DIY Weevil Eye LED Soldering Kit – Beginner Electronics Kit

Build your own photosensitive Weevil Eye LED circuit from scratch with this hands-on DIY electronics kit — the perfect introduction to soldering, circuit assembly, and electronic fundamentals. Ideal for beginners, hobbyists, students, and anyone looking for a rewarding STEM gift.

⚠️ Please Note: This kit is designed for individuals with basic electronics or circuit experience. Assembly success depends on soldering technique and component orientation. Please read all instructions carefully before beginning. Batteries are not included.

How It Works

The Weevil Eye kit features a photosensitive (light-detecting) sensor circuit. When assembled, the LED eyes automatically illuminate in dim or dark conditions — and switch off in bright light. It's a fantastic demonstration of photosensitivity principles in electronics!

Assembly & Testing Tips

• After soldering, insert a CR2032 button battery (20mm, face up) into the battery box to test.
• If the LED doesn't light up, cover the sensor with your finger — this simulates darkness and should trigger the LED.
• Check all solder joints to ensure solid connections between components and the PCB. Solder should flow into the board, not pool around pins.
• Verify that the transistor and LED components are correctly oriented before applying power.

Kit Highlights

• ✅ Photosensitive LED circuit — lights up automatically in low-light conditions
• ✅ Great for soldering practice and circuit assembly training
• ✅ Suitable for beginners and electronics enthusiasts
• ✅ Uses a standard CR2032 coin battery (not included)
• ✅ Compact, portable design — great as a STEM gift or educational project
• ✅ No high-concern chemicals

Specifications

• Brand: LOTHYE
• Model: Weevil Eye Electronic DIY Kit
• Battery: CR2032 (not included)
• High-Concern Chemicals: None
• Made in: Mainland China

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Learn more: OSHA on eye and face protection

Frequently Asked Questions

Q: Is this DIY Weevil Eye LED soldering kit suitable for complete beginners?

A: This kit is best suited for individuals with some basic circuit or soldering experience. Complete beginners are welcome to try, but we recommend reviewing soldering fundamentals first to ensure a successful build. It makes a great learning project for students and electronics hobbyists alike.

Q: What battery does the Weevil Eye LED kit use, and is it included?

A: The kit uses a standard CR2032 20mm coin battery. Please note that the battery is not included in the kit and must be purchased separately.

Q: How do I test the circuit if the LED doesn't light up after assembly?

A: First, cover the photosensitive sensor with your finger to simulate low-light conditions — the LED should illuminate. If it still doesn't light up, inspect your solder joints for solid connections, and double-check that the transistor and LED are correctly oriented on the PCB board.