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20W 4 Ohm Full Range Speaker [XS-GTF1027]
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A high-power 4" (102mm) full-range speaker rated at 20W continuous with 4Ω impedance. The wide frequency response of 60Hz–24kHz delivers clear audio across the full spectrum, making it suitable for projects where you need room-filling sound. Originally designed for automotive use, this speaker w...
SparkFun Inventor's Kit V3.3 - Special Edition
The SparkFun Inventor’s Kit (SIK) is a great way to get started with programming and hardware interaction with the Arduino programming language. The SIK includes everything you need to complete 16 circuits that will teach you how to read sensors, display information on an LCD, drive motors, and m...
SparkFun Inventor's Kit (for Arduino Uno) - V3.2
The SparkFun Inventor’s Kit (SIK) is a great way to get started with programming and hardware interaction with the Arduino programming language. The SIK includes everything you need to complete 16 circuits that will teach you how to read sensors, display information on an LCD, drive motors, an...
Gravity: Offline Language Learning Voice Recognition Sensor for Arduino / Raspberry Pi / Python / ESP32 - I2C & UART
What is voice recognition? Voice recognition is a computer technology that recognizes and converts speech signals into editable text or operational commands through analysis. It allows people to interact with computers by speaking without using a mouse, keyboard, or other input devices. ...
DIY Radio kit no soldering
This is an FM Radio Amplifier Mono FM Music Player, designed as a handmade wooden assembly experimental equipment. It features a wooden casing, providing a primitive and rustic design for an FM radio. It can play music from FM radio stations, with a 3W 4ohm speaker that produces cl...
Circuit Classics: Stepped Tone Generator
This circuit gained a life of its own, jumping from the pages of the 555 Timer IC Circuits Engineer's Mini-Notebook and out into the world as the storied Atari Punk Console. Well-known for enabling the creation of sounds just like classic Atari console games from the 1980s, it provides a ...
Adafruit HalloWing M0 Express
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The Adafruit HalloWing M0 Express is a skull-shaped development board built around the ATSAMD21G18 processor. Featuring a 1.44" full-colour TFT display, a 3-axis accelerometer, a light sensor, a speaker driver, and Feather-compatible headers, it's designed for wearables, badges, cosplay props, an...
Stereo 20W Class D Audio Amplifier - MAX9744
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A compact Class D stereo amplifier breakout based on the Maxim MAX9744. It drives two channels of 4–8 Ω speakers at up to 20 W each, powered from 4.5–14 V DC. With up to 93% efficiency, it runs cool without heatsinks — ideal for portable and battery-powered audio projects. Volume can be controll...
SparkFun Inventor's Kit - v4.1.2
A note for SparkFun Inventor's Kit v4.1 users: The only change that was made from the SIK v4.1 to the SIK v4.1.2 is our new carrying case. All of the internal parts and instructional guide have remained the same! The SparkFun Inventor's Kit (SIK) is a great way to get started with programmi...
Adafruit HalloWing M4 Express
The Adafruit HalloWing M4 Express is a skull-shaped development board powered by the ATSAMD51G18 — a 120 MHz Cortex M4 processor with 512 KB Flash and 192 KB RAM. Featuring a 1.54" IPS TFT display (240×240 pixels), a 3-axis accelerometer, a light sensor, a speaker driver, four NeoPixel LEDs, and ...