2.1mm DC Barrel Jack to Alligator Clips

5.5mm/2.1mm DC barrel jack broken out to red (center-positive) and black alligator clips. Rated for up to 24VDC and approximately 2-3A.

Logical pinout · physical placement not verified

Red alligator clipred alligator clip / barrel centre
Centre-positive output from the 2.1 mm DC barrel jack.
Type · PowerVoltage · up to 24VDC, source-dependent
Black alligator clipblack alligator clip / barrel ring
Ring/sleeve negative return from the 2.1 mm DC barrel jack.
Type · GroundVoltage · 0V return

Pin	Position	Type	Function	Voltage
Red alligator clip	red alligator clip / barrel centre	Power	Centre-positive output from the 2.1 mm DC barrel jack.	up to 24VDC, source-dependent
Black alligator clip	black alligator clip / barrel ring	Ground	Ring/sleeve negative return from the 2.1 mm DC barrel jack.	0V return

Logical pinout · physical placement not verified

Pin details

2 connections

Red alligator clip
Centre-positive output from the 2.1 mm DC barrel jack.
PowerVoltage · up to 24VDC, source-dependent
red alligator clip / barrel centre
Black alligator clip
Ring/sleeve negative return from the 2.1 mm DC barrel jack.
GroundVoltage · 0V return
black alligator clip / barrel ring

Start wiring

3.3 V · 5 V · Module

The family now includes 9 V wall adapters at 650 mA, 1 A and 2.55 A. The voltage class matches, but current headroom, plug region, connec…

Module pins: Red alligator clip, Black alligator clip. Schematik maps them to your board in the app.

Power supplies

146 other options

Wall adapters (5V–24V), adjustable and fixed buck/boost/buck-boost converters (MT3608, LM2596-class), USB-C PD triggers (HUSB238), breadboard supplies, DIN-rail units and passive barrel-jack adapters.

View all 146

Related groups

4 groups

Batteries

9V alkaline cells, CR2032 coin cells, 3.7V LiPo packs (1000–1200mAh), 7.4V 2S LiPo, 18650 Li-ion holders (1–6 cells), AA/AAA holders in every configuration, and snap leads with barrel adapters.

Power · Batteries · 104 parts

Charging

Single-cell LiPo chargers (TP4056, MicroUSB/Type-C modules), charger/booster combos (PowerBoost 500/1000, Lipo Rider Plus 5V/2.4A), I2C fuel gauges (MAX17048, LC709203F) and Qi wireless charging coils.

Power · Chargers & fuel gauges · 47 parts

Solar

Solar panels from 1.5V 250mA flexible film to 18V 10W polysilicon, MPPT solar power managers (DFRobot 5V and 9V/12V/18V, Waveshare 6V–24V), bq25185 charger boards and LTC3588 energy-harvesting breakouts.

Power · Solar power · 28 parts

3D printing

DFRobot 1.75 mm PLA in 1 kg spools makes up the bulk of the group, in over 15 colors. Specialty options include PVA in both diameters, NinjaFlex flexible filament, Proto-Pasta conductive PLA, and wood-fill. OverLord printer spares and OverLord printers round out the hardware side.

Tools & prototyping · 3D printing · 53 parts

Pinout