Electrical Engineering Questions, Problems & Solutions : TransWikia.com ~ Page 64

AC Power measurement ( digital sampling)

i want to measure AC power and i want to know what is the best and safest way to digital sample AC voltage and AC current? For AC voltage: We...

Asked on 11/16/2020 by d0zero

0 answer

5v analog switch for 3.3v logic ok?

I have a project where I want to interface with a keyboard matrix / scanner (this is a PCB from a consumer electronics device). There's already an implementation that uses...

Asked on 11/16/2020 by BobIsNotMyName

1 answer

Switch controlled by open/closed circuit

I am looking for a specific product: a type of switch that has an 2-pin remote connector. If these 2 pins are open-circuited, it should produce no (or low) voltage...

Asked on 11/16/2020 by Sstaty

1 answer

wien bridge input impedance

I want to know the input impedance at transistor T1's base.1/Z=1/R4+1/R+1/Rin and Rin=beta(re+RE)But how do I calculate RE...

Asked on 11/15/2020 by wadafukou

0 answer

What connector type is this?

I recently disassembled a broken Motorola G5+ and saved the battery, vibrator motor, and main circuit board for whatever I wanted to use it for. Now I'm ready to...

Asked on 11/14/2020 by Ceramicmrno0b

0 answer

Fairy lights dimming over time

I have had this cheap set of fairy lights for a few years. Powered by 3xAA batteries. Recently when they are turned on they start bright as they always...

Asked on 11/13/2020 by greenimpala

2 answer

Short circuit in Peavey Valve King VK212

This is a follow up question from:Guitar amplifier repair: burnt fuse, capacitor, what else? I continue to work on the same case. In another module I've found a...

Asked on 11/12/2020 by Piotr Tyburski

1 answer

Would my Audio LED display circuit work?

Would this circuit work? It's supposed to display the frequencies of the audio signal connected...

Asked on 11/10/2020 by Domek Romek

1 answer

Correct usage of curly braces in Spice

When are you required to use {} braces around an expression, and when can you optionally use braces? I realise that this is simulator-specific, and different simulators seem to have...

Asked on 11/08/2020 by QF0

1 answer

Why I find a real pole of a transfer function leads to an imaginary frequency and a imaginery pole of a transfer function leads to a real frequency?

Consider two cases: ...

Asked on 11/04/2020 by Phae Leung

2 answer

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