Test and unloading for 1,2V Accu

Each knows the problem and many dealings wrong. Small instruments are pursued with accumulators. If these are however once empty,is exchanged the complete akkuset,although only an accumulator of the whole sentence has become weak. With a simple instrument to thBatterytest the electric voltage is tested only,but the capacity of the accumulator remains a mystery. With the following Testcircuit one can observe the voltage at burden and one recognizes immediately,in which load are the accumulators. With the switch TEST EIN/AUS can unload one the accumulator also quickly,for only completely unloaded accumulators can be loaded up to the full capacity (Memoryeffect).

The construction can on a simple point printed circuit,in the flying construction or on an industrially manufactured printed circuit are undertaken. The indication instrument can be also an old instrument,it does not have to be explained absolutely for 10mA,since them 1,2V has end of scale discontinued with the variable resistor. Is connected the accumulator,can one through operate the switch TEST EIN/AUS 1,2Ohm/5Watt the accumulator up to 1A burden. If the capacity of the accumulator is considerable to exhausted,which one can not recognize absolutely at the no-load voltage,sees one it immediately on the instrument. If the TEST - switch remains furthermore in position a,can empty one the accumulator for the next load.

Some tips for the construction:
The installation in a small casing would have be strengthened already from optic regard of advantage.The application a batteryholder simplifies the connection from the accu. For the test of accumulators in size :UM-2 or UM-1 should the big resistorl on 10Watt and perhaps on 0,56Ohm changed will to increase around the accu test current.
PS.The dimension of the resistor on 5W(10W) is finds in the emerging of temperature.(in the winter can be used the Tester also as pocket heater).
!For through the reproduction emerging major fires,burn holes in the trouser pockets or other defects take over I no responsibility!

the prototype of the accutester

Photo of the version with casing next time