Electrical Engineering Questions, Problems & Solutions : TransWikia.com ~ Page 52

Proximity Sensor Switch Circuit

My goal is to build a proximity sensor switch circuit that can turn an LED on OR off. If I wave my hand, the light will turn on. Similarly, the...

Asked on 01/06/2021 by Paolo Linaac

1 answer

Volt-Sec-balance and Capacitor-Charge-balance

I have a problem to get to an conclusion with the VS- or CC-balance. I know that the voltage over an inductor in an switched topology behaves in an stationary...

Asked on 01/05/2021 by adaptive

1 answer

Is it better to have a higher Vgs than Vds on a MOSFET (n-channel)?

I've been studying MOSFET switching applications recently, and have been playing with the Circuit Simulator Applet here. In my diagram below, I have Vds usually set to...

Asked on 01/05/2021 by Colby Johnson

3 answer

Android Device Using Buck Converter (Voltage Regulator) instead of Li-Ion Battery

I have a project that is basically replacing my car's instrument panel with an Android device (a tablet). I managed to make everything work except for one thing: the Li-Ion...

Asked on 01/05/2021 by rafaame

3 answer

Can you help me to understand this thevenin circuit's mesh?

Why didn't we involve the 4 Ohm resistor while doing the mesh i2 ?...

Asked on 01/05/2021 by JuanDoe

1 answer

How do I control multiple 4 pin LEDs with minimum GPIO pins?

I am using 42 four pin LEDs (common cathode) for my project, and I have to control them individually. I know we can use "WS2812b" for more effective usage, but...

Asked on 01/04/2021 by Kshitij Bhatnagar

3 answer

What is the maximum routing distance between MAC to PHY recommended?

Picture to Keep the Terminology Clear I am in the plan of using ETH for inter processor communication I need few ETH lanes to...

Asked on 01/04/2021 by kakeh

2 answer

What equation do you use to find these current?

Components: 9 V battery (actual voltage is around 7 V). No resistor is used. Only red LEDs connected to a battery. There are 2, 3, and 4 LEDs connected in...

Asked on 01/04/2021 by Mac_79

3 answer

Connection of two open drain outputs to control common LEDs by PIC32MZ

I want to use this Single Cell Li-Ion Battery Charger (MCP73833).The pins STAT1 STAT2 and /PG are an open collector outputs and it will be connected to low power...

Asked on 01/03/2021 by Tomasz Dzikuć

3 answer

How efficient are LEDs?

Generally I see efficiency related to the lumens per watt, but what is the actual typical efficiency of LEDs in terms of electrical energy in to optical energy out? What...

Asked on 01/03/2021 by Dirk Bruere

3 answer

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