Electrical Engineering Questions, Problems & Solutions : TransWikia.com ~ Page 63

Cause a voltage drop of about 1V

I am currently working on a battery powered project (4 x AA rechargeable batteries) with an Attiny (max vin = 5.5V), which works perfectly so far. But if I would...

Asked on 11/28/2020 by Michael Brown

3 answer

Driving Nokia TFT LCD with STM32

How do I increase the refresh rate of a Nokia LCD that I'm driving using the STM32F103 microcontroller? The LCD is 132*162 and takes a 9-bit instruction/DATA with RGB for...

Asked on 11/28/2020 by Ankit

3 answer

What's the difference between an inverter with a bubble at the input and one with a bubble at the output?

See this datasheet, page 2: the internal logic diagram for the MM74HC138. The diagram shows logic inverters with...

Asked on 11/27/2020 by Thomas O

3 answer

Help with a constant voltage led driver

Maybe the title could be better chosen. Hello, I have a 33V 0.8A constant voltage led driver (see picture below, the item no. is GL-1201C-8 if that can help) which...

Asked on 11/27/2020 by Pierre

0 answer

Single-Phase Generator

I have two pieces of single-phase fans and they are literally the same, it is ac motor and whenever I rotate it manually it produce voltage about 160-190vac. I just...

Asked on 11/26/2020 by Justine Guhit

1 answer

PCB manufactored is coated

I'm developing a printed circuit board, and considering I have some traces with 220Vac I'm worried about the clearance. After research, I conclude that these are the requirements that I...

Asked on 11/26/2020 by BrunoAraujo

1 answer

Input matrix with reed switches

I'm about to buy components for my first Arduino project: Reed contacts for my model railroad (H0 scale) to detect track usage. I don't want to use special shields, but...

Asked on 11/26/2020 by iGEL

1 answer

How to receive a startup hex string during a debug session?

This is my setup: I have a 'smart display' connected to the serial interface of a PCB with a PIC microcontroller. The PIC powers the smart display.This smart display...

Asked on 11/26/2020 by markhollis

0 answer

Li-ion charge / discharge circuit with ESP32 and MOSFET

Here is what I’d like to do: Wire a circuit that can either charge or discharge a single li-ion cell (3.0 to 4.2 V) or just do nothing at all....

Asked on 11/23/2020 by Blots

0 answer

LTspice UVLO excercise

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Asked on 11/22/2020 by Paumdrdo

2 answer

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