit also the signals to the slave ( slave have 4 flash outputs in TTL mode). Master and slave flash signals are so calculated that all the flash powers are centrered even if the powers are different. This is very important for very highspeed systems. If flashes are not centrered blur into the highspeed capture may happen.
For shema and layout of components see:

www.flickr.com/photos/fotoopa_hs/3896289984/in/set-721576…

Most of the parts are now soldered on a board to put into a nice box. Within a few days the hole unit will be ready. Picture will be follow.

Update 2009 Sep 21:
new timings are added for the SB-29-S ringflash and some others are updated. The new results stay on:
www.flickr.com/photos/fotoopa_hs/3940946688/

westbound I-80 approaching State St


Image by CountyLemonade
This is 2009 signage from I-80 east of the I-15 / SR-201 interchange. For some reason, series E was used rather than E(M). Doesn’t look too good for street and destination names, to be honest. Also note the extra-ordinary (but not extraordinary) outline US-89 shield.