DC adapter
Switching, regulated wall adapter · 12 V 1 A · centre-positive 5.5 × 2.1 mm
Try it on the benchThe lab drops it on an empty bench and opens its datasheet card.
Pins
- Plug centre pin (+)
- Plug sleeve (−)
Lessons and builds that use it
- Charging a phone from 12 V with an HW-688
- I²C scanner
- 16×2 I²C LCD
- Phone charging: volts, amps and watts
- 8. Voltage regulator: a 12 V supply and a steady 5 V (build)
- 9. Comparator: a clean decision at dusk (build)
- 10. Relay: switching a real lamp (build)
- 11. PIR sensor: only when someone is there (build)
- 12. 555 timer: stay on after they pass (build)
- 13. Buzzer: an alarm mode (build)