See the 16mHz Arduino Mega crystal on an oscilloscope. A Tektronics Active FET probe with 1.5pF loading is used to examine the oscillator of the Arduino Mega.
Adafruit has had paid day off for voting for our team for years, if you need help getting that going for your organization, let us know – we can share how and why we did this as well as the good results. Here are some resources for voting by mail, voting in person, and some NY resources for our NY based teams as well. If there are additional resources to add, please let us know – adafruit.com/vote
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.
Join 24,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord
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!
Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/
CircuitPython – The easiest way to program microcontrollers – CircuitPython.org
Maker Business — To make it through a tough business cycle, layoffs should be a last resort
Wearables — Rub’n’buff
Electronics — Multimeter Bandwidth – AC Signal
Python for Microcontrollers — Python on Microcontrollers Newsletter: CircuitPython 6 Release Candidate, new hardware & more! #Python #Adafruit #CircuitPython #ElectronicHalloween @micropython @ThePSF
Adafruit IoT Monthly — Matrix Portal, Solar Lawn Sprinkler and more!
Microsoft MakeCode — micro:bit version 2 Announced!
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 10/21/2020 Featuring Adafruit Voice Bonnet for Raspberry Pi – Two Speakers + Two Mics (Video)
Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !
3 Comments
Sorry, the comment form is closed at this time.
I remember probing my Arduino Duemilanove with my eBay probes on an HP54601B 100Mhz scope and seeing the 16Mhz signal. I must be lucky or something.
Input loading on a standard 100mhz chinese probe is 16 to 20pF.
That’s around the size of the pair of caps on the crystal and the
clock driver is pretty robust. I looked at an atmega324p with
a 20mhz crystal using a crap 10X probe and got a perfectly good
sine wave on both XTAL1/XTAL2 pins. A FET probe is overkill
for this application.
Note that there is a "low power/full swing" clock option on the
clock driver. Using the "low power" setting may not drive the
crystal hard enough to tolerate the probe load and will cause
other problems in the real (noisy) world.
This can also be done with a number of simple FET circuits, no need to go out an buy an expensive probe.