27mm Brass Piezo Discs with 3 contacts
These are perfect for constructing contact mics, CBG pickups, touch-sensors, drum triggers, speakers, buzzers, etc
Picture Illustration: (comparision)
Note: The 3rd lead is Feedback Electrode (Hartley Oscillator..
Electromagnetic Buzzer Size 12x9.5mm 5V to 9V 85dB 2300Hz
Good performance, general purpose buzzer used commonly in alerting / alarming circuits, rever horn and kids toys etc.. This is an external buzzer which Operates in range of voltage (3V to 9V..
ISD1820 Voice Recorder Module
Main chip: ISD1820
Size: 38.5 x 42.8mm
Operating voltage: DC 3~5V
Easy to use 10 second voice recording and playback.
High quality, natural voice restore.
Can be used as a megaphone module.
With loop play, jog pla..
PAM8403 Mini Digital Audio Amplifier Board 5V USB Power 2-Channels 3W Class D
The PAM8403 module is a miniature digital 2x3w class D power amplifier board, which can also work on USB power supply. It has good noise suppression when the input audio is via a sheilded wire..
RDA5807M RRD-102V2.0 Stereo Radio Module
The RDA5807M series is the newest generation single-chip broadcast FM stereo radio tuner with fully integrated synthesizer, IF selectivity, RDS/RBDS and MPX decoder. The tuner uses the CMOS process, support multi-interface and require ..
Speaker 8 Ohm / 0.5W - High Quality Sound
Good performance, generally used for all types of audio projects. The speaker with resistance of 8 ohm and power rating equals to 0.5W.
General warning alarm for some projects
TEA5767 Programmable Low-power FM Module Stereo Radio Module
This stereo FM radio module is made using TEA5767, a single chip electronically tuned stereo FM radio for low voltage applications. It has fully integrated Intermediate Frequency (IF) selectivity and FM demodu..
Ultra Sonic Distance Sensor Module HC-SR04
This ultrasonic sensor module can be used for measuring distance, object sensor, motion sensors etc. High sensitive module can be used with microcontroller to integrate with motion circuits to make robotic projects and other dis..