Arduino Sensor And Modules

KY-038 LM393 Sound Detection Sensor Module for Arduino detects whether the sound has exceeded a threshold value. The sound is detected via a microphone and fed into an LM393 op-amp. The sound level setpoint is adjusted via an onboard potentiometer. When the sound level exceeds the setpoint, an LED on the module is illuminated and the output is sent low.

KY040 KY-040 Rotary Encoder Sensor Module Brick Sensor is a rotary input device (as in knob) that provides an indication of how much the knob has been rotated AND what direction it is rotating in. It’s a great device for stepper and servo motor control. You could also use it to control devices like digital potentiometers.KY040 M274 360 rotary Degree encoder, is an incremental electro-mechanical device that converts the angular position or motion of a shaft or axle to digital code. The output of incremental encoders provides information about the motion of the shaft, which is typically further processed in processor/controllers into information such as speed, distance, and position.

If you need a bit of power for your small speakers, this well-made micro audio amp amplifier module will do. The LM386 Audio Amplifier Module is a basic signal amplifier with 200X Gain, designed to accept incoming audio signals and boost them while maintaining the correct sound levels and ratios. Audio Power Amplifier is a low-voltage Electronic Module with a small form factor that can read incoming signals from audio devices like radios, guitar pickups, and microphones to amplify them for audio output devices like speakers, headphones, or additional digital modules. Subwoofer Amplifier features an internal gain of 20x to keep the external parts count as low as possible, and an onboard potentiometer for manual on-the-fly volume adjustments. You can definitely use this High gain Audio Amplifier Module for other musical projects too.

LM-393 Microphone Sound Sensor Voice Detection Module for Arduino detects whether the sound has exceeded a threshold value. The sound is detected via a microphone and fed into an LM393 op-amp. The sound level setpoint is adjusted via an onboard potentiometer. When the sound level exceeds the setpoint, an LED on the module is illuminated and the output is sent low.

The MAX9814 is available in the space-saving, 14-pin TDFN package. This device is specified over the -40°C to +85°C extended temperature range. MAX9814 is a low-cost, high-quality microphone amplifier with automatic gain control (AGC) and low-noise microphone bias. The device features a low-noise preamplifier, variable gain amplifier (VGA), output amplifier, microphone-bias-voltage generator, and AGC control circuitry. The low-noise preamplifier has a fixed 12dB gain, while the VGA gain automatically adjusts from 20dB to 0dB, depending on the output voltage and the AGC threshold. The output amplifier offers selectable gains of 8dB, 18dB, and 28dB. With no compression, the cascade of the amplifiers results in an overall gain of 40dB, 50dB, or 60dB. A trilevel digital input programs the output amplifier gain. An external resistive divider controls the AGC threshold and a single capacitor programs the attack/release times. A trilevel digital input programs the ratio of attack-to-release time. The hold time of the AGC is fixed at 30ms. The low-noise microphone-bias-voltage generator can bias most electret microphones.

This is the Magnetic Door Switch Set, a small reed switch assembly specifically designed to alert you when doors, drawers, or any other aperture opens. These types of switches are primarily used in home security systems. One half of the assembly is set on a window or door frame and the other is attached to the window or door itself. When the switch set is separated from each other the contact is broken and triggers an alarm. When each magnet piece comes within 20mm of each other they complete the circuit with the internal reed switches.