On/Off DC power indicator
123900
How do I design a circuit for a bi-color led to display power?
138439
In Python, how can I detect whether the computer is on battery power?
102571
Switching DC with MOSFET: p-Channel or n-Channel; Low Side Load or High Side Load?
143835
Only charge capacitor when button pushed then turn on LED momentarily with capacitor when button released
69492
How to create automatic dual battery changeover/switching circuit for uninterruptible power?
31952
Regulated AC power supply?
30099
How can I prevent iwconfig power management from being turned on?
156077
how to switch to backup battery when power fail?
116678
How to simulate simple on/off, Single-Pole-Single-Throw switch?
53976
How to connect an LED indicator to a circuit?
50408
C# .NET: How to check if we're running on battery?
76146
Use Caps Lock LED as HDD LED (or custom) indicator
92911
Unexpected voltage with switch turned off
61107
Easiest/affordable way to monitor what's using power in your home?
129408
Why are home appliances and other devices made to operate on dc?
58100
Monitoring power consumption on Mac
74625
Measuring AC voltage from DC battery