> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # LED Brightness Adjuster Kit **Type:** Product page · **SKU:** SPX-21226 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia) **Page:** https://core-electronics.com.au/led-brightness-adjuster-kit.html ([markdown](https://core-electronics.com.au/led-brightness-adjuster-kit.html.md)) We've all been there; you load up your project with a bunch of LEDs, only to discover that none have the same brightnesses. Some are way too dim to see, wh... ## Pricing - **Price:** $11.10 (inc GST) — $10.09 AUD, exc GST - **Quantity discounts:** 5+ $9.79 (exc GST) · 25+ $9.58 (exc GST) · 100+ $9.18 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 24 and Aug 28. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SPX-21226:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/SPX-21226:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description We've all been there; you load up your project with a bunch of LEDs, only to discover that none have the same brightnesses. Some are way too dim to see, while others require sunglasses to not be blinded! Even Sparkfun have experienced this problem with prototypes, so they recently standardized all resistor values for each of their LEDs. In the process, Sparkfun created this board to test each of their LEDs side by side. Sparkfun realized that customers might be interested in having this board to test their own LEDs, so Sparkfun added all the features they could think of! The board is designed to slot into the power rails of a breadboard, so you can stack up to 10 boards next to each other. Each board has 5 different footprints for different sizes of LEDs (SMD and through-hole), but only one LED should be added to each board. A 10k linear potentiometer is used to adjust the LED brightness, with a 100 Ohm resistor in series to protect the LED from burning out. There are silkscreen labels around the potentiometer to indicate the approximate resistance, with a couple test points "R+" and "R-" to measure the exact resistance with a DMM. This is sold as a kit, which includes the PCB, a potentiometer, a 100 Ohm resistor, and headers for connecting into a breadboard. LEDs are **NOT** included with this kit, the idea is to test your own! However you're always welcome to pick up a few extra from our storefront if you need them. The kit does not come pre-assembled, so you'll need to break out the soldering iron. This would also be great for anyone starting to learn electronics as an introduction to soldering and Ohm's Law! **Experimental Product:** [SparkX](https://www.sparkfun.com/sparkx) products are rapidly produced to bring you the most cutting edge technology as it becomes available. These products are tested but come with no guarantees. Live technical support is not available for SparkX products. Head on over to our [forum](https://forum.sparkfun.com/viewforum.php?f=123) for support or to ask a question. ### Includes - 1x LED Brightness Adjuster PCB - 1x [10k Blue Trimpot](https://core-electronics.com.au/search/?q=9806) - 1x [100 Ohm Axial Resistor](https://core-electronics.com.au/search/?q=14493) - 2x 5-pin [Male Headers](https://core-electronics.com.au/search/?q=116) ### Documents - [Schematic](https://core-electronics.com.au/attachments/localcontent/LED_Brightness_Adjuster_68360299512.pdf) - [Eagle Files](https://core-electronics.com.au/attachments/localcontent/LED_Brightness_Adjuster_93047a90962.zip) - [Dimensions](https://core-electronics.com.au/attachments/localcontent/LED_Brightness_Adjuster_343894817e8.png) - [GitHub Hardware Repo](https://github.com/sparkfunX/LED_Brightness_Adjuster) ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/S/P/SPX-21226-1.jpg)