This is our universal LCD display battery tester
we have sold hundreds on Ebay with 100% positive feedback
and now this great product is available direct from electrocave.


Check out the You Tube demo video of the battery tester
just click on the photo to see the demo


Cost is $12.00 with regular postage for $7   Total $19.00          Order ref:      Battery Tester 

Order 2 and save on postage                               Total $ 31.00 (save $7.00)             





Very handy item for every home or workshop
can test 12 or more types of single use cells and batteries
the LCD display uses 18 columns to show Poor-Fair-Good



The tester runs on a single AAA cell (not included) we recommended an alkaline cell be used.

Test:      AAA, AA, C, D, 9Volt, CR123A, CR2, CR-V3, 2CR5, CR-P2,     N type (LR1) 1.5 Volt Alkaline
              CR2025 and CR2032 3 Volt Lithium Coin type    and 1.5 Volt coin cells like LR44 or A76

Unit is supplied in a retail blister pack and is RoHS compliant.

Please note that this unit can test rechargeable NiCad & NiMH 1.2 Volt cells but is not recommended as the voltage of such cells is not a good indicator of the remaining capacity of the cell.

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Components                             (How to order)





7805 Voltage Regulator          Pac of 5 for             $2.30       ref:  7805

L7805CV     ST Brand    TO220 Package  
+5 Volts DC output at up to 1 Amp (when used with appropriate heatsink)
Built in thermal overload and short circuit protection








7812 Voltage Regulator          Pac of 5 for             $2.30        ref:  7812

L7812CV     ST Brand    TO220 Package
+12 Volts DC output at up to 1 Amp (when used with appropriate heatsink)
Built in thermal overload and short circuit protection






LM317T + Adjustable Voltage Regulator
                                               Pac of 5 for             $3.00        ref:  317T
    
ST Brand    TO220 Package
+1.25 to 37 Volts output at up to 1.5 Amps (when used with appropriate heatsink)
Built in thermal overload and short circuit protection








78L05 Voltage Regulator
                                               Pac of 5 for             $1.50        ref:  78L05

+5 Volts DC output at up to 100mA                              
WS brand  TO92 Package
Internal thermal overload protection and short circuit current limit
Minimum input voltage is 7 Volts
Maximum input voltage is 35 Volts







KBP206 Inline Bridge Rectifier
                                               Pac of 2 for             $2.50        ref:  bridge     
2 Amps 600 Volts  lead pitch 4mm
Mounts vertically on PCB but can also be horizontal by bending the leads








MKT Polyester Capacitors 0.1uF (100nF)
                                               Pac of 25 for           $2.50        ref:  cap

Miniature polyester  5mm lead pitch
size 7.5mm wide x 2.5mm deep x 6.5mm high
Rated Voltage 100VCD working    40VAC 50/60 Hz
great for use with our voltage regulators or as decoupling capacitors across the supply pins of any IC



  DS18B20   One wire temperature sensor 
                                                                          $5.50 each    ref:  temp
                                                                                      
  Dallas Brand   TO92 Package
  Power supply 3.0V to 5.5V     
  Temperature range -55C to 125C 
  see useful links page for the datasheet
  Use this sensor with any Micro Controller
  I use it with the Picaxe08M, together they make a great low cost temp sensor
                                                   and control.
 





         TSOP34138   Infra red receiver chip 38KHz
                                                                                                 
      $3.50 each   ref :  infra 
                                                                                
 

          Operates from 2.4V to 5.5V
        This receiver can be in circuits that show the TSOP4838

          Great for use with the Picaxe and other microcontrollers
   
          Check the Projects page for more info  on the TSOP34138






IRF540N   Hexfet
                                                         $2.00 each                    ref:  mosfet

N-Channel Power Mosfet
International Rectifier brand      TO220 Package
100 Volts 28 Amps         Built in Protection diode

see Hexfet info








TIP122   NPN Darlington power transistor
                                                          $1.00 each                    ref:  tip122
ST Brand    TO220 Package
100 Volts   5 Amps  65 Watts









 
MAX7219   Serially Interfaced 8 digit LED display driver
                                                         
$5.50 each                    ref:  7219
MAXIM Brand   24 pin Narrow Dip Package
4 wire serial interface
330 mA supply current
4V to 5.5 V supply voltage
Drives Common Cathode LED Displays       see
useful links page for the datasheet

As used in the JRHackett, Picaxe serial 4-digit 7-segment led board