User CrossRoads

13 votes

Why do some PCBs have the courtyard in the silkscreen layer?

answered Oct 22, 2019 at 17:21

12 votes

Accepted

Why is the socket voltage in Mexico 127V?

answered Sep 27, 2018 at 16:43

11 votes

Why does USB only use 2 lines for RX, TX instead of multiple data lines?

answered Nov 16, 2018 at 15:52

9 votes

Why do we need a bootloader separate from our application program in microcontrollers?

answered Jul 2, 2019 at 13:25

8 votes

Accepted

Trying to increase amperage of Arduino Uno digital pin (20mA) to control a cabinet lock that is rated at 12v / 2A

answered Feb 7, 2019 at 14:29

7 votes

Why does music synthesizer built from chain of astable multivibrator circuits get "out-of-tune" after a few hours?

answered Feb 7, 2019 at 15:02

6 votes

Accepted

Are 1uF NP0/C0G capacitors different than regular 1uF capacitors?

answered Dec 23, 2019 at 14:55

5 votes

What kind of transistor turns on with 0.2 volts?

answered Apr 8, 2019 at 12:42

4 votes

2 layers pcb : ground plane at bottom layer, what to put on top?

answered Aug 19, 2019 at 13:49

4 votes

Does wire color matter in electronics?

answered Dec 3, 2018 at 17:22

4 votes

Using a transistor as a switch between RX and TX

answered Sep 25, 2018 at 17:29

4 votes

What are the differences between shift register ICs?

answered Sep 13, 2018 at 15:50

4 votes

GND plane and vias on a two layer PCB

answered Sep 14, 2018 at 18:04

4 votes

Bitwise shifting of register

answered Aug 28, 2018 at 18:09

3 votes

Accepted

Increase memory of an ATmega32

answered Aug 21, 2018 at 17:01

3 votes

9X9 RGB Led matrix, design suggestion

answered Sep 18, 2018 at 16:35

3 votes

How to rinse container used for ferric chloride etching?

answered Sep 18, 2018 at 17:27

3 votes

Cost optimization - PCB Area vs. Double-sided load

answered Nov 30, 2018 at 18:48

3 votes

RS485 termination

answered Dec 21, 2018 at 13:59

3 votes

Accepted

ATmega328P running on 3.3V using a CH340G as serial to USB interface

answered Jan 8, 2019 at 17:45

3 votes

Building AC to DC circuit that can not be run on a breadboard

answered Jan 11, 2019 at 16:16

3 votes

What is the lowest voltage that a microcontroller can successfully read on the analog pin?

answered Sep 19, 2019 at 1:16

3 votes

Multiplexer to switch between many sets of 8 channels

answered Aug 6, 2019 at 15:02

3 votes

What's a opened solder bridge signifies?

answered Jun 12, 2019 at 14:30

3 votes

How can I cover PCB burn marks to identify burns later?

answered Feb 14, 2019 at 15:50

3 votes

Desoldering/soldering 1/4" chip with eight pins

answered Jan 16, 2019 at 14:59

2 votes

Using Relay Module

answered Jan 25, 2019 at 14:14

2 votes

Accepted

Can I connect three wires using a screw terminal?

answered Feb 7, 2019 at 15:10

2 votes

How to configure NPN transistor as switch and adjust current flow?

answered Feb 7, 2019 at 18:50

2 votes

IC has different pinouts on different packages?

answered Feb 4, 2019 at 0:08

Stack Exchange Network

299 Answers

Why do some PCBs have the courtyard in the silkscreen layer?

Why is the socket voltage in Mexico 127V?

Why does USB only use 2 lines for RX, TX instead of multiple data lines?

Why do we need a bootloader separate from our application program in microcontrollers?

Trying to increase amperage of Arduino Uno digital pin (20mA) to control a cabinet lock that is rated at 12v / 2A

Why does music synthesizer built from chain of astable multivibrator circuits get "out-of-tune" after a few hours?

Are 1uF NP0/C0G capacitors different than regular 1uF capacitors?

What kind of transistor turns on with 0.2 volts?

2 layers pcb : ground plane at bottom layer, what to put on top?

Does wire color matter in electronics?

Using a transistor as a switch between RX and TX

What are the differences between shift register ICs?

GND plane and vias on a two layer PCB

Bitwise shifting of register

Increase memory of an ATmega32

9X9 RGB Led matrix, design suggestion

How to rinse container used for ferric chloride etching?

Cost optimization - PCB Area vs. Double-sided load

RS485 termination

ATmega328P running on 3.3V using a CH340G as serial to USB interface

Building AC to DC circuit that can not be run on a breadboard

What is the lowest voltage that a microcontroller can successfully read on the analog pin?

Multiplexer to switch between many sets of 8 channels

What's a opened solder bridge signifies?

How can I cover PCB burn marks to identify burns later?

Desoldering/soldering 1/4" chip with eight pins

Using Relay Module

Can I connect three wires using a screw terminal?

How to configure NPN transistor as switch and adjust current flow?

IC has different pinouts on different packages?