Adafruit Industries, Essential service and business: NYC – Executive Order 202.6 - Read more. Accepting essential orders - here's how.
0

Speed controlled RPM matching LED strip

20170804 163539 PIjU3kvy8V

Nice project + write-up from Latch Hristov up on Hackster.io.

After fumbling for some time with double-clutch heel-toe juggling, I decided I could help myself with a microcontroller. It starts with an IR sensor in the speedometer.

If you don’t know how an old speedometer works – a metal drum spins around a permanent magnet (could be more than one) spring loaded and connected to the speed needle. The induced magnetic field (current, actually – Lenz’s law) in the drum has polarity that opposes that of the magnet and subsequently, as the drum spins, it also applies a force on the magnet displacing the speed needle. The faster the drum spins, the greater the field disparity, the greater the force, and subsequently the deflection of the needle. Some energy is lost to the eddy currents, but overall it’s a clever system. Anyway – it’s the spinning drum which is moved by a cable connected to the differential of the car that is useful in this case. As it spins, the purple nail-polish stripes block (an then unblock) the reflection from and IR LED. A photodiode, then picks up this timing.

Read more.


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 16,000+ 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 7:30pm 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 — 1,000 True Fans, how creators can sustain themselves in the digital age

Wearables — Hobby knife on hand

Electronics — Diode Vf vs Voltage

Biohacking — Vitamin-C + Gelatin for Accelerated Recovery

Python for Microcontrollers — CircuitPython 5.1.0 Release Candidate 0 and more! #Python #Adafruit #CircuitPython @circuitpython @micropython @ThePSF @Adafruit

Adafruit IoT Monthly — Together we’ll make it, Upcycled IoT Display, ESP32-S2 in the Wild and More!

Microsoft MakeCode — MakeCode Powered Flowerpot!

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.