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@@ -1,54 +1,57 @@
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-# CurrentRanger
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-Precision auto-ranging current meter (ammeter)
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-
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-## [Please see the full guide and latest updates posted here.](https://lowpowerlab.com/guide/currentranger/)
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-
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-
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-
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-## Quick Highlights
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-Here are some of the features of this instrument which sets it apart:
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-
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-* Low noise zero-offset with 3-ranges (1mV output per nA/µA/mA)
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-* Low input burden voltage, high precision & bandwidth analog outputs
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-* Increased flexibility and usability with several input and output terminal options
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-* Auto-ranging capable
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-* Use standalone with a small OLED display or with a multimeter/oscilloscope
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-* Ultra fast range switching between any ranges (even nA to mA) without any glitching/bouncing of a mechanical switch
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-* Low Pass Filter mode – very useful to capture low noise signals on oscilloscopes
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-* Unidirectional mode – most used mode in measuring DC currents ranging from [0, 3.3A]
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-* Bidirectional mode – split supply biasing allows AC currents measurement ranging from [-1.65A, 1.65A]
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-* LiPo battery powered – long life and extended measurement range
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-* Auto-power-off
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-* Full digital control for power & range switching via touch pads
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-* OLED display option to read output with usable precision
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-* Datalogging possible via Bluetooth serial module
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-* SAMD21 Cortex M0+ powered, change firmware to your needs
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-* Optional buzzer for audible feedback
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-
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-* Current ranges output:
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- - 0-3300 nA/µA/mA (Unidirectional mode)
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- - +/- 0-1650 nA/µA/mA (Bidirectional mode)
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- - Burden voltage:
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- - 17µV/mA
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- - 10µV/µA
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- - 10µV/nA
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-* Output offset voltage¹: typically <10µV, max 50µV
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-* Maximum input voltage differential (see Safety): 33mV
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-* Accuracy:
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- - +/-0.05% (µA, nA ranges)
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- - +/-0.1% (mA range)
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-* Highest resolution (nA range):
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- - 100pA (3.5digit meter)
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- - 10pA (4.5 digit meter)
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- - 1pA (5.5 digit meter)
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-* Cascaded MAX4239 amplifiers with 100x output gain
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- - Bandwidth: >300KHz (-3dB)
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-
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-
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-
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-Sample no-load mA range comparison to µCurrent GOLD:
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-
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-
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-Sample measurement of a [Moteino](https://lowpowerlab.com/guide/moteino/) waking up and transmitting a RFM69 transceiver packet:
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-
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-
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+# CurrentRanger
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+Precision auto-ranging current meter (ammeter)
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+
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+This is my fork for adding a nextion display into the oled header.
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+The variant files need to replace the orginals by lowpowerlab for the board definitions.
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+The changes is to replace the i2c setup with a serialport.
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+## [Please see the full guide and latest updates posted here.](https://lowpowerlab.com/guide/currentranger/)
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+
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+
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+
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+## Quick Highlights
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+Here are some of the features of this instrument which sets it apart:
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+
|
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+* 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:
|
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+ - 0-3300 nA/µA/mA (Unidirectional mode)
|
|
|
+ - +/- 0-1650 nA/µA/mA (Bidirectional mode)
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+ - Burden voltage:
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+ - 17µV/mA
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+ - 10µV/µA
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+ - 10µV/nA
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+* Output offset voltage¹: typically <10µV, max 50µV
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+* Maximum input voltage differential (see Safety): 33mV
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+* Accuracy:
|
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|
+ - +/-0.05% (µA, nA ranges)
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+ - +/-0.1% (mA range)
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+* Highest resolution (nA range):
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+ - 100pA (3.5digit meter)
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+ - 10pA (4.5 digit meter)
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+ - 1pA (5.5 digit meter)
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+* Cascaded MAX4239 amplifiers with 100x output gain
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+ - Bandwidth: >300KHz (-3dB)
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+
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+
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+
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+Sample no-load mA range comparison to µCurrent GOLD:
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+
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+
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+Sample measurement of a [Moteino](https://lowpowerlab.com/guide/moteino/) waking up and transmitting a RFM69 transceiver packet:
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+
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+
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Per Mårtensson