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+# CurrentRanger
+Precision auto-ranging current meter (ammeter)
+
+## [Please see the full guide and latest updates posted here.](https://lowpowerlab.com/guide/currentranger/)
+
+![CurrentRanger](https://lowpowerlab.com/wp-content/uploads/2018/09/DSC_2631-768x579.jpg)
+
+## Quick Highlights
+Here are some of the features of this instrument which sets it apart:
+
+* Low noise zero-offset with 3-ranges (1mV output per nA/µA/mA)
+* Low input burden voltage, high precision & bandwidth analog outputs
+* Increased flexibility and usability with several input and output terminal options
+* Auto-ranging capable
+* Use standalone with a small OLED display or with a multimeter/oscilloscope
+* Ultra fast range switching between any ranges (even nA to mA) without any glitching/bouncing of a mechanical switch
+* Low Pass Filter mode – very useful to capture low noise  signals on oscilloscopes
+* Unidirectional mode – most used mode in measuring DC currents ranging from [0, 3.3A]
+* Bidirectional mode – split supply biasing allows AC currents measurement ranging from [-1.65A, 1.65A]
+* LiPo battery powered – long life and extended measurement range
+* Auto-power-off
+* Full digital control for power & range switching via touch pads
+* OLED display option to read output with usable precision
+* Datalogging possible via Bluetooth serial module
+* SAMD21 Cortex M0+ powered, change firmware to your needs
+* Optional buzzer for audible feedback
+
+* Current ranges output:
+  - 0-3300 nA/µA/mA (Unidirectional mode)
+  - +/- 0-1650 nA/µA/mA (Bidirectional mode)
+  - Burden voltage:
+  - 17µV/mA
+  - 10µV/µA
+  - 10µV/nA
+* Output offset voltage¹: typically <10µV, max 50µV
+* Maximum input voltage differential (see Safety): 33mV
+* Accuracy:
+  - +/-0.05% (µA, nA ranges)
+  - +/-0.1% (mA range)
+* Highest resolution (nA range):
+  - 100pA (3.5digit meter)
+  - 10pA (4.5 digit meter)
+  - 1pA (5.5 digit meter)
+* Cascaded MAX4239 amplifiers with 100x output gain
+  - Bandwidth: >300KHz (-3dB)
+
+![CurrentRanger](https://lowpowerlab.com/wp-content/uploads/2018/09/DSC_2642.jpg)
+
+Sample no-load mA range comparison to µCurrent GOLD:
+![mA compare µCurrent](https://lowpowerlab.com/wp-content/uploads/2018/09/DS1Z_QuickPrint11_2.png)
+
+Sample measurement of a [Moteino](https://lowpowerlab.com/guide/moteino/) waking up and transmitting a  RFM69 transceiver packet:
+
+![CurrentRanger](https://lowpowerlab.com/wp-content/uploads/2018/09/CurrentRanger_LPF.gif)