A 10Mhz Ceramic Resonator.

A Crystal Oscillator of Quartz 4MHZ

Cristal HC-49-S 25MHz

1N5819 Schottky rectifying 40V 1A

BAT85 Schottky rectifying 30V 200mA

BAT42 Schottky rectifying 30V 100mA

1N5408 Diode Rectifier 3A 1000V

The Arduino WTV020-SD MP3 Module is a voice recording module with 1GB SD Card storage capacity. You can upload WAV and AD4 format files that conform to FAT formatting. It supports 6KHz to 32KHz, being 36KHz for AD4 files and 6-16KHz for voice sampling rate (Audio Sampling).

Zener Diode 1W 3,3V.

The Module KA2284 is a Battery, Power and Audio Level Indicator.

A small Audio Speaker that is ideal for radio and amplifier projects.

This Voice Recognition Module with Microphone for Arduino can recognize up to 15 voice instructions and be suitable for most cases involving voice control. With this module, we can control cars or other electrical devices by voice.