MHT7-ME555 Eight Note Electronic Keyboard Module DIY Sound Kit With 8Ω 0.5W Speaker Blue PCB Button Music Learning Board For Electronic Project

📌 Product Overview The MHT7‑NE555 eight‑note electronic piano kit is a classic electronic production DIY soldering set based on the NE555 timer chip. Each button corresponds to an independent musical scale. Press different keys to output different tones and play simple melodies. It comes with complete discrete components, PCB board, speaker and operation manual, suitable for electronic practice, circuit principle learning and STEM handmade projects. The finished module adopts 5V DC power supply, with a terminal block for power input and a reserved speaker welding position. It is a preferred teaching kit for beginners to practice soldering and understand the working principle of oscillating circuits. ✨ Core Features

• Classic NE555 oscillator circuit design, 8‑tone scale output
• Complete scattered parts for manual welding assembly
• 5V DC operating voltage, powered by terminal block
• 0.5W / 8Ω supporting speaker for sound playback
• Clear scale marking on PCB: Do‑Re‑Me‑Fa‑So‑La‑Si‑Do
• Low power consumption, simple peripheral circuit, easy for beginners to debug
• Comes with detailed assembly guide, circuit schematic and resistor color‑mark tutorial

📋 Product Parameters

Item	Specification
Product Name	MHT7‑NE555 Eight‑Note Electronic Piano Kit
Main Chip	NE555
Working Voltage	5V DC
Speaker Parameter	0.5W, 8Ω
Power Interface	KF301‑2P terminal block
Working Temperature	-40℃ ~ +85℃
Assembly Type	Discrete components DIY soldering

📐 Dimension Info Long strip PCB design, compact structure for handheld use after welding. ⚠ Important Usage Notice

1. Pay attention to the resistance value during soldering to avoid mixing up 1K and 10K resistors.
2. Electrolytic capacitors have polarity; the longer pin is the positive pole.
3. The NE555 chip notch must align with the mark on the IC socket.
4. Distinguish the positive and negative poles of the speaker wire when welding.
5. Strictly use 5V DC power supply, reverse connection of power supply is prohibited.

🛠 Application Scenarios

• Electronic soldering practice for students and electronic beginners
• STEM physics and electronic teaching experiment kit
• DIY handmade electronic production, science and technology competition works
• Learning the principle of 555 timer oscillation frequency adjustment