Circuit to supply power to USB during car brownout
123502
Car bluetooth power delay- USB capacitor?
37452
Is it possible to convert a switched light into an unswitched outlet?
82738
Sense Automotive 12V Circuit from 3.3V microcontroller safely
80449
DIY 24v to 5v usb phone charger
121317
Parallel connection of DC DC Converters with different output to charge the battery
129553
5V to 3.3V Level shifting circuit
145285
High voltage LED indicator 40-1000 VDC without additional power supply
146478
USB and coin cell battery switching
78408
calculating resistance for LED strips to use as parking lamps and turn signals
6152
Automatically switching from 9V battery to DC wall adapter on insertion
69539
Powering 30m of RGB LED strips?
23382
Need single-shot 1 minute delay-off LED circuit
75147
Powering NiChrome wire from battery
108234
Driving a LED with an open drain digital output
105596
Solenoid Driving Circuit
151905
Powering circuit directly from USB while charging li-ion battery side by side
51977
Switching between 2 power supplies upon dropping below cutoff voltage efficiently