🦉🔮It’s FEATHER FRIDAY at Adafruit! Use the code ADATHX to get 20% off Feathers and 15% off items storewide! 🔮🦉
0

Dual Sensor Theremin for Sonic Pi #piday #raspberrypi @Raspberry_Pi

From rbnrpi via raspberry pi pod:

While this is a great little project, I was not very satisfied with the end result which didn’t sound very similar to a “real” theremin. The original theremin was an analogue instrument in which the audio frequency was produced by the interaction between two radio frequency oscillators at very nearly the same frequency which were controlled by the proximity of a musicians hand to a metal rod aerial. A third oscillator controlled by the proximity to a metal loop of the musicians other hand was used to control the volume. this gave a sound which was continuous when started by the proximity of a hand, whose frequency and volume could be varied smoothly. You can see an example in the picture above (from the Wikipedia article on Theremin)

The first thing I resolved to do was to use two ultrasonic sensors instead of one. I used the same circuit as the one in the raspberrypi.org article but built it twice on the same breadboard. The first circuit used pins 4 and 17 as in the original, and the second one, used pins 23 and 24 for the trigger and echo signals instead, otherwise being identical. I built the circuit on a RasPiO ProHat board which gives convenient access to all the GPIO pins, as shown in the photographs below.

Read more and see more on YouTube


3055 06Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!


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 25,000+ 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 — Pipe cleaner purposes

Electronics — Diode Test Current

Python for Microcontrollers — Python on Microcontrollers Newsletter: CircuitPython 6 released and projects galore! #Python #Adafruit #CircuitPython @micropython @ThePSF

Adafruit IoT Monthly — CO2 Cuckoo Clock, Wippersnapper, and more!

Microsoft MakeCode — Making a Smart LEGO Ferris Wheel!

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — JP’s Product Pick of the Week 11/24/20 Adafruit ST25DV16K I2C RFID EEPROM Breakout – STEMMA QT / Qwiic @adafruit @johnedgarpark #adafruit #newproductpick

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.