One of my projects was to characterize an I2C temperature sensor. After writing some software, I threw together a hand-wired prototype board. I was in a hurry, so I left off that pesky decoupling capacitor. Who needs it, right?
I collected data for about a week, and none of my results matched expectations. I made numerous changes in an attempt to improve performance, but nothing worked. Finally, I decided to add the decoupling capacitor. As you might expect, this solved the issue.
This got me thinking…do we always need decoupling capacitors? What do they really do?
One way to answer the question is to show what happens when you don’t use proper decoupling.
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 — Peloton to break ground at a new manufacturing campus in Ohio
Wearables — A costume and a photo op
Electronics — Ew! Sticky!
Python for Microcontrollers — Python on Microcontrollers Newsletter: New CircuitPython Releases, RP2040 Singles and more! #Python #Adafruit #CircuitPython @micropython @ThePSF
Adafruit IoT Monthly — Toddler Clock, Predictive Weather Station, and more!
Microsoft MakeCode — Arcade Beginner Skillmap
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 – Terminal Block Breakout Module Board for Raspberry Pi Pico / Terminal Block Breakout Module for Raspberry Pi Pico – Screw Mount Version
No comments yet.
Sorry, the comment form is closed at this time.