The mLink button pad is a 6 button keypad with a serial (I2C) interface. The buttons are arranged in a d-pad format (up, down, left, right, plus select and back buttons). They have a tactile feedback when pressed and come with large (11mm) coloured circular keycaps that also make the module ideal for panel mounting. The module can also store up to 16 key presses in its internal buffer meaning that your software does not have to constantly scan the keypad to capture keypresses.

An 8Ohm 5W (continuous) speaker measuring 102mm in diameter.


Electrical and audio characteristics:

Rated Impedance: 8 Ohm +/- 15%
Resonant frequency: 330Hz +/-20%
Output Sound Pressure.: 93+/-20%
Input power (continuous): 5W
Distortion: 5% max (at rated power, 1KHz)

This adapter board is specifically designed for the ESP32-CAM development board (HCDVBD0041). It allows the ESP32-CAM to be powered and automatically programmed from a computers USB port. It is also fully compatible with the Arduino IDE allowing sketches to be automatically uploaded just like any other Arduino development board.

The ESP32-CAM is a WIFI + Bluetooth dual-mode development board based on the ESP32 microcontroller. It can be used as a standard ESP32 development board but also includes two additional features of an SVGA camera LED flash, and TF card socket.

A low profile 8Ohm 0.5W (continuous) speak measuring 40mm in diameter.


Electrical and audio characteristics:

Mean Sound Pressure Level: 		84 +/-3dB at 800Hz, 1KHz, 1.2KHz & 1.5KHz
Free Air Resonant Frequency (Fo): 	540 +/-20Hz at 1V
Frequency range:				Fo ~ 20KHz (Deviation 10dB from average S.P.L.)
Rated Impedance: 				8 +/-15% Ohm (at 1KHz, 1V)
Continuous power: 				0.5W
Short term power: 				0.8W
Distortion: 					Less than 7% at 1KHz, 0.1W

This development board is based on the popular Expressive ESP32 module. It breaks out all the modules available pins to a convenient 0.1” pitch dual in-line format suitable for breadboarding or other formats of prototyping. It also includes an auto programming circuit (reset button must be pressed after upload to run sketch) which allows the module to be automatically programmed from a computer via its USB type C socket.