arduino › power module
generic 9V 2A Barrel-Jack Wall Adapter
Standard Arduino UNO power supply. 5.5/2.1 mm centre-positive barrel jack. Not regulated to 5V — the UNO's onboard linear regulator does the conversion (and gets hot above 1A draw).
Specifications
- voltage in v
- 100-240ac
- voltage out v
- 9.0
- current max ma
- 2000
- chemistry
- none
- protection
- overvoltage_only
Sources
- SparkFun open product catalog · ingest 2026-05-06
- Adafruit open product catalog · ingest 2026-05-06