User D. Patrick

5 votes

2 answers

8k views

How many watt-hours in two AA cells?

asked Oct 25, 2018 at 23:22

4 votes

3 answers

7k views

Why drive a relay with a transistor switch?

asked Mar 9, 2015 at 1:24

4 votes

1 answer

729 views

Why did KiCad merge my pins into one open blob in the solder mask gerber?

asked Feb 25, 2019 at 16:17

3 votes

0 answers

291 views

Is a single Schottky diode adequate to support power-path in a basic USB -> LiPo charging circuit?

asked Jan 19, 2022 at 17:20

3 votes

1 answer

6k views

How does base resistance affect a transistor?

asked Mar 9, 2015 at 1:19

3 votes

1 answer

924 views

Does capacitor package size matter?

asked Jan 31, 2019 at 5:46

3 votes

1 answer

767 views

Why are these LED current limiting resistors so big?

asked Feb 3, 2019 at 22:33

3 votes

3 answers

2k views

How do I know where to put stitching vias?

asked Jan 5, 2019 at 21:14

2 votes

2 answers

396 views

What is the second resistor for in this potentiometer reference circuit?

asked Jan 23, 2019 at 4:59

2 votes

2 answers

274 views

How do I power a board multiple sources including USB without exceeding the capacitance limit on USB power?

asked Jan 26, 2022 at 21:01

2 votes

2 answers

640 views

What could cause my boost converter to output below its nominal voltage?

asked Feb 28, 2019 at 3:06

1 vote

1 answer

508 views

How can I isolate an ATTiny from an I2C slave so ICSP will work?

asked Apr 6, 2019 at 19:56

1 vote

0 answers

85 views

Can I use two AD623 instrumentation amps on one shunt to cover broader current range?

asked Nov 20, 2020 at 19:01

1 vote

2 answers

130 views

Does this circuit adequately represent the thermal considerations for a boost converter?

asked Feb 7, 2019 at 3:37

1 vote

1 answer

1k views

How do inductor specifications impact their effectiveness in a boost converter circuit?

asked Feb 10, 2019 at 16:27

1 vote

2 answers

108 views

Can I use this inductor in my boost converter circuit?

asked Jan 31, 2019 at 6:00

1 vote

2 answers

373 views

Is this a valid configuration for decoupling capacitors on an IC with two supply pins?

asked Jan 5, 2019 at 5:11

1 vote

1 answer

87 views

How do current and voltage relate to load?

asked Jan 18, 2019 at 2:22

1 vote

3 answers

2k views

What is the purpose of a resistor network?

asked Nov 26, 2018 at 15:33

1 vote

2 answers

1k views

How can I isolate voltage dividers so they aren't interfered with by other parts of the circuit?

asked Nov 12, 2018 at 0:41

1 vote

2 answers

2k views

Do I need decoupling capacitors when I'm PWMing an LED?

asked Nov 26, 2018 at 1:04

1 vote

1 answer

458 views

Do I need ESD protection on a USB port used for power only?

asked Jan 9, 2022 at 1:59

0 votes

1 answer

150 views

How do I maintain ICSP functionality?

asked Nov 26, 2018 at 2:42

0 votes

1 answer

583 views

Should I spread the pads out on the footprint of a THT LED?

asked Nov 28, 2018 at 16:46

0 votes

2 answers

914 views

Can I connect Arduino ground to the negative terminal of a battery?

asked Mar 21, 2015 at 16:07

0 votes

3 answers

593 views

Understanding power dissipation by LDO regulator as it relates to battery life

asked Oct 25, 2018 at 19:55

0 votes

1 answer

105 views

How do I determine the capacitor to use when converting current to voltage?

asked Jan 18, 2019 at 2:35

0 votes

2 answers

301 views

Why did Adafruit pick a 10K resistor for this phototransistor breakout?

asked Jan 18, 2019 at 2:55

0 votes

1 answer

754 views

Easiest (or cheapest) way to get both 5V and 3.3V on one circuit

asked Jan 29, 2019 at 16:05

0 votes

1 answer

161 views

How do you add an onboard ISP for an ATTiny85?

asked Jan 29, 2019 at 23:05

Stack Exchange Network

37 Questions

How many watt-hours in two AA cells?

Why drive a relay with a transistor switch?

Why did KiCad merge my pins into one open blob in the solder mask gerber?

Is a single Schottky diode adequate to support power-path in a basic USB -> LiPo charging circuit?

How does base resistance affect a transistor?

Does capacitor package size matter?

Why are these LED current limiting resistors so big?

How do I know where to put stitching vias?

What is the second resistor for in this potentiometer reference circuit?

How do I power a board multiple sources including USB without exceeding the capacitance limit on USB power?

What could cause my boost converter to output below its nominal voltage?

How can I isolate an ATTiny from an I2C slave so ICSP will work?

Can I use two AD623 instrumentation amps on one shunt to cover broader current range?

Does this circuit adequately represent the thermal considerations for a boost converter?

How do inductor specifications impact their effectiveness in a boost converter circuit?

Can I use this inductor in my boost converter circuit?

Is this a valid configuration for decoupling capacitors on an IC with two supply pins?

How do current and voltage relate to load?

What is the purpose of a resistor network?

How can I isolate voltage dividers so they aren't interfered with by other parts of the circuit?

Do I need decoupling capacitors when I'm PWMing an LED?

Do I need ESD protection on a USB port used for power only?

How do I maintain ICSP functionality?

Should I spread the pads out on the footprint of a THT LED?

Can I connect Arduino ground to the negative terminal of a battery?

Understanding power dissipation by LDO regulator as it relates to battery life

How do I determine the capacitor to use when converting current to voltage?

Why did Adafruit pick a 10K resistor for this phototransistor breakout?

Easiest (or cheapest) way to get both 5V and 3.3V on one circuit

How do you add an onboard ISP for an ATTiny85?