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Microphone Noise Decibel Sound Sensor 3p / 4p

$0.991 pcs
Using a microphone noise decibel measurement module, we can build a low-cost, highly practical noise measurement microphone by ourselves.
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Mini MAX3232 RS232 to TTL Level Conversion Board

$0.491pcs
The Mini MAX3232 RS232 to TTL level conversion board converts RS232 serial signals into TTL-level signals for reliable communication with microcontrollers. Its compact design and stable performance make it suitable for embedded systems and serial communication applications.
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MO3 Water Level Sensor

$0.471pcs
The MO3 Water Level Sensor is a non-contact liquid level switch that operates on a capacitive principle to detect the presence or absence of liquid. It is designed to be mounted on the outer wall of a container to detect the liquid level within.
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MO4 Water Level Sensor

$0.471pcs
The MO4 Water Level Sensor is a non-contact liquid level switch that operates on a capacitive principle to detect the presence or absence of liquid. It is designed to be mounted on the outer wall of a container to detect the liquid level within.
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MT3608(C)
MT3608
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MT3608 Boost Board

$1.001pcs
Ultra-compact size, wide input voltage range, adjustable output, high-efficiency conversion, easy operation, multiple versions available, versatile application scenarios
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MT3608 Boost Board Micro

$1.001 pcs
Compact size, wide input voltage, adjustable output, high conversion efficiency, easy operation, multiple versions, versatile applications
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MT3608 Boost Board TYPE-C

$1.001 pcs
Ultra-compact size, wide input voltage range, adjustable output, high-efficiency conversion, easy operation, multiple versions available, versatile application scenarios
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NE555 Electronic Keyboard

$6.491pcs
The frequency selection is realized by tapping the keys of S1-S8. Operate the corresponding button to make the speaker emit eight different notes.
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NE555 Pulse Duty Cycle Adjustable Generator
NE555 Pulse Duty Cycle Adjustable Generator
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NE555 Pulse Duty Cycle Adjustable Generator

$1.451 pcs
NE555 pulse frequency and duty cycle adjustable module, square wave and rectangular wave signal generator, stepper motor drive.
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NE555 Pulse Generator Module
NE555 Pulse Generator Module
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NE555 Pulse Generator Module

$0.991 pcs
NE555 module frequency-adjustable pulse generator module square wave and rectangular wave signal generator.
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NE555 Pulse Signal Generator
NE555 Pulse Signal Generator
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NE555 Pulse Signal Generator

$2.491 pcs
The NE555 pulse generator is a small signal generator with adjustable frequency duty cycle for square and rectangular waves.
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Time-Delay Relay Module08
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NE555 Time-Delay Relay Module

$3.001pcs
Sequential control, user-friendly operation, voltage compatibility, precise timing, high cost-performance ratio, multi-scenario adaptability
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