Questions tagged [circuit-design]

Question 1

Are the below circuits equivalent? I am powering an ntc temp sensor (acting as the bottom leg of resistor divider) with the tip leg being R568.

Question 2

I am using BQ24075 in my design. For configuring this IC, I need to add many pull-up and pull down resistors. I am confused about their power rating. Let us take the TMR (Timer Programming Input) pin, ...

Question 3

I'm building a formicarium to have below my monitor. With a Pi pico 2 W as controller, powered by a USB3 port on the monitor. I'm a software developer, but new to electronics. The schematic below is ...

Question 4

I just want to know why an RC parallel circuit is placed in a DDR reset cicuit

Question 5

I'm working on a circuit for audio output from a Teensy 4.1 using as PCM5100 I2S DAC and a TPA6111 amp. I'm wondering if the circuit, specifically the headphone out (circuitry around U23) looks viable....

Question 6

My project requires the use of a NE555, which turns on and starts operating when a 3-position switch is either up or down (not in neutral). To do this, I am using an OR-gate (no problems here) and a ...

Question 7

I am designing a high-side/low-side MOSFET drive using the IR2101. My setup has three different supply domains: Arduino: Provides HIN and LIN signals (5V logic) Referenced to GND IR2101 Gate Driver: ...

Question 8

I am currently working on creating a circuit that differentiates an incoming signal and outputs the result. I am using the circuit shown below for use as a low-noise counterpart with the same values ...

Question 9

I want to make a voltage regulator that can achieve 1.25-30V using LM317T along with a potentiometer. I'm researching it but can't find something related to using 24-0-24 being a 30V DC output. I need ...

Question 10

How do I design a wideband (>100 MHz) sweep frequency generator in UHF frequency range? I'm working on PLL frequency synthesizer incorporating a VCO, programmable divider, PFD and loop filter. I've ...

Question 11

I am trying to simulate a 5th-order passive RC low-pass filter in LTspice. My requirements: Cutoff frequency: 500 kHz Input frequency range: 30 kHz – 500 kHz Signal amplitude: 1.5 V p-p Only R and C ...

Question 12

I have a few questions about MIL-STD-1275 ("Characteristics of 28 Volt DC Input Power to Utilization Equipment in Military Vehicles"). Wouldn’t the combination of a TVS diode at the input ...

Question 13

I’m working on a circuit board for amber strobe units to be used in a car. Each board will feature eight individually addressable LEDs, controlled by an ATtiny microcontroller. In certain ...

Question 14

I'm thinking thorough how I can build a pretty low end logger to read voltage and amperage as part of electrical troubleshooting on some CNC machines. I've managed to knock together a amperage logger ...

Question 15

I have made alot of progress updates on my flight computer since I last made a post. I have a few questions now after completing my most recent version of the board, but first I will share with you ...

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Questions tagged [circuit-design]

Are these analog input circuits equivalent?

Li-Ion Battery Charger and Power-Path Management IC Pull down resistor power rating how to decide

How to achieve constant LED current when switching another load with transistors

DDR reset LPDDR4

Headphone out circuit design

PNP BJT transistor for switching and sourcing to IC

Do I need isolation between Arduino, IR2101, and a 24V MOSFET stage?

Op-amp signal differentiator producing an incorrect output

Can this produce the said DC output of 33V?

Sweep Generator Design [duplicate]

How to design a 5th-order passive RC low-pass filter (500 kHz cutoff) in LTspice?

MIL-STD-1275 Protection Method

PCB check: individually addressable LED strobe

Are flyback transformers for voltage step down on a datalogger viable? Am I missing something?

4-layer PCB design review (revised board v1.0.4)

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