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A lab power supply for connected devices

How much power does my connected device use? Does its sleep mode conform to the manufacturer's documentation? How long will the CR2032 battery last? If you're asking yourself these sorts of questions, here is a regulated power supply, dubbed MicroSupply, in the form of an Arduino shield, which measures very small currents. Thanks to a link with a PC application, you can see and log the power consumption of your device.
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD 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.

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

Component List

[Illustration 170464-010] [Illustration 170464-010]



Default: SMD 0805

R6,R7,R8,R9 = not fitted

R12,R13,R14 = 100Ω

R1 = 100Ω 0.1%

R11 = 220Ω 0.1%

R17,R18,R19 = 1kΩ

R15 = 3kΩ

R20,R21,R22,R23 = 10kΩ

R2,R3,R4,R5 = 10kΩ 0.1%

R16 = 12kΩ

R10 = 22kΩ 0.1%

R24 = 22kΩ



Default: SMD 0805

C13 = 10nF

C1,C2,C3,C4,C5,C6,C7,C8,C9,C10,C11,C12 = 100nF

C14,C15,C16,C17,C18 = 10µF 16V, tantalum, SMD 1411



D3 = 1N5819HW-7-F

D1,D2 = BAT54C

T1 = BC847C

LED4 = blue, 1206

LED2 = green, 1206

LED3 = yellow, 1206

LED1 = red, 1206

IC10 = LT1762EMS8-5

IC5 = LT1789CS8-1

IC6,IC7 = LT1789CS8-10

IC4 = LT1790BCS6-1.25

IC1 = LT1790ACS-2.5

IC9 = LTC2054HVCS5

IC3 = LTC2309CF

IC2 = LTC2631CTS8

IC8 = LTC6241HVCS8



K8 = socket, 7-way, 0.1" pitch, for LCD1

K2 = pinheader, 6-pin, 0.1" pitch

K1,K3 = pinheader, 8-pin, 0.1" spacing

K4 = pinheader, 10-pin, 0.1" spacing

S1,S2,S3,S4 = tactile switch, 6x6 mm

K6 = USB socket, type A, angled

K5 = 2-way PCB screw terminal block, 0.2" pitch

K7 = DC Power connector, 1.95 mm central pin

LCD1 = OLED display, 0.96 inch, SPI, 7-pin

4x bolt, M2 x 8 mm

12x nut, M2

Precision resistors 1kΩ, 100kΩ and 1MΩ, 0.1%, for testing and calibration

Printed circuit board ref. 170464-1, from the Elektor Store (www.elektor.com)

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