If you don't have a TTL flash then that is the first light you should buy but learn how to use it off-camera in Manual mode as well as on-camera in TTL mode. bride in white against a white wall) and make Flash Exposure Compensation changes your percentage of usable exposures increases. Once you learn to SEE non-normal situations (e.g. TTL rarely get the exposure right but it usually gets your exposure close enough that you can fix it in post. TTL is great for on-camera flash in run and gun situations where the subject to flash distance is constantly changing. Vac=1+getvalue(_AI,4)/555 'reads in pot and assigns getvac a value between 1 and 10ĭisp=cpm*100+vac 'for example, cpm=60 & vac=5 yields 6005TTL does one thing, and only one thing well, it changes the flash power to keep the subject exposure roughly the same as the subject to flash distance changes. 'getvac 'read pot and convert to a value from 1-10 'getcpm 'read pot and convert to a value from 30-90Ĭpm=((getvalue(_AI,1)/83)+30)/3 'reads in pot and assigns cpm a value between 30 and 90 cycles per min '/3 for debug Setconfig(_SCRO,3) 'set the microbasic print output to the TTL port Setcommand(_RWD, 0) 'disable watchdog timerĭim cpm as integer 'cycles per minute of pump, controlled by potĭim vac as integer 'desired vacuum intensity, controlled by potĭim temp as integer 'temp holding variable Please Log in or Create an account to join the conversation. I see that some people have gotten them to work (mostly with Arduino, etc.) Is there anything special required to make them active? Special implementation requirements? In general, there is scant mention of the TTL pins anywhere in the manual or on these forums (Other than they are on pins 6&7.) I am aware that TTL is inverted from RS232. (2) TTL functionality isn't implemented on my SDC2130 (1) _SCRO config setting is not implemented on my SDC2130 or the syntax isn't correct. Despite this, all script print statements continue to flow through RS232 to the console. I have issued the config "setconfig(_SCRO,3)" from a script, as well as ^SCRO 3 from the console, in an attempt to get anything to transmit from the TTL TX pin (pin 6). I see only a steady Vcc of about 3.3V on the TTL pins. (I can, however, see clear activity on the RS232 lines). I am unable to detect any serial activity on the TTL lines with my digital oscilloscope.
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