> **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 # 20W Adjustable DC-DC Buck Converter with Digital Display **Type:** Product page · **SKU:** DFR0379 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia) **Page:** https://core-electronics.com.au/20w-adjustable-dc-dc-buck-converter-with-digital-display.html ([markdown](https://core-electronics.com.au/20w-adjustable-dc-dc-buck-converter-with-digital-display.html.md)) This is a 20W adjustable DC-DC buck converter module with digital display. It is based on LM2596 3A step-down voltage regulator and supports an input of 4~40V DC... ## Pricing - **Price:** $8.55 (inc GST) — $7.77 AUD, exc GST - **Quantity discounts:** 6+ $7.38 (exc GST) · 12+ $7.07 (exc GST) ## Availability & dispatch - In stock, ships same business day if ordered before 2PM (Australia/Sydney). - We can dispatch 51 today, and up to 2 more in 8–12 days. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=DFR0379:1` (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/DFR0379:1.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 This is a 20W adjustable DC-DC [buck converter](https://en.wikipedia.org/wiki/Buck_converter) module with digital display. It is based on LM2596 3A step-down voltage regulator and supports an input of 4~40V DC with an accuracy of ± 0.05V. On a regular buck converter there is no display and you have to measure the output manually with a multimeter, which can be slow and inefficient. This buck converter has a display with the output voltage readout integrated right in to the board. You can change the output by adjusting a screw potentiometer that is also integrated on to the board. Simple! This module can be used in DC applications such as batteries, power transformers, DIY adjustable power supplies, 24V vehicle power supplies, industrial equipment, 12V to 3.3V, 12V to 5V, 24V to 5V, 24V to 12V, 36V to 24V and so on. Tapping the button switches between input and output voltage measurement. Hold the button for 2 seconds and release it to disable the display. **Note:** *The adjustment knobs are 30-turn potentiometers that control the voltage and current limits. This means you may have to turn them up to 30 turns to get from the top of the output limit range (36V) to your target voltage.* ### Features**:** - Touch the button to switch the measurement input or output voltage, and an indicator shows which voltage is being measured. - The display can be disabled if necessary. Hold the button for 2 seconds, and release the button to turn off the display (output will remain on). - With wire terminals, no soldering is necessary - The input voltage is 4.0 ~ 40V. (The input voltage must be 1.5V higher than the output voltage) - Continuously adjustable output voltage range of 1.25V ~ 37V. (The input voltage must be 1.5V higher than the output voltage) - The Maximum output current is 3A, it is recommended to use within 2.0A, higher currents will need a heatsink to dissipate heat. - The output power is 20W. For more than 15W a heatsink is recommended. - The unit offers high conversion efficiency, with an average of 88% - The unit includes reverse polarity protection, overheating protection, and short circuit protection ### Specification: - Input Voltage: 4.0 ~ 40V - Output Voltage: 1.25V ~ 37V - Output Power: 20W - Output Current: 3A - Dimensions: 65 x 39 x 16 mm (L x W x H) - Weight: 22g ### Parts List: - 20W Adjustable DC-DC Buck Converter with Digital Display x1 ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/d/f/dfr0379-2-900x600.jpg)