electronics/USB-RS485-Adapter
5 years agoUpdated to revision 3 with corrected 74HC1G32 footprint. master
Pat Thoyts [Tue, 29 Jan 2019 21:15:25 +0000 (21:15 +0000)]
Updated to revision 3 with corrected 74HC1G32 footprint.

7 years agoReworked to fit into a Hammond box and use FT230X and single OR gate.
Pat Thoyts [Wed, 27 Sep 2017 23:15:38 +0000 (00:15 +0100)]
Reworked to fit into a Hammond box and use FT230X and single OR gate.

The Hammond box 1551G drawing for the PCB layout was done in LibreCad and
the DXF file converted to an outline in PCB.
Changed to use the new cheaper FTDI FT230XS device for USB comms and
replaced the quad OR chip with a single gate TSOP package.

Sent for manufacture.

7 years agoRS485 channel A should be pulled up and B down for fail-safe mode.
Pat Thoyts [Fri, 1 Sep 2017 00:38:53 +0000 (01:38 +0100)]
RS485 channel A should be pulled up and B down for fail-safe mode.

The previous version has this swapped and we get a spike at the end of
each packet as the lines adjust to the non-driven state.

7 years agoInclude a README file. v1
Pat Thoyts [Sat, 26 Aug 2017 19:44:43 +0000 (20:44 +0100)]
Include a README file.

Manufactured board are good except plated mounting holes under USB
connector.

7 years agoUSB to RS-485 adapter using FT232 interface device.
Pat Thoyts [Fri, 4 Aug 2017 09:49:45 +0000 (10:49 +0100)]
USB to RS-485 adapter using FT232 interface device.