itnewsbot, to books
@itnewsbot@schleuss.online avatar

Analog Engineer’s Pocket Reference Needs a Big Pocket - We always admire when companies produce useful tools or documentation that aren’t ... - https://hackaday.com/2024/02/10/analog-engineers-pocket-reference-needs-a-big-pocket/

itnewsbot, to random
@itnewsbot@schleuss.online avatar

Op-Amp Contest: Virtual Ball-in-a-Box Responds to Your Motions - With the incredible variety of projects submitted to our Op-Amp Contest, you’d alm... - https://hackaday.com/2023/06/07/op-amp-contest-virtual-ball-in-a-box-responds-to-your-motions/

itnewsbot, to art
@itnewsbot@schleuss.online avatar

Op Amp Contest: Generate Spirograph Shapes Using Only Op Amps and Math - If you’re a child of the ’80s or ’90s, chances are you’ve spent hours tracing out ... - https://hackaday.com/2023/06/05/op-amp-contest-generate-spirograph-shapes-using-only-op-amps-and-math/ #hypotrochoid #epitrochoid #spirograph #toyhacks #mcp6004 #opamps #art

bornach, to random
@bornach@fosstodon.org avatar

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

Breadboard prototyping of a 4 opamp circuit using 2 LM358 integrated circuits and a number of passive components, hooked up to an oscilloscope that displays the duty cycle of the output waveform slowly varying from 0% to 100% then back to 0% and the cycle repeats. A red LED gets brighter then dimmer, in antiphase with a green LED that goes dimmer then brighter

bornach,
@bornach@fosstodon.org avatar

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

RGB LED strip connected to a breadboard circuit consisting of three LM358 dual opamps, 3 NPN transistors, and a few resistors. Three linear potentiometers control the PWM duty cycle for each of the three colour channels: red, green, and blue.

bornach, (edited )
@bornach@fosstodon.org avatar

Using 7 dual #opamps (LM358) to generate PWM signals for driving a non-addressable RGB LED strip so that only one linear potentiometer is needed to sweep through the colours of the #rainbowFlag

Project inspired by
https://youtu.be/KMuTTQeQ4_c
in which @blitzcitydiy used a microcontroller to map a potentiometer to the range of hues

#PrideMonth #electronics #opampChallenge #LEDs

itnewsbot, to science
@itnewsbot@schleuss.online avatar

Hackaday Prize 2023: Explore the Basics of Neuroscience with this Electronic Neuron - Brains are the most complex systems in the universe, but their basic building bloc... - https://hackaday.com/2023/05/01/hackaday-prize-2023-explore-the-basics-of-neuroscience-with-this-electronic-neuron/ #artificialneuralnetwork #artificialintelligence #2023hackadayprize #thehackadayprize #neuroscience #science #neuron #opamps

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