Electrolytic Capacitor ESR Tester
author: Eric
2 layer board of 2.93 x 1.41 inches (74.4 x 35.7 mm)
Uploaded:
September 17, 2015
Shared:
May 10, 2017
Total Price:
$20.60
Cost: $20.60 for three.
Description: This board tests the equivalent series resistance (ESR) of electrolytic capacitors and outputs 1 volt per ohm to a multimeter. The design is tested and working.
BOM cost is ~$13 for just the components to populate the board. Click for a Digi-Key shopping cart with those parts.
For cheaper trimmer potentiometers, click to search eBay for “3296W 1M” and “3296W 5k”, sorted by price.
Notes:
R1 and D1 are optional power-on indication; the board will work without them.
M1 is not obviously marked for pin 1 location. Place part with its conjoined legs on the left, with the board oriented as shown in the OSHPark rendering above.
Download: Click here for a .ZIP archive containing the schematic, DipTrace v3.0.0.1 CAD files and RS-274X Gerber files.
Cost: $20.60 for three.
Description: This board tests the equivalent series resistance (ESR) of electrolytic capacitors and outputs 1 volt per ohm to a multimeter. The design is tested and working.
BOM cost is ~$13 for just the components to populate the board. Click for a Digi-Key shopping cart with those parts.
For cheaper trimmer potentiometers, click to search eBay for “3296W 1M” and “3296W 5k”, sorted by price.
Notes:
R1 and D1 are optional power-on indication; the board will work without them.
M1 is not obviously marked for pin 1 location. Place part with its conjoined legs on the left, with the board oriented as shown in the OSHPark rendering above.
Download: Click here for a .ZIP archive containing the schematic, DipTrace v3.0.0.1 CAD files and RS-274X Gerber files.
