Hello Dave, the RC protocol is very prinitive and thus very flexible. In order to make more channels possible I use a variable time slot which adds up by ten variable pulses (correctly, pulse pauses from 1 to 2 ms) which contain the channel informations plus a 10 ms sync pulse (can be reduced to 6 or 8 ms without problems). So, the length of the whole telegram varies from 20 ms (all ten channels at lower limit) to 30 ms (all channels up). Encoder and decoder use the same IC, a decimal CMOS counter. Very simple circuits for both sides. The sync pause is detected by a simple RC combination, resetting the decimal counter.
Peter Dave schrieb: >> >> > > 1-2 ms in 20ms ... I've read that before. So the min pulse width is > 1 ms and the max is 2ms.. in a 20ms time slot? > > Seems like a waste to only use up to 2ms of the 20 ms time slot... > > Dave > > ------------------------------------------------------------------------------ > RSA(R) Conference 2012 > Save $700 by Nov 18 > Register now > http://p.sf.net/sfu/rsa-sfdev2dev1 > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
