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DIY DRO Kit USB connectors
#4
Iain,
TouchDRO needs only four lines: Vcc, Ground, Data, and Clock (thus 4 input pins). USB can use four or five lines (Id line is used in some cases, but that is out of scope here), so the breakout boards come with five pins. Classic iGaging DigiMag and EZ-View don't need the Id line Absolute scales use a bastardized Mitutoyo protocol, (where the fifth line is used to signal the availability of readout and for the host to request the position) so it needs to be grounded or the scale won't send data. Shahe scales with rectangular display use pinout that is just insane, and Id line is used (you can see the pinout on their page).
If you compare pinouts of the various scales, you will see that straight "plug the breakout boards into the TouchDRO PCB" just wouldn't work, since the mapping is all over the place.
Regards
Yuriy
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Messages In This Thread
DIY DRO Kit USB connectors - by Iain - 04-29-2020, 01:22 PM
RE: DIY DRO Kit USB connectors - by ejv5f - 04-29-2020, 04:39 PM
RE: DIY DRO Kit USB connectors - by Iain - 04-29-2020, 06:27 PM
RE: DIY DRO Kit USB connectors - by Yuriy - 04-30-2020, 12:19 AM
RE: DIY DRO Kit USB connectors - by Iain - 04-30-2020, 10:34 AM

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