HC-05 BT Doesnt need vcc for power
119852
NOR Gate is Working Correctly with Vcc Pin Disconnected
126221
Can this AVR MCU with 5V I2C work with this sensor with 3.3V I2C?
36923
Which method or component is best to regulate 42 to 3.3 V?
75709
What is the usage of the negative voltages on a PC motherboard?
78058
Is there any option to store AC voltage?
149659
74HC595 - Initial output voltage
91831
Using series of LM 78XX for power supply
82647
Why do some devices have 200V on the case?
67534
What is / how can I get a student-safe power supply for electronics projects?
142418
Can you split power between two voltage regulators?
131932
How to create bipolar power supplying from Powerbank 5V 3A
33777
home socket with DC voltage
143282
Variation of the BASE Current with the COLLECTOR Current in CE config?
125118
230V AC to 5V DC converter, lossless
34454
Pn junction voltage drop?
28623
Why do electrical systems have neutral, live and ground when electronic systems have only VCC and ground?
79554
Power failure during upgrade