#opamps — Public Fediverse posts

Can't believe the hiatus and suddenly an afrotechmods vid!
https://www.youtube.com/watch?v=e67WiJ6IPlQ

#OpAmps #LM741 #MCP600x #TLC081 #NE5532 #LM4562 #ElectricalEngineering #AfroTechMods

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

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

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

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