User Lobi

8 votes

2 answers

2k views

50W LED with 10W power equal to 10W LED at full power?

led

asked Jun 30, 2017 at 16:01

5 votes

4 answers

1k views

LM2596 and other DC-DC converters why oscillate if the output capacitor ESR value is too low?

asked Aug 27, 2017 at 21:14

1 vote

1 answer

479 views

Why mosfet doesn't turn off when battery voltage is low?

operational-amplifier ltspice converter

asked Jun 14, 2017 at 20:55

1 vote

3 answers

1k views

If I connect a schottky-diode to the DC converter output, why doesn't sense the voltage?

voltage current dc-dc-converter feedback

asked Sep 1, 2017 at 19:47

1 vote

3 answers

160 views

Why doesn't work this circuit? I would like to sense the temperature raising

operational-amplifier resistors

asked Sep 5, 2017 at 21:12

1 vote

1 answer

5k views

How can I add to LTSpice the MC34063 model?

ltspice

asked Jul 15, 2017 at 16:06

1 vote

1 answer

181 views

How should I modify this circuit to see exactly if the batteries fully charged or still not?

led operational-amplifier charging

asked Jul 28, 2017 at 21:06

1 vote

3 answers

453 views

How can I modify this circuit to if once the battery turned off, never turn on again or turn only when min. ~0.5V increased?

voltage operational-amplifier batteries

asked Jul 30, 2017 at 8:40

0 votes

1 answer

263 views

What is the problem with this circuit? ( MOSFET + OPAMP) Battery protection circuit (draw current from battery)

voltage operational-amplifier batteries current

asked Aug 7, 2017 at 9:49

0 votes

1 answer

193 views

How can I modify this voltmeter circuit to show 0.00V when nothing connected to the output

voltage operational-amplifier resistors

asked Aug 14, 2017 at 18:46

0 votes

3 answers

2k views

I would like to make a low-battery cut-off ciruit with a P-MOSFET. How can I modify this circuit to be good?

voltage operational-amplifier batteries

asked Aug 22, 2017 at 7:14

0 votes

1 answer

87 views

Can I use LT5400 as a single resistor? Can I connect the 4 resistor in series?

resistors serial

asked May 28, 2017 at 9:26

0 votes

1 answer

1k views

I would like to use MC34063 in step up mode, but when I change the resistor value it stopped to work

dc-dc-converter converter

asked Jun 1, 2017 at 20:12

0 votes

1 answer

1k views

I bought a MP2307 DC-DC converver from eBay. I would like to filter the output, but its has a problem

dc

asked Jun 5, 2017 at 9:02

0 votes

1 answer

84 views

How can I calculate inductance in this page? [closed]

inductor

asked Jun 12, 2017 at 18:47

0 votes

2 answers

502 views

I would like to buy DSO138 oscilloscope to measure DC converters output voltage. What is the max frequency?

oscilloscope

asked Oct 16, 2017 at 21:48

0 votes

1 answer

79 views

What is the difference between the 3 circuits? (OP-AMP)

operational-amplifier

asked Oct 22, 2017 at 11:08

0 votes

1 answer

49 views

How can I calculate the Cimon in a DC-DC converter?

dc-dc-converter

asked Dec 27, 2017 at 14:37

0 votes

2 answers

64 views

Mp2307 maximum duty cycle in the datasheet

dc-dc-converter

asked Aug 29, 2017 at 20:10

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19 Questions

50W LED with 10W power equal to 10W LED at full power?

LM2596 and other DC-DC converters why oscillate if the output capacitor ESR value is too low?

Why mosfet doesn't turn off when battery voltage is low?

If I connect a schottky-diode to the DC converter output, why doesn't sense the voltage?

Why doesn't work this circuit? I would like to sense the temperature raising

How can I add to LTSpice the MC34063 model?

How should I modify this circuit to see exactly if the batteries fully charged or still not?

How can I modify this circuit to if once the battery turned off, never turn on again or turn only when min. ~0.5V increased?

What is the problem with this circuit? ( MOSFET + OPAMP) Battery protection circuit (draw current from battery)

How can I modify this voltmeter circuit to show 0.00V when nothing connected to the output

I would like to make a low-battery cut-off ciruit with a P-MOSFET. How can I modify this circuit to be good?

Can I use LT5400 as a single resistor? Can I connect the 4 resistor in series?

I would like to use MC34063 in step up mode, but when I change the resistor value it stopped to work

I bought a MP2307 DC-DC converver from eBay. I would like to filter the output, but its has a problem

How can I calculate inductance in this page? [closed]

I would like to buy DSO138 oscilloscope to measure DC converters output voltage. What is the max frequency?

What is the difference between the 3 circuits? (OP-AMP)

How can I calculate the Cimon in a DC-DC converter?

Mp2307 maximum duty cycle in the datasheet