Electrolytic Capacitor ESR Tester

by Eric.
Top
Bottom

2 layer board of 2.93x1.41 inches (74.45x35.71 mm).
Shared on May 10th, 2017 03:43.

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:

  1. R1 and D1 are optional power-on indication; the board will work without them.

  2. 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.

Order board. Download. Permalink. Embed order link.

Copy this HTML into your page to embed a link to order this shared project