Electrical Engineering Questions, Problems & Solutions : TransWikia.com ~ Page 25

Use capacitor to turn on led when power is off

I have two LEDs in the circuit green LED turn on when the switch is on also capacitor is charged, Now I want to turn on the red LED by...

Asked on 11/21/2021 by FAHEEM IQBAL

1 answer

What happaned when the flyback transformer is in saturation?

I am trying to design a DC-DC flyback converter. Input voltage is 110V and output voltage is 24V. I have used NCP1252A PWM controller. Flyback transformer windings:Primary -> 24 turnsSecondary...

Asked on 11/21/2021 by Bunyamin

1 answer

Powering multiple ADCs from a single power supply in bipolar mode

I am making a PCB with 10 analog to digital converters, which each ADC needs 5v as analog supply and 10 mA as current. I found a tutorial that uses...

Asked on 11/21/2021

1 answer

How do actively driven mosfets or transistors react to floating source?

Attempting to add some lights to a car's "intelligent" lighting system. Want to make sure I understand how my n-channel mosfets will react to losing their ground, while their gates...

Asked on 11/19/2021 by Passerby

2 answer

What is wrong with this circuit simulated in Proteus?

When simulating this circuit in Proteus, I expect the LED to light up when the switch is closed, but it does...

Asked on 11/19/2021

2 answer

LiPo LED/Fiber job not working correctly after plugged in

I'm putting LEDs and fiber lighting into a ship model. There's not a ton of room, but I found I could fit two LiPo (3.7v, 2400mAH, DTP 605068) Batteries in...

Asked on 11/19/2021 by BigDamnHeroine

1 answer

How unsafe is it to use a 10 amp fuse with a trace designed for 4 amps?

Obviously I am a hobbyist and yes I am messing with mains. I do understand the danger which is why I'm asking this question. I originally wanted to make a...

Asked on 11/19/2021

1 answer

Identifying Neutral/Active when wiring a caged SMPS

Just received a switch mode power supply from china and wanted to double check everything before applying power - The screw terminals coming from the cage have Live, Neutral, Ground...

Asked on 11/19/2021

1 answer

High Vce(sat) of 2SD1048

I got a few 2SD1048's, as I wanted to add a switch to an LCD project I have, so that I could turn the LCD screen on...

Asked on 11/19/2021 by justynnuff

2 answer

Transistor Noise A Concern In Emitter Follower

I'm looking at using a high voltage BJT as an emitter follower in a high voltage tube audio application (guitar amp). Unfortunately in the range of 200V, most BJTs are...

Asked on 11/19/2021

0 answer

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