Adafruit INA219 High Side DC Current Sensor Breakout - 26V ±3.2A Max
Adafruit INA219 High Side DC Current Sensor Breakout - 26V ±3.2A Max is backordered and will ship as soon as it is back in stock.
Delivery and Shipping
Delivery and Shipping
Delivery Options
We offer several delivery choices to fit your needs:
- FREE Delivery: $0. Enjoy Free AusPost Parcel Standard Delivery on orders over $100 in value. Exclusions may apply.
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- AusPost Parcel Standard: $9. Tracked delivery in 2-6 business days.
- AusPost Parcel Express: $13. Express tracked delivery in 1-3 business days.
- Pickup: $0. Email us to arrange a pickup from our location in Huntingdale 3166 in Melbourne at support@zaitronics.com.au. More details can be found in our contact page.
Additional Information
- Non-metro addresses in WA, NT, SA & TAS may require extra time.
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- Note: Wherever possible, we will combine orders to save on shipping and reduce packaging waste.
- Note: Orders containing backordered item will delay delivery until all items are available
Warranty & Refund Policy
Warranty & Refund Policy
Warranty & Refund Policy
- Standard Warranty: 12 months for all products. Low-cost hobby parts have a 90-day warranty unless safe handling is shown.
- Exceptions: Kits and interfaceable electronics may not be covered if damaged due to misuse.
- Returns: Contact support via your order confirmation email within 14 days of purchase. Items must be unopened and in original packaging. Proof of purchase is required.
- Defective/Damaged Items: Notify us within 30 days for a free refund or replacement. Exclusions apply.
- Return Shipping Costs: Paid by the customer unless the item is defective. Shipping costs are non-refundable.
This breakout board will solve all your power-monitoring problems. Instead of struggling with two multimeters, you can just use the handy INA219 chip on this breakout to both measure both the high side voltage and DC current draw over I2C with ±1% precision.
Please Note: As of Sept 2022, due to the severe chip shortage, we've had to update this design to use either the INA219A or INA219B and in SOT-23 or SOIC package - whatever we are able to get on the market! The A version is ±1% total max current measurement error over the entire temp range (±0.5% max at 25*C) and the B version is ±0.5% total max current measurement error over the entire temp range (±0.3% max at 25*C). Overall functionality is otherwise the same.
Most current-measuring devices such as our current panel meter are only good for low side measuring. That means that unless you want to get a battery involved, you have to stick the measurement resistor between the target ground and true ground. This can cause problems with circuits since electronics tend to not like it when the ground references change and move with varying current draw. This chip is much smarter - it can handle high side current measuring, up to +26VDC, even though it is powered with 3 or 5V. It will also report back that high side voltage, which is great for tracking battery life or solar panels.
A precision amplifier measures the voltage across the 0.1 ohm, 1% sense resistor. Since the amplifier maximum input difference is ±320mV this means it can measure up to ±3.2 Amps. With the internal 12 bit ADC, the resolution at ±3.2A range is 0.8mA. With the internal gain set at the minimum of div8, the max current is ±400mA and the resolution is 0.1mA. Advanced hackers can remove the 0.1 ohm current sense resistor and replace it with their own to change the range (say a 0.01 ohm to measure up 32 Amps with a resolution of 8mA)
We include a 6-pin header (so you can easily attach this sensor to a breadboard) as well as a 3.5mm terminal plug so you can easily attach and detach your load.
Usage is simple. Power the sensor itself with 3 to 5VDC and connect the two I2C pins up to your microcontroller. Then connect your target power supply to VIN+ and the load to ground to VIN-. We have a detailed tutorial that will do all the gain, range and math for you - just plug and go with Arduino or CircuitPython!
As if that weren't enough, we've now also added SparkFun qwiic compatible STEMMA QT connectors for the I2C bus so you don't even need to solder the I2C and power lines. Just wire up to your favorite micro using a STEMMA QT adapter cable. The Stemma QT connectors also mean the INA219 can be used with our various associated accessories. QT Cable is not included, but we have a variety in the shop.