Differences

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

--- ntb:connections [2019/11/18 14:33] – [LEDs and Buttons] graf
+++ ntb:connections [2026/09/25 16:03] (current) – ursgraf
@@ Line 2: / Line 2: @@
 ===== System Overview =====
-This overview shows the whole system together with all necessary modules.
+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 =====
-  - Motor -
-  - Motor +
-  - GND
-  - Udd (5V)
-  - Channel B
-  - Channel A
-{{ :delta:level_shifters_ntb.jpg?1000 |}}
+{{ :delta:ntb:level_shifters_ntb.jpg?1000 |}}
 ===== Magnet =====
@@ Line 23: / 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.