This application note assumes the use of the AVR128DB48 Curiosity Nano (EV35L43A). To set up this circuit, a breadboard or a stripboard PCB can be used with the AVR128DB48 Curiosity Nano and the following components are needed:
- AVR128DB48 Curiosity Nano Evaluation Kit
- A small 5V computer fan or similar (M1)
- 2x 1 kΩ resistor (R2, R5)
- 1x 10 kΩ resistor (R6)
- 1x 0.1 Ω current sense resistor (R1)
- 2x 100 nF capacitors (C1, C2)
- 1x N-Channel MOSFET transistor (Q1)
- 1x signal diode (D1)
Note: C1 is already present on the AVR128DB48 Curiosity Nano and as such does not need to be
added when using the kit.
These components have to be connected as shown in the schematic below:
Figure 1. Overcurrent Protection Circuit
Schematics
