From b460efddf75fd44e14055aa38d4f9816e6d41081 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?H=C3=A5kon=20L=C3=B8vdal?= Date: Thu, 1 Feb 2018 20:02:08 +0100 Subject: [PATCH] Board_003: Add readme for simmulation --- Electrical/Board_003/simulation/README.md | 11 +++++++++++ 1 file changed, 11 insertions(+) create mode 100644 Electrical/Board_003/simulation/README.md diff --git a/Electrical/Board_003/simulation/README.md b/Electrical/Board_003/simulation/README.md new file mode 100644 index 00000000..1a199dca --- /dev/null +++ b/Electrical/Board_003/simulation/README.md @@ -0,0 +1,11 @@ + +This directory contains various simulation of the M-Bus part of [MBus_USB.pdf](../doc/MBus_USB.pdf?raw=true). +The simulattions are done with [qucs-s](https://ra3xdh.github.io/) using [ngspice](http://ngspice.sourceforge.net) +as simulation backend. + +The first simulation is as close to the original as possible and gradulally changed to +remove receiving parts and using a zener diode to have a constant 12V voltage drop +regardless of the power supply. The final version works with any voltage in M-Bus range. + +![](mbus_master_004.png) +