The Adafruit INA169 Analogue DC Current Sensor Breakout sits between a load and the positive supply terminal to measure the current flowing through the load. This is referred to as high side current measuring. Suitable for measuring currents up to 5A and with supply voltages up to 60V DC, it uses a 0.1Ω shunt resistor and an internal 10kΩ to provide a voltage output of 1V per Amp. It's up to you how you use this output, you could simply connect a multimeter and read it directly or attach a microcontroller's analogue input and broadcast it across the Internet.
Supplied as an assembled and tested current sensor board plus a strip of 0.1in. header pins and a 2-way screw terminal block for you to solder on as required. If you want to change the measurement ratio, it's possible to cut the tracks to the load resistor and add your own. Please see Figure 1, "Basic Circuit Connections" in the datasheet for a handy table of values, or the supporting text for the formula.
- Measure currents of up to 5A at 60V DC
- Output sensitivity of 1V per A as standard
- Adjustable sensitivity by replacing the load resistor
- Adafruit part no.: 1164
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