On Friday 14 March 2014 23:53:24 Peter Homann did opine: > Hi Gene, > > Have a look at the DC-03 Digispeed that I design and sell. It converts a > PWM signal into an isolated control voltage, and has quite small form > factor. > > http://www.homanndesigns.com/store/index.php?main_page=product_info&cPat > h=1&products_id=21
3 concerns with the -03 Peter (besides the ripoff when converting AUD to USD, usually resulting in at least an $80 charge). 1. I read it that it has a builtin charge pump to make the 15 volt isolated supply from the 5 volt input, and that the 5 volt supply isn't isolated, only the 15 volt and associated circuitry. Correct? 2. In that case, how much power does it need from the 5 volt line when that 15 volt generating charge pump is running? I can get 5 volts from the C1G breakout but that is fed from a lm317 bolted to the box the drivers & motor supplies are in. A relatively massive heat sink, but gets up to about 115-120F on a warm day. If your 5 volts needs 250 mills because its also running the relay coils, that will probably mean another LM317 will need to be provided. 3. One last Q since the drawings in the pdf do not say, nor does the text. That is, does the run-stop relay effectively operate by presence or absence of the PWM signal? How much lag in that event? Thanks Peter. Basically trying to figure how best to make it a drop in for the C41, but one that works a heck of a lot better. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
