Tiny Power Consumption Meter (0.1mA resolution)

prusaprinters

<h3>Tiny Power Consumption Meter</h3><ul><li>Max: 20V supply</li><li>0.1mA resolution</li><li>Max: 400mA load (1A or 2A also possible with lower resolution)</li><li>Measure frequency 70Hz</li></ul><p>Displays:</p><ul><li>mA and mW</li><li>average mA and mW since start</li><li>mAh and mWh since start</li><li>Load V</li><li>Measure frequency</li><li>Run time</li></ul><p>Ardunio code included</p><h3>Parts needed:</h3><ul><li>Arduino Nano - ATmega328P</li><li>Adafruit Feather INA219</li><li>Display 0.91 inch 128x32 i2c SSD1306</li></ul><p>Optional:</p><ul><li>1A Schottky diode</li><li>100uF 30V (connect parallell to load)</li></ul><p>.</p><h3><strong>Running the meter and the load from USB power only:</strong></h3><p>&nbsp;</p><figure class="image image-style-align-center"><img src="https://media.printables.com/media/prints/248255/rich_content/9027e224-a7d4-4819-b7f0-c938e5fa491b/image.png#%7B%22uuid%22%3A%2273ba39f3-95da-4041-87af-b1cd295d5c73%22%2C%22w%22%3A577%2C%22h%22%3A392%7D"></figure><p>&nbsp;</p><p>&nbsp;</p><h3><strong>Running the meter and the load from external power supply 7-20V:</strong></h3><p>&nbsp;</p><figure class="image image-style-align-center"><img src="https://media.printables.com/media/prints/248255/rich_content/d80785f7-ca84-45e8-a08b-50098e7c354b/image.png#%7B%22uuid%22%3A%2215c79cde-28ed-45a2-a6a2-5b41fd33525f%22%2C%22w%22%3A560%2C%22h%22%3A390%7D"></figure><p><strong>Optionally</strong> you can connect a Schottky diode from the Arduino boards USB connector 5V pin to the Arduino boards VIN pin. Then you can connect power to either the USB connector<strong>OR</strong> an external power supply to the VIN pin without rewiring anything.</p><p>&nbsp;</p><h3>&nbsp;</h3><h3>Arduino Code</h3><p>You might want to check back at some time since there might be updates to the code in main.ini. I use an Arduino Nano board that has Bluetooth (Keywish BLE-Nano) so I might add something with that, who knows...</p><p>Category: Electronics</p>