On Friday 28 February 2014 10:13:12 andy pugh did opine: > On 28 February 2014 02:22, Gene Heskett <[email protected]> wrote: > > Are any of you now making a postage stamp sized single opto-isolator > > kit? > > I would be tempted to just heatshrink something like this in the > middle of a cable: > http://uk.rs-online.com/web/p/optocouplers/7344962/ > > I like those as they are logic-output with pull/push capability (which > means that they can charge _and_ discharge a cap in a PWM-to-voltage > stage, though you don't need that here)
Update, ordered 4 of the sparkfun gizmos. $23 & change by USPO. It looks as if this controller has an about 30k input load, fairly resistive but with a small filter cap on the far end of the input buildout R. As for logic levels and speeds, speeds are in the 5 u-sec range, and I can arrange some 1n914's to steer the signal from the C1G to the leds in it, and make the output a totem-pole push-pull. Its 2 channel, and by seriesing the output stages, using the junction as the output to this controller, and steering the inputs so there is a led on, but only one of them at either logic level, I can get an active pullup or an active pulldown. They have some sort of an inversion setup with a pair of transistors so the logic thru it is 1=1 that I can probably remove if it means the output grounds are common. I'd be willing to bet that I can reduce the rather drastic corrections now in the "linear" module by getting rid of the pwm-analog stage in the C-41. This thing is super complex, and anything I can do to "simplicate" it is a plus in the right column for me. And I note, while I have it apart, that those icecube's I am using in the braking look like they are catching hell. Trouble there in the future for sure. I'd still like to do active braking with a regulated at 10 amps current sink as the load, but finding transistors with enough SOA without using 30 in parallel has been a lost cause. 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> NOTICE: Will pay 100 USD for an HP-4815A defective but complete probe assembly. ------------------------------------------------------------------------------ Flow-based real-time traffic analytics software. Cisco certified tool. Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer Customize your own dashboards, set traffic alerts and generate reports. Network behavioral analysis & security monitoring. All-in-one tool. http://pubads.g.doubleclick.net/gampad/clk?id=126839071&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
