USB to 2.1mm DC Booster Cable - 9V
USB-A cable with integrated boost converter that steps up USB 5V to 9VDC on a center-positive 2.1mm barrel jack. Useful for powering 9V devices from a USB port or power bank.
USB-A cable with integrated boost converter that steps up USB 5V to 9VDC on a center-positive 2.1mm barrel jack. Useful for powering 9V devices from a USB port or power bank.
USB plug input; Adafruit states the booster cable is powered from a USB port or USB battery pack and measurements use a steady 5V input supply.
2.1mm centre-positive DC barrel output for powering 9V devices; Adafruit states the cable powers centre-positive 2.1mm DC barrel jack devices.
Return/ground for the 2.1mm DC barrel output, paired with the centre-positive barrel plug.
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| USB 5V input | power | USB plug input; Adafruit states the booster cable is powered from a USB port or USB battery pack and measurements use a steady 5V input supply. | 5V input | |
| DC barrel centre pin | centre contact | power | 2.1mm centre-positive DC barrel output for powering 9V devices; Adafruit states the cable powers centre-positive 2.1mm DC barrel jack devices. | 9V output, rated 500mA by Adafruit |
| DC barrel sleeve | outer sleeve | ground | Return/ground for the 2.1mm DC barrel output, paired with the centre-positive barrel plug. | 0V return |
3.3 V · 5 V
Adafruit lists its single-cell LiPo and Li-ion packs as 3.7 V nominal, with output reaching 4.2 V when fully charged.
Module pins: USB 5V input, DC barrel centre pin, DC barrel sleeve. Schematik maps them to your board in the app.
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.
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