Старые минолтовские вспышки на цифровых камерах

Товарищ из Германии сделал прошивку для микроконтроллера Attiny13, которая позволяет превратить старую вспышку (испытывал с 5400 HS, но есть высокая вероятность работы и на других, более ранних) во вспышку с поддержкой pre-flash (будет работать на цифре) и нового wireless протокола (удаленно с цифрой).

Как я понимаю, микроконтролер перехватывает управляющие сигналы с камеры и при обнаружении запроса на предвспышку - заставляет вспышку сделать короткий импульс.

схема подключения микроконтроллера

программа для Attiny13

ветка на германском форуме (основная), на dyxum.com (дополнительная)

схема датчика для wireless на тех вспышках, где его нет (типа 5200)

 

Компьютерный перевод последнего письма от автора в германском форуме (проект в стадии разработки, поэтому еще много чего может поменяться):

Project: Lightning adapter for digital Minolta cameras

How?
By means of a ATtiny13-Mikrocontrollers the instructions of the camera "are along-read" to lightning. The adapter releases the Vorblitz on requirement , decodes the illuminated period information transferred thereafter and steers lightning automatically.

Feature
All functions (AFHilfslicht, zoom shot reflector, range announcement) remain, likewise the compatibility with similar cameras (at present only "drying", i.e. without film tested!). Also the lightning announcement in the Sucher (slowly flashing symbol with sufficient exposure) and at lightning ("OK ONE") function.

The adapter offers besides support for new wireless minutes.

Compatibility
Hardware: At present the adapter is successfully with lightnings 5400HS and 5400XI (attitude to the compiling time in the file const.h) tested to the Dynax 7D (5 lightnings - 3 x HS, 2 x XI - at 4 different cameras). Still compatibility problems (Dimage exist releases pre and main lightning, main lightning is however always 1/1-Leistung; Sony releases only one lightning, at present unclearly, whether pre or main lightning). For the 5D there are still no tests.
Software: converted options for 5400XI and HS, adjustment are simply possible to other lightnings (other illuminated period) - the leuchtzeiten are put down in two tables (wireless.def/wired.def). Incrementation 64 stages wire-bound, 32 stages wirelessly. Control differences must be considered if necessary LS in the SOURCE.

Foreign lightnings: in principle possible, a condition is that lightning can be steered via the contacts at the lightning foot (e.g. TTL-OK: a signal releases, a signal stops it) and that the lightning future is < 130ms (naturally not for two full lightnings). Not yet converted.

Connection diagram:


Note: In the above picture is missing still another 10k-Widerstand of CAM_FIRE (pin 5 of the ATtiny) after VCC. This resistance improves noise immunity in the Wireless enterprise.

Source code of the current software:
flashconv-0.8.3 for avr GCC (and/or actually only avr as). The Tarfile contains a project file for AVRStudio (in connection with WinAVR).

The software needs all IO pins of the ATtiny with Wireless support, i.e., in this case the RSTDISBL Fuse must be set. Afterwards no simple ISP programming is more possible, again but the ATtiny must be described over the High Voltage Serial mode (at present only of the STK500 and the HVProg). Therefore, in the file "const.h" the "# DEFINE is recommended WIRELESS" getting along animals. With the instruction "make flash" is assembled the file and burned on the Tiny (, for other programming hardware the Doku too avrdude to read and the Makefile adapt pre-setting of simple parallel haven adapters). Alternatively "make" call and the file rom.hex with any Programmer transferred to the Tiny.

Fusebytes of the Tiny:
without Wireless - fuse high: 0xFB (brown out with 2,7V, everything else disabled); fuse low: 0x7A (CKDIV not set, 9,6MHz, starting UP time all the same)
with wireless - fuse high: 0xFA (2,7V brown out, RSTDISBL), fuse low: 0x7A

From where?
Planning for a finished equipped and programmed plate, which is built firmly by soldering on 8 wires into the 5400er. Layout is, plate ordered. Test, as soon as the plates arrive. Inquiries etc. in the forum or under blitzadapter@voitzsch.net either here. Price is not certain, focused is approx.. 30, - EUR.

Sebi

 

Самое сложное - найти вывод wireless и питание. Остальное все на башмаке распологается. Микроконтроллер включается в разрыв.

 

Самому мне сейчас совершенно не до этого, к сожалению (даже не могу дойти до DG Group и отобрать у них мою 5D, которую они непонятно зачем у себя уже который месяц маринуют). Но вот автор этой модификации сделал с новыми прошивками и описанием.