Update readme

Co-authored-by: Alex L <leightonalexandra@gmail.com>
Co-authored-by: Filipe Carvalho <34546039+filcarv@users.noreply.github.com>
Co-authored-by: Artur_Silva <artur.silva@neuro.fchampalimaud.org>

Author: 4 people

README.md

@@ -1,3 +1,48 @@
+## Harp Load Cells Interface and Reader##
+
+This pair of boards can be used to acquire analog signals from load cells and output their data to a USB host. It is additionally able to emit programmable digital events.
+
+![LoadCellsInterface](./docs/assets/loadCellsInterface.png)
+
+### Key Features ###
+
+* Load cells interface
+  * Controls up to 2 load cells readers
+  * Digital outputs can be regulated at 3V or 5V
+* Load Cells Reader
+  * Up to 4 load cell sensors
+  * 1kHz sampling rate
+  * Load cells offset compensation
+
+### Connectivity ###
+
+* Load cells interface
+  * 1x BNC input signal (IN0)
+  * 1x BNC output signal (Out0)
+  * 1x screw terminal connector interface (GND, DOUT1 to DOUT8, DIN0)
+  * 2x RJ45 for digital inputs (from load cells devices)
+  * 1x stereo jack for clock sync input (CLKIN)
+  * 1x USB (for computer)
+  * 1x power barrel connector jack (12V only)
+  * 1x screw terminal connector for 5V output (GND, +5V)
+* Load Cells Reader
+  * 4x flick lock connectors (X1 to X4) with 4 analog inputs each (5V, I+, I-, 0V)
+  * 1x digital output [RJ45]
+
+## Interface ##
+
+The interface with the Harp board can be done through [Bonsai](https://bonsai-rx.org/) or a dedicated GUI (Graphical User Interface).
+
+In order to use this GUI, there are some software that needs to be installed:
+
+1 - Install the [drivers](https://bitbucket.org/fchampalimaud/downloads/downloads/UsbDriver-2.12.26.zip).
+
+2 - Install the [runtime](https://bitbucket.org/fchampalimaud/downloads/downloads/Runtime-1.0.zip).
+
+3 - Reboot the computer.
+
+4 - Install the [GUI](https://bitbucket.org/fchampalimaud/downloads/downloads/Harp%20Load%20Cells%20v1.1.0.zip).
+
 ## Licensing ##
 
 Each subdirectory will contain a license or, possibly, a set of licenses if it involves both hardware and software.