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Q&A

General Q&A about the design and function of electronic systems, electric power systems and infrastructure, their theory, and tools specific to those fields. Read these guidelines before posting.

84%
+9 −0
How to calculate pullup resistor value for pushbutton?

2 answers  ·  posted 2y ago by Olin Lathrop‭  ·  last activity over 1 year ago by Circuit fantasist‭

83%
+8 −0
Why 3V3 instead of 3V?

2 answers  ·  posted over 1 year ago by 2kind‭  ·  last activity 1y ago by Mu3‭

83%
+8 −0
83%
+8 −0
208VAC triple-phase to single-phase conversion

2 answers  ·  posted 7mo ago by cosined‭  ·  last activity 7mo ago by Andy aka‭

81%
+7 −0
Low-frequency PWM-controlled Mosfet heater circuit

2 answers  ·  posted 8mo ago by francesco‭  ·  last activity 8mo ago by Pete W‭

81%
+7 −0
How long does it take for energy to propagate in a circuit?

5 answers  ·  posted 7mo ago by Mu3‭  ·  last activity 4mo ago by coquelicot‭

80%
+6 −0
80%
+6 −0
High Speed Design - Which grounding strategy to choose?

1 answer  ·  posted over 1 year ago by 2kind‭  ·  last activity over 1 year ago by Olin Lathrop‭

80%
+6 −0
80%
+6 −0
80%
+6 −0
DAC controlled high side current source.

1 answer  ·  posted 4mo ago by DeadMouse‭  ·  last activity 2mo ago by Olin Lathrop‭

80%
+6 −0
77%
+5 −0
Rules and guidelines for drawing schematics?

1 answer  ·  posted over 1 year ago by Olin Lathrop‭  ·  edited over 1 year ago by Olin Lathrop‭

77%
+5 −0
Capacitor ESR vs. Impedance

3 answers  ·  posted 1y ago by 2kind‭  ·  last activity 1y ago by TonyStewart‭

77%
+5 −0
77%
+5 −0
How do I design a flyback converter? What are the basics I should know?

2 answers  ·  posted almost 2 years ago by Andy aka‭  ·  last activity 6mo ago by Andy aka‭

77%
+5 −0
77%
+5 −0
What is this fourth connection in NMOS device?

1 answer  ·  posted 2mo ago by NMOS lover‭  ·  last activity 1mo ago by Andy aka‭

77%
+5 −0
Design considerations for a differential pair

1 answer  ·  posted 6mo ago by DavidE‭  ·  last activity 6mo ago by Olin Lathrop‭

75%
+4 −0
75%
+4 −0
75%
+4 −0
Chokes, Beads and Inductors in Pi-filters

1 answer  ·  posted 2y ago by zeke‭  ·  last activity 2y ago by Olin Lathrop‭

75%
+4 −0
Can you call an IC pin 'N.C' if it has hidden functionality?

1 answer  ·  posted 1y ago by Kranulis‭  ·  last activity 1y ago by Olin Lathrop‭

IC
75%
+4 −0
What is this metal panel under power lines?

1 answer  ·  posted 11mo ago by Olin Lathrop‭  ·  last activity 11mo ago by DSI‭

75%
+4 −0
Why are there more N type than P type MOSFETs?

2 answers  ·  posted 5mo ago by crusadEEr‭  ·  last activity 5mo ago by Olin Lathrop‭

75%
+4 −0
What benefit has a differential amplifier when measuring a sensor signal?

1 answer  ·  posted almost 2 years ago by Andy aka‭  ·  last activity almost 2 years ago by Andy aka‭

75%
+4 −0
PCB Copper Layer Spacing & Voltage Rating

1 answer  ·  posted 6mo ago by DavidE‭  ·  edited 6mo ago by Lundin‭

75%
+4 −0
What is the difference between emitter and collector of a transistor?

2 answers  ·  posted 10mo ago by celtschk‭  ·  last activity 10mo ago by Olin Lathrop‭

75%
+4 −0
MOV vs TVS diode

2 answers  ·  posted over 1 year ago by Pete W‭  ·  last activity over 1 year ago by coquelicot‭

75%
+4 −0
75%
+4 −0
What should be considered when picking a flyback diode?

2 answers  ·  posted over 1 year ago by Lundin‭  ·  last activity over 1 year ago by Olin Lathrop‭

75%
+4 −0
ESD USB Shield Connection & Filtering

4 answers  ·  posted over 1 year ago by leroy105‭  ·  last activity 7mo ago by Pete W‭

75%
+4 −0
75%
+4 −0
Via on pad: acceptable or not?

1 answer  ·  posted 6mo ago by Mu3‭  ·  last activity 6mo ago by Olin Lathrop‭

72%
+6 −1
How to protect RF switches from ESD?

4 answers  ·  posted 5mo ago by Lundin‭  ·  last activity 4mo ago by Nick Alexeev‭

71%
+3 −0
Is a BJT 3-transistor Wilson mirror faster than a simple mirror?

1 answer  ·  posted over 1 year ago by Pete W‭  ·  last activity over 1 year ago by Olin Lathrop‭

71%
+3 −0
Why Ib=const. for BJT output characteristics Ic=f(Vce)

4 answers  ·  posted over 1 year ago by LvW‭  ·  edited over 1 year ago by LvW‭

71%
+3 −0
Using FET based followers and design rules

5 answers  ·  posted over 1 year ago by coquelicot‭  ·  last activity over 1 year ago by TonyStewart‭

71%
+3 −0
Capacitor in 2nd stage of opamp

1 answer  ·  posted 12mo ago by MissMulan‭  ·  last activity 12mo ago by Olin Lathrop‭

71%
+3 −0
71%
+3 −0
71%
+3 −0
Why are antenna PCB traces square instead of rounded?

2 answers  ·  posted 1y ago by Kranulis‭  ·  last activity 1y ago by TonyStewart‭

71%
+3 −0

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