multi-voltage USB UART: Newshttps://projects.osmocom.org/https://projects.osmocom.org/favicon.ico?16647414092017-07-22T09:02:33ZOpen Source Mobile Communications
Redmine Annotated pin-out for Multivoltage UARThttps://projects.osmocom.org/news/762017-07-22T09:02:33Zlaforge
<p>In order to facilitate the simpler use of the multi-voltage USB UART, an <a class="wiki-page" href="https://projects.osmocom.org/projects/mv-uart/wiki/Wiki#Annotated-Pin-Out">Annotated Pinout</a> has been published.</p>
<p>Future PCB versions will have the signal names on the bottom layer silk screen (<a class="issue tracker-2 status-3 priority-2 priority-default closed" title="Feature: signal names on botom layer silk screen (Resolved)" href="https://projects.osmocom.org/issues/2387">#2387</a>), I'm sorry for not thinking of this for the first release already.</p> multi-voltage USB UART board releasedhttps://projects.osmocom.org/news/602016-11-25T21:15:01Zlaforge
<p>During the past 16 years I have been playing a lot with a variety of embedded devices.</p>
<p>One of the most important tasks for debugging or analyzing embedded devices is usually<br />to get access to the serial console on the UART of the device. That UART is often exposed<br />at whatever logic level the main CPU/SOC/uC is running on. For 5V and 3.3V that is easy,<br />but for ever more and more unusual voltages I always had to build a custom cable or a custom<br />level shifter.</p>
<p>In 2016, I finally couldn't resist any longer and built a multi-voltage USB UART adapter.</p>
<p>This board exposes two UARTs at a user-selectable voltage of 1.8, 2.3, 2.5, 2.8, 3.0 or 3.3V.<br />It can also use whatever other logic voltage between 1.8 and 3.3V, if it can source a reference<br />of that voltage from the target embedded board.</p>
<p><img src="https://projects.osmocom.org/attachments/download/2453/mv-uart-front.jpg" alt="" /></p>
<p>Rather than just building one for myself, I released the design as open hardware under CC-BY-SA<br />license terms. Full schematics + PCB layout design files are available.<br />For more information see <a class="wiki-page" href="https://projects.osmocom.org/projects/mv-uart/wiki">mv-uart</a>.</p>
<p>In case you don't want to build it from scratch, ready-made machine assembled boards are also made<br />available from <a href="https://shop.sysmocom.de/multi-voltage-USB-dual-UART/mv-uart" class="external">sysmocom</a></p>