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USB Battery Tester

Battery testing with a USB-IO24 cable

USB Battery Tester
Testing batteries is a fairly common task among electronics enthusiasts. Instead of using a complex stand-alone meter, you can put the intelligence of a PC to good use for this. This is not difficult, thanks to the general-purpose PC connection provided by the USB-IO24 cable presented in a previous edition of Elektor magazine. The only thing you have to add is the battery interface described here.
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor Members can exclusively download these files for free as part of their Membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service. Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Components
Download the BOM list
The BOM (Bill of Materials) is the technically exhaustive listing of parts and other hardware items used to produce the working and tested prototype of any Elektor Labs project. The BOM file contains deeper information than the Component List published for the same project in Elektor Magazine. If required the BOM gets updated directly by our lab engineers. As a reader, you can download the list here.
Want to learn more about our BOM list? Read the BOM list article for extra information.
COMPONENT LIST
Resistors
R1,R4 = 270Ohm, .25W
R2 = 8.2kOhm, .25W
R3 = 820 Ohm, .25W
R5, R6 = 1kOhm, .25W
R7 = 10kOhm, .25W
R8 = 0.33Ohm 50W*
R9 = 0.1Ohm 25W*
Capacitors
C1 = 10µF 16V, radial electrolytic, 0.1’’ pitch
Semiconductors
T1,T2 = IRLIZ44NPBF
Miscellaneous
K1 = Sub-D 25 plug, PCB mount
K2 = 6-pin (2x3) pinheader, 0.1’’ pitch*
K3 = 2-pin pinheader, 0.1’’ pitch
K4–K9 = Fast-on lug terminal 0.25’’ (6.3mm), vertical, PCB mount
PCB # 130019-1 [3]
USB-IO24 cable
* see text

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