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built-in CR2025 / 3 V battery
Bluetooth motherboard 1 blocks
Stepper motor can be widely used for a 3D printer
1xHM Digital TDS-3 Handheld TDS Meter
compatible with different power supplies (24V recommended)
Ky-038 Lm393 Sound Detection Module Touch Switch Module built-in CR2025 / 3 VLM393 Sound Detection Sensor Module for Arduino detects whether the sound has exceeded a threshold value. The sound is detected via 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. Specifications and Features : Working voltage: DC 3. 3 5V. Dimensions: 36. 5 x 17 x 10 (LxWxH)mm. Signal
