Just wanted to say THANK YOU for designing the MAX4466 board with such robust supply noise rejection.
I’ve been working on a project for a few months now. It’s a wall-sized realtime audio spectrum display, and I’ve spent lots of money and time designing and building it. Countless hours cutting and welding aluminum, vacuforming polycarbonate lenses, routing traces in eagle cad, pulling and soldering a few hundred feet of wire, etc… It has been intense and the piece goes on display in two weeks.
Up to this point I had been programming the µc on a breadboard with normal leds, which was working fine, but the actual project needs to be bright, so it uses 49 10w leds and constant-current drivers. These are all switched via shift-registered tip122 transistors with a 12v supply, and the same supply feeds a 5v regulator on the µc board. The switching is noisy, and when I plugged in the spark fun electret breakout (part# BOB-09964) I had been prototyping with, I almost had a stroke because the output signal looked like a horrible jagged mess of ramps and periodic ringing. The project had turned into a satanic feedback matrix that was emitting a train of chaotic incomprehensible transients.
I was about to give up and cry myself to sleep, but I realized I had a MAX4466 board in my drawer, and plugged it in just to make sure I’d tried everything. The project started working flawlessly. There was no noise in the audio at all! I can’t begin to describe the feeling of relief that I felt upon plugging it in.
Anyway, I just wanted to say thanks for the engineering that went into that great little board.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Maker Business — Chip inventories rise as demand falls
Wearables — How to attach a battery to your next wearables project
Electronics — Check out this shorthand shortcut
Python for Microcontrollers — Python on Microcontrollers Newsletter: 400 CircuitPython Libraries, 3m Thanks and much more! #CircuitPython #Python @ThePSF @micropython @Raspberry_Pi
Adafruit IoT Monthly — 2022 in Recap!
Microsoft MakeCode — MakeCode Thank You!
EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey
New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — New Products 1/25/2023 Featuring Adafruit ESP32-S2 Reverse TFT Feather! (Video)
No comments yet.
Sorry, the comment form is closed at this time.