sneakthief Posted June 6, 2007 Report Share Posted June 6, 2007 I was wondering if these MOS photo relays would work with a DOUT?http://www.pollin.de/shop/detail.php?pg=NQ==&a=NzI3OTU2OTk=Datasheet: http://www.pollin.de/shop/downloads/D340272D.PDFI don't see why this shouldn't work seeing as the DOUT would be interfacing with a 3V 50mA LED inside of the photo relay. This would be a lot cheaper than buying a few dozen reed switches (0,15 euro each when ordering > 10). And the 1.5ms average on-time is pretty snappy.Any thoughts?(I moved this post from Midification because it's a more general question) Quote Link to comment Share on other sites More sharing options...
TK. Posted June 6, 2007 Report Share Posted June 6, 2007 Very good point. I've no experiences with photo MOS delays, but it looks like a 4066 w/o galvanical connection, which is good! Somebody has to try this on some real gearBtw.: according to the data sheet, the LED operating current is 1.4mA typical, and 3 mA maximum (not 50 mA) - thats even better :)Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
sneakthief Posted June 6, 2007 Author Report Share Posted June 6, 2007 TK - thanks for the correction! I don't know what the heck I was looking at when I wrote down 50mA. heheh.Anyhow, I've ordered 40 of them and will be trying them out in a couple of days (midifying a Jen SX1000).Do you think 220 Ohm resistors will be appropriate for the connection between the DOUT and this relay?cheers,michel Quote Link to comment Share on other sites More sharing options...
sneakthief Posted June 18, 2007 Author Report Share Posted June 18, 2007 ok i got them and they work great! the picture makes it look like they're surface mount but they're actually regular 8-pin DIP's - however the legs have been bent then cut off. heh.anyhow this is a great alternative to reed switches although they obviously require more space and time to solder. Quote Link to comment Share on other sites More sharing options...
TK. Posted June 18, 2007 Report Share Posted June 18, 2007 Thank you! :)So, you don't need any additional components, right? Just Pin 1 via 220 Ohm resistor the digital output of the 74HC595, Pin 2 to ground, and pin 6/4 to the keyboard. What happens with pin 5?Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
sneakthief Posted June 19, 2007 Author Report Share Posted June 19, 2007 TK: you're correct - and no extra parts are needed :)I successfully midified the keys of a Jen SX 1000. Its keyboard scanner has a matrix of 3 octaves x 12 notes. I simply connected pin 4 to the one of the three octave wires and pin 6 to one of the twelve note wires and it worked!So pin 5 need not be connected in this configuration. The response is fast too! I had some fast note-sequences playing without any noticeable lag or squishiness. Quote Link to comment Share on other sites More sharing options...
Sasha Posted June 19, 2007 Report Share Posted June 19, 2007 That`s just great! My Juno 60 say thank you, Sneakthief. ;) Quote Link to comment Share on other sites More sharing options...
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