Differences

This shows you the differences between two versions of the page.

--- ntb:connections [2019/11/18 14:35] – [Motors and Encoders] graf
+++ ntb:connections [2026/09/25 16:03] (current) – ursgraf
@@ Line 3: / Line 3: @@
 ===== System Overview =====
 This overview shows the whole system together with all necessary modules. Please note the additional electromagnet.
-{{ :delta:system_overview_ntb.jpg?1000 |}}
+{{ :delta:ntb:system_overview_ntb.jpg?1000 |}}
 ===== Motors and Encoders =====
-{{ :delta:level_shifters_ntb.jpg?1000 |}}
+{{ :delta:ntb:level_shifters_ntb.jpg?1000 |}}
 ===== Magnet =====
@@ Line 17: / Line 17: @@
   - Magnet
-{{ :delta:magnet_print_ntb.jpg?600 |}}
+{{ :delta:ntb:magnet_print_ntb.jpg?600 |}}
+One of our robots has a magnet with high residual magnetization even after the magnet has been turned off. For this purpose The MOSFET was replaced by an H-bridge circuit. When releasing the magnet, the H-bridge drives the magnet in opposite direction for a very short time. This ensures that the magnet immediately releases its block. For driving the H-bridge a second GPIO is necessary and must be defined in the configuration file.