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Milliohmmeter Adapter

Uses the Precision of Your Multimeter

Milliohmmeter Adapter
Milliohmmeter Adapter
Labs Project
Based on a Labs project | June 2024 | Find it here
There are several situations where you may need to measure low resistance values, down to the milliohm range. One example is locating a short circuit on a PCB, but it’s also useful for testing electrical contacts, wires, and winding resistances. The adapter presented below allows you to do this together with the multimeter you already have.
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Products

Elektor Milliohmmeter Adapter
Elektor Milliohmmeter Adapter
€34.95
€29.95
Order now!

Component list

Component List

[Illustration 240340-003-94]

[Illustration240340-004-94]

 

Resistors (0805, 0.125 W, 5%)
R1 = 2.2 kΩ
R2, R4 = 10 kΩ
R3 = 100 kΩ
R5*, R6* = 0 Ω
R7, R14 = 0.1 Ω, 2512
R8, R15 = 1 Ω
R9, R11, R16 = 10 Ω
R10, R12 = 100 Ω
R13 = 1 kΩ
P1 = 10 kΩ trimmer TC33X

Capacitors
C1*, C2* = 100 nF, 50 V, X7R, 0805

Semiconductors
IC1 = TLVH431BIL3T, SOT-23
IC2 = MCP6401T-E/OT, SOT-23-5
T1 = STD30NF06LT4, TO-252-2

 

Miscellaneous
BAT1 = Battery holder 2 x AA
BAT2 = Battery holder 1 x AA
K1 = Screw-terminal, 2 contacts, 5.08 mm pitch
S1, S101* = Tactile switch, 12 mm
S2 = DP3T slide switch (e.g., SS-23H24)

 

* = see text

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