Mean Well Power Supply - 9V / 2.55A

9 VDC 1000mA regulated switching power adapter - UL listed

Regulated 9 V switching wall adapter, 1 A, 5.5 × 2.1 mm center-positive barrel. AC mains in, fixed 9 VDC out.

Adafruit PowerBoost 1000 Basic - 5V USB Boost @ 1000mA from 1.8V+

5 V USB boost converter that lifts a 1.8 V+ LiPo or alkaline source up to a regulated 5 V at up to 1 A. Designed to be paired with a single-cell LiPo, not used standalone.

MicroUSB Plug to 5.5/2.1mm DC Barrel Jack Adapter | Kiwi Electronics

Passive MicroUSB to 5.5 × 2.1 mm center-positive barrel cable. Does not regulate or convert voltage. Output is whatever the upstream USB port already supplies (5 V).

DC-DC Automatic Step Up-down Power Module (3~15V to 5V 600mA)

5 V buck-boost module. DFRobot lists 3-15 V input, fixed 5 V output and 600 mA max load. Use when the input can sit above or below 5 V, not as a generic wall-adapter replacement.

DC-DC Automatic Step Up-down Power Module (2.5~15V to 3.3V 600mA)

3.3 V buck-boost module. DFRobot lists 2.5-15 V input, fixed 3.3 V output and 600 mA max load. Same family as DFR0569, different output rail.

DC-DC Buck Converter 7-24V to 5V 4A

5 V buck regulator. DFRobot lists 7-24 V input and 5 V/4 A max output. It steps down only, so it is not a boost converter or PD trigger cable.

DC-DC Step Down Buck Converter (6~24V to 5V/16A)

High-current 5 V buck regulator. DFRobot lists 6-24 V input, 5 V output, 16 A max current, low ripple and protection features. Use for heavier loads after thermal and wiring review.

Buck-Boost DC/DC Converter - 8-36V to 12V/6A

12 V buck-boost converter. SparkFun lists 8-36 V input and stable 12 V output up to 6 A / 72 W. It is a converter module, not a plug-in wall supply.

Wall Adapter Power Supply - 9VDC, 650mA (Barrel Jack)

Regulated 9 V switching wall adapter with 650 mA output and 5.5 × 2.1 mm barrel connector. Lower current than the Adafruit 1 A adapter, and not a 5 V supply.

USB Type C PD to 5.5mm/2.1mm Barrel Jack Adapter - 5V

USB-C PD trigger/barrel adapter for 5 V output, up to 3 A depending on the upstream PD supply. Useful for 5 V barrel-powered devices, not 9 V or 12 V boards.

USB Type C PD to 5.5mm/2.1mm Barrel Jack Adapter - 12V

USB-C PD trigger/barrel adapter for 12 V output, up to 3 A depending on the upstream PD supply. Same connector family as the 5 V adapter, different output rail.

Adafruit bq25185 USB / DC / Solar Charger with 3.3V Buck Board

LiPo charger and power-path board with a 3.3 V buck output. It can charge from USB-C or a 5-18 V DC/solar source while feeding a 3.3 V project rail, so it is not a plain regulator or a wall adapter.

Adafruit bq25185 USB / DC / Solar Charger with 5V Boost Board

LiPo charger and power-path board with a 5 V boost output. Useful for portable 5 V projects, but it depends on a LiPo battery and charge-source design, unlike a fixed wall adapter or simple buck module.

Adafruit USB Type C Power Delivery Dummy Breakout - I2C of Fixed - HUSB238

USB-C PD sink/trigger breakout around the HUSB238. It negotiates a PD profile through jumpers or I2C and exposes power for a design, but it is not the same as a sealed barrel adapter cable.

DC-DC Instelbare Step-up & Step-down Converter

Adjustable step-up/step-down converter. Kiwi lists 3.5-28 V input and 1.25-26 V adjustable output at about 1 A rated current, so the output must be set and checked before connection.

LM2577 DC-DC Step-Up (Boost) Module

LM2577 boost module for raising a DC input to a higher adjustable output. Kiwi lists 3.5-35 V input and 5-40 V adjustable output; it is a boost converter, not a buck or buck-boost replacement.

TSR 1-2433 - 3.3V/1A switching regulator

TSR 1-2433 fixed 3.3 V / 1 A switching regulator intended as an efficient 78xx-style regulator replacement. Same package family as the TSR 1-2450, but a different output rail.

TSR 1-2450 - 5V/1A switching regulator

TSR 1-2450 fixed 5 V / 1 A switching regulator intended as an efficient 78xx-style regulator replacement. Do not swap with the 3.3 V version unless the load rail changes too.