#lm358 — Public Fediverse posts

Analog Siren for Psychedelic Soundscapes

https://web.brid.gy/r/https://hackaday.com/2026/03/21/analog-siren-for-psychedelic-soundscapes/

@cazabon same story with #TL072 and others. Just remarked #LM358

Is it just my little bubble or is the LM358 kind of ‘meme opamp’? I love it but it is strange i suppose. #lm358 #opamp #electronics #diyelectronics

Стабилизатор напряжения с цифровым управлением, но без микроконтроллера

Привет, Хабр! Сегодня мы соберём по-настоящему секретную китайскую плату, содержащую серьёзную ошибку и пробелы в документации. Но если собирать радиоконструктор вдумчиво и поискать дополнительную информацию в Интернете, то всё получится, и даже ничего не взорвётся. В отличие от популярных в настоящее время импульсных преобразователей напряжения, этот стабилизатор линейный. То есть, он не привносит в питающуюся от него цепь переключательных помех. Если добавить регулировку тока, то получится вполне годный блок питания для любительской лаборатории. В отличие от других радиоконструкторов блоков питания, комплектуемых готовыми измерительными головками, здесь цифровой вольтметр нужно собирать самим, и с ним есть нюансы. Будет интересно!

https://habr.com/ru/companies/ruvds/articles/823688/

#ruvds_статьи #tl431 #lm358 #стабилизатор_напряжения #цифровые_микросхемы #аналоговые_микросхемы #интегральные_схемы #семисегментный_индикатор #динамическая_индикация #вольтметр #вольтметр_своими_руками

I found the culprit... It's the #TL072 that goes into phase reversal because the gate and trigger signals are -12V when low.
After swapping it with a #LM358, the output signals for trigger and gate, including the LEDs work as intended.
This took a lot of time to find out, but I've gained some knowledge now.
#PhaseReversal #OpAmps #BugFixing

### Inside A Fake #LM358 | #Hackaday

> by: Al Williams
> #January 22, #2024

https://hackaday.com/2024/01/22/inside-a-fake-lm358/

Another #circuit #soldering project done: A test board for the #LM358 #OpAmp. If the chip is okay, both #LEDs are blinking (the chip contains two OpAmps), as shown in the attached video. I found the #schematics here: https://forum.allaboutcircuits.com/threads/lm358-test-circuit.171643/post-1537463
Only I used a #perfboard instead of a printed circuit board.
I powered it using a boost converter set to 9V and a salvaged 3.7V LiPo battery.

I made a small voltage rail splitter using an #LM358 #OpAmp that I salvaged from an old motion detector.
I want to play around with #OpAmps and thought it would be nice to have a #circuit for creating a virtual ground reference with positive and negative voltages.
The boost converter is only for testing, I'll connect a 24V supply later.
Only thing I have to adjust is the inrush current.
I'll convert it to a soldered perfboard, too.
#electronics #diy #dualrail #powersupply #breadboard #KiCad

Simple Circuit Keeps Process Control Loops in Tune - Spare a moment’s pity for the process engineer, whose job it is to keep industrial... - https://hackaday.com/2023/10/19/simple-circuit-keeps-process-control-loops-in-tune/ #loopcalibrator #processcontrol #currentloop #toolhacks #arduino #4-20ma #0-10v #lm358 #loop #pwm

Op Amp Contest: This Lighthouse Sculpture Flickers in the Rhythm of Chaos - Op amps are typically used to build signal processing circuits like amplifiers, in... - https://hackaday.com/2023/06/06/op-amp-contest-this-lighthouse-sculpture-flickers-in-the-rhythm-of-chaos/ #circuitsculpture #chaostheory #chuacircuit #lighthouse #ledhacks #lm358 #art

Three potentiometers control the duty cycle for pulse width modulation of the three colour channels of an RGB LED strip (non-addressable). The PWM signal is generated by #opamps (#LM358) configured as an oscillator and 3 comparators. An NPN transistor sinks the current for each of the LED colours.
#LEDs #electronics

Pulsating PWM using two #LM358 dual #opamps configured as a fast oscillator, a slow oscillator, and a comparator whose output is the source of one LED and the sink of another LED

No microcontroller required
#electronics #OperationalAmplifiers #LEDs

Surface-Mount Light Breathes Life into Your Project - If you’ve ever seen those gadgets with the “breathing light” LEDs on them and wond... - https://hackaday.com/2022/11/11/surface-mount-light-breathes-life-into-your-project/ #breathinglight #surfacemount #hardware #ledhacks #op-amp #lm358 #led

Actuator Opens the Door to Drier Dishes - Dishwashers are great at washing dishes and even rinsing them, most of the time. Where they tend t... - https://hackaday.com/2020/11/18/actuator-opens-the-door-to-drier-dishes/ #microcontrollers #linearactuator #dishwasher #lifehacks #bluepill #lm358

The Swiss Army Knife of Bench Tools - [splat238] had a ton of spare sensors laying around that he had either bought for a separate proje... more: https://hackaday.com/2020/07/28/the-swiss-army-knife-of-bench-tools/ #multi-tool #multimeter #tachometer #toolhacks #mcp23008 #mlx90614 #mpu-6050 #encoder #ssd1306 #vl53l1x #tp4056 #lm358 #wemos #pir

A Simple Yet Feature-Packed Programmable DC Load - If you’ve got the hankering to own a lab full of high-end gear but your budget is groaning in prot... more: https://hackaday.com/2020/02/28/a-simple-yet-feature-packed-programmable-dc-load/ #senseresistor #raspberrypi #toolhacks #mcp4821 #dcload #mosfet #op-amp #lm358

Fail of the Week: The Arduino Walkie That Won’t Talkie - There’s something seriously wrong with the Arduino walkie-talkie that [GreatScott!] built.
The ide... more: https://hackaday.com/2019/07/28/fail-of-the-week-the-arduino-walkie-that-wont-talkie/ #failoftheweek #wirelesshacks #walkietalkie #distortion #wireless #arduino #lm358 #nrf24 #rf

Modeling The Classic 555 Timer On A Breadboard - Over the years, readers have often commented that microcontrollers (or more specifically, the Arduin... more: https://hackaday.com/2019/06/17/modeling-the-classic-555-timer-on-a-breadboard/ #classichacks #squarewave #555timer #74ls00 #parts #lm358 #model