Basic electrical test
=====================

	* Visual inspection passed
	* Short/continuity test of power rails to GND (power supplay current limiter)
	* Power‑on with bench PSU (current limit power source 50 mA; typically start < 20  mA)
	* Verify reference voltages/regulators 3,3 V +/- 0,3 V (only by problems)
	* Check power supplay
		* 12V -> max 18 mA
		* 24V -> max 9 mA
		* Overvoltage > 26V -> on power supplay current limiter activ
	* Basic comms (UART) and programming interface check (USB login on PC)
	* Record results (Form D1)
	
Equipment
---------
	* Power source 30V/1A with current limiter (setting accuracy: 0,1 V and 1 mA)
	* Programming adapter (Open Boat Projects)
	* Digital voltmeter (measuring accuracy: 1 mA)
	
Test Circuit
------------

.. image:: /pics/Test_Schematic.png
             :scale: 60%
			 
Pic.: Test circuit

.. image:: /pics/Test_Adapter.jpg
             :scale: 15%			 
Pic.: Connected programming adapter to PCB

Test conditions
---------------

    * Setting power source
        * 50 mA currrent limit
    * Digital voltmeter
        * Current 200 mA range
    * Programming adapter
        * Connected to power source
        * Connected to digiatl voltmeter
        * USB connected to PC 

.. image:: /pics/Test_Circuit_Place.jpg
             :scale: 15%		 
Pic.: Test place with test circuit

Test procedure
--------------

    **1. Set power source 12V**
    
    **2. Connect programming adapter with PCB and switch power on (refer picture and pinning)**
        * short led flash after powering
		
	.. image:: ../pics/Test_Adapter.jpg
	       :scale: 15%
		   
	    Fig.: Test adapter
        
    **3. Check no-load current (max. 20 mA)**
    
    **4. Set power source 24V**
    
    **5. Check no-load current (max. 10 mA)**
    
    **6. Set power source 30V**
    
    **7. Check no-load current (current limiter activ)**

Acceptance
----------

    * Short led flash after powering (indicator CPU is workimg)
    * No power short cut
    * All currents in the range
    * Over voltage protection okay