Electrical Engineering Questions, Problems & Solutions : TransWikia.com ~ Page 8

Z(out) for small signal analysis with BJT for unbypassed emitter and r0 in place

from this BJT small signal I try to solve Z(out) but I find RC || (ro + RE) because Z(out)...

Asked on 12/24/2021 by user7058377

2 answer

Tuning of a PID loop for heater element

I built a controller for a soldering iron (JBC C245/C210 specifically), which can supply up to 60W of power to the iron. I have a temperature control loop that runs...

Asked on 12/24/2021 by elagil

1 answer

Problems getting correct readings from ACS71020

Me and my team are developing an LED light controller for street lighting applications. We are trying to measure current draw, voltage and power consumption using Allegro's ACS71020 but the...

Asked on 12/24/2021 by FelipeMB

3 answer

Proper use of the ENC28J60 Ethernet controller

I am using the Microchip ENC28J60 Ethernet Controller in a microcontroller design. The datasheet contains the following reference circuit: ...

Asked on 12/24/2021 by SukkoPera

1 answer

Why is this circuit using a branched 5V wire?

There is an article for using MQ-135's 5V analogue output with a Raspberry Pi. The picture below is from the article. I only added the [1] mark...

Asked on 12/24/2021

1 answer

Current adder or voltage adder

Is this a current adder or a voltage adder? I just designed it....

Asked on 12/24/2021

3 answer

DIY Power Bank without auto shutoff

I own a small data logger for recording accelerations. The data logger is a Slam Stick X with integrated 250mAh rechargeable battery. My problem is that the capacity of this...

Asked on 12/24/2021 by jonnes

0 answer

how to reproduce a matching network of a vendor

I'm trying to create a board using the BGT24MTR chip from infinion. I noticed that they said that there is a Tx/Txx impedance. ...

Asked on 12/22/2021 by Legen Diary

3 answer

High Vds across MOSFET in saturation mode in Flyback converter during simulation

While simulating a flyback converter, I find that even in saturation mode the MOSFET, in spite of having Rds(on) around 0.74 ohms and the Ids = 5.75mA, is dropping almost...

Asked on 12/22/2021

2 answer

Using LM2596 step down with LiPo

i'm doing a project with esp32 (3.3v), dht11(3v-5v), soil sensor (3.3v-5v the cheapest Chinese), nrf24l01 (2.6 - 3.6v). I'm using lifepo4 right now (3.32v) but when the battery drop about...

Asked on 12/22/2021 by Quang Minh Lê

2 answer

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