wn/homepage
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

change approach again

Browse Source
This commit is contained in:
Wolfgang Hottgenroth
2018-05-09 14:31:22 +02:00
parent 54a933c83a
commit 0686e02b75
2252 changed files with 864743 additions and 270 deletions
Download Patch File Download Diff File Expand all files Collapse all files

44
legacy/posts/2014-01-18.01/article.html Normal file
View File

@ -0,0 +1,44 @@
define(`TITLE', `Another (better) MBus-Master, Part 3')
define(`DATE', `2014-01-18')
define(`CONTENT', `
Hardware has been extended by means to measure the current on the MBus and by a over current sensing, which will be extended to over current protection soon.
<a href="http://a385e-5.de/wp-content/uploads/2014/01/Foto-e1390078985461.jpg"><img src="http://a385e-5.de/wp-content/uploads/2014/01/Foto-e1390078985461-300x225.jpg" alt="Foto" width="300" height="225" class="alignnone size-medium wp-image-356" /></a>
<a href="http://a385e-5.de/wp-content/uploads/2014/01/MBusMaster2-1.png"><img src="http://a385e-5.de/wp-content/uploads/2014/01/MBusMaster2-1-300x220.png" alt="MBusMaster2-1" width="300" height="220" class="alignnone size-medium wp-image-355" /></a>
<blockquote><strong>Well, it seems, that this way of over current signaling to the MCU does not work properly. In the first design, the input of the comparator was directly the lower end of the shunt resistor, which worked. So, the differentiator is required of current measurement, but is not usable for over current signaling. Needs some more work.</strong></blockquote>
The both blue LEDs show activity on RX and TX, the red LED signals over current.
The whole development setup:
<a href="http://a385e-5.de/wp-content/uploads/2014/01/20140118-200610.jpg"><img src="http://a385e-5.de/wp-content/uploads/2014/01/20140118-200610-300x225.jpg" alt="20140118-200610.jpg" width="300" height="225" class="alignnone size-medium wp-image-351" /></a>
Power supply:
<a href="http://a385e-5.de/wp-content/uploads/2014/01/20140118-200600.jpg"><img src="http://a385e-5.de/wp-content/uploads/2014/01/20140118-200600-300x225.jpg" alt="20140118-200600.jpg" width="300" height="225" class="alignnone size-medium wp-image-350" /></a>
Load simulation:
<a href="http://a385e-5.de/wp-content/uploads/2014/01/20140118-200526.jpg"><img src="http://a385e-5.de/wp-content/uploads/2014/01/20140118-200526-300x225.jpg" alt="20140118-200526.jpg" width="300" height="225" class="alignnone size-medium wp-image-348" /></a>
Wave form of a simple communication:
<a href="http://a385e-5.de/wp-content/uploads/2014/01/20140118-200623.jpg"><img src="http://a385e-5.de/wp-content/uploads/2014/01/20140118-200623-300x225.jpg" alt="20140118-200623.jpg" width="300" height="225" class="alignnone size-medium wp-image-352" /></a>
(Yellow is the voltage on the bus, blue is the control signal of the sample-hold-device.)
The test client:
<a href="http://a385e-5.de/wp-content/uploads/2014/01/20140118-200540.jpg"><img src="http://a385e-5.de/wp-content/uploads/2014/01/20140118-200540-300x225.jpg" alt="20140118-200540.jpg" width="300" height="225" class="alignnone size-medium wp-image-349" /></a>
And finally, some communication with the master:
<a href="http://a385e-5.de/wp-content/uploads/2014/01/Bildschirmfoto-2014-01-18-um-22.13.50.png"><img src="http://a385e-5.de/wp-content/uploads/2014/01/Bildschirmfoto-2014-01-18-um-22.13.50-300x241.png" alt="Bildschirmfoto 2014-01-18 um 22.13.50" width="300" height="241" class="alignnone size-medium wp-image-364" /></a>
')