2018-05-08 17:25:41 +02:00
define(`TITLE', `Another (better) MBus-Master, Part 2')
define(`DATE', `2014-01-15')
define(`CONTENT', `
2018-05-02 16:30:12 +02:00
The new MBus-Master can now handle 250mA (supplying clients and TX path) and it is reliably possible to identify a 10mA swing on top of it (RX path) and convert it into a logic signal.
< a href = "http://a385e-5.de/wp-content/uploads/2014/01/Foto-2-e1389822292462.jpg" > < img src = "http://a385e-5.de/wp-content/uploads/2014/01/Foto-2-e1389822292462-300x225.jpg" alt = "Foto 2" width = "300" height = "225" class = "alignnone size-medium wp-image-336" / > < / a >
Switching the TX-path with 1kHz, 80% duty cycle:
< a href = "http://a385e-5.de/wp-content/uploads/2014/01/Foto-1-e1389822333254.jpg" > < img src = "http://a385e-5.de/wp-content/uploads/2014/01/Foto-1-e1389822333254-300x225.jpg" alt = "Foto 1" width = "300" height = "225" class = "alignnone size-medium wp-image-335" / > < / a >
Loading the TX-path with about 250mA (the current sink specifically built - see < a href = "http://a385e-5.de/?p=264" title = "Arduino operated Current Sink" target = "_blank" > here< / a > - for this project is here in operation):
< a href = "http://a385e-5.de/wp-content/uploads/2014/01/Foto-3-e1389822313359.jpg" > < img src = "http://a385e-5.de/wp-content/uploads/2014/01/Foto-3-e1389822313359-300x225.jpg" alt = "Foto 3" width = "300" height = "225" class = "alignnone size-medium wp-image-334" / > < / a >
Finally, here are the most recent schematics of this new MBus-Master:
< a href = "http://a385e-5.de/wp-content/uploads/2014/01/MBusMaster2.pdf" > < img src = "http://a385e-5.de/wp-content/uploads/2014/01/MBusMaster2-300x170.png" alt = "MBusMaster2" width = "300" height = "170" class = "alignnone size-medium wp-image-343" / > < / a >
(The TX-test and the test for recognition of the 10mA swing have been done without the MCU at the moment.)
2018-05-08 17:25:41 +02:00
')
