naxthemes.blogg.se - Why can i not find any part numbers in diptrace

Dimension limit for the cheapest option is 5 cm x 5 cm and I decided to stick to this limit. I checked PCB manufacturers and decided to try Dirtypcbs.

I use USB ↔ RS-422 converter devices for my daily job heavily. Why Why did I design an isolated USB ↔ RS-422/RS-485 converter board?Īs I explained previously, I wanted to design and publish "something". So, I decided to do "something" to gain experience about open source publishing and low cost PCB production. I did some boards for my daily job previously, but I never published them in public domain. IsoUSBRs422 is my first open source hardware and also KiCad experience. See Galvanic isolation for further explanation. It may help you to prevent ground loops in large systems. Also, ground of USB port is isolated from ground of RS-422/RS-485 channel. It can be used to communicate devices with RS-422/RS-485 interface by using a USB port of PC. LED indicators: Power, Transmit, ReceiveĪs I said, basically it is an USB ↔ RS-422/RS-485 converter board.Various termination options Different termination topologies can be selected by changing some passives on the component side using solder and iron! (Sorry, no dip switches).RS-422/RS-485 line protection Yes, it should meet IEC 6, 6 and IEC 6 (IC specification, not tested by me).

USB overcurrent protection Yes, by a polyfuse.

5V from USB port is sufficient to operate the device.

Powered from USB port No external power supply is required.

baud rate divisors with values between 1 and 2 are not possible.

4 x 2.7 mm diameter mounting holes Electrically floating.

4 different modes RS-422, RS-485 4-wire, RS-485 2-wire, RS-485 2-wire w/echo suppression.

Isolated 5000 Vrms (IC specification, not tested by me).

Here is the summary of features in “catalog” style: THIS PROJECT IS PUBLISHED UNDER CC BY-NC-SA 4.0 LICENSE It should work with Windows, Linux and MacOSX (not fully tested for all operating systems by me). IsoUSBRS422 is an isolated USB RS422/RS485 converter board (~5x5 cm). See On The Web section at the bottom for details. ℹ️ isoUSBRS422v1 is on EEVblog Mailbag and Dangerous Prototypes. Photo Page on My Website (may contain additional materials)