🔌 LM317 Adjustable Voltage Regulator DIY Kit — 1.25V to 12V Learning Power Supply
Compact LM317 adjustable regulated power supply kit designed for DIY electronics learning, soldering practice, bench experiments, and small low-power circuit projects. This kit combines an adjustable DC output, a simple signal generator function, a logic probe function, and a buzzer continuity test in one practical training-style unit.
It is a strong fit for electronics enthusiasts, students, and hobby builders who want a compact educational project that is also useful for basic circuit testing and low-current power supply work.
🔧 Key Features
⚡ Adjustable Regulated Output — variable output from 1.25V to 12V
🧠 DIY Learning Platform — ideal for electronics practice and training builds
📡 Signal Generator Function — includes one adjustable signal output channel for simple pulse testing
🖊️ Logic Pen Function — helps check the current logic level in a circuit
🔔 Buzzer Continuity Test — convenient wire continuity and low-frequency signal checking
🛡️ Transparent Protective Shell — enclosed in a clear plastic case secured with screws
📦 Compact Bench Format — suitable for desk, lab, and hobby use
🆚 What This Kit Is Best For
Electronics Learning & Training
Use it when you want a practical project for learning basic power regulation, testing, and circuit interaction.
Small Low-Power Circuit Supply
Good for powering simple DIY circuits that stay within the listed 1.25V–12V / 200mA output range.
Basic Bench Testing
Useful for continuity checks, simple logic-level testing, and low-frequency signal work in small electronics projects.
⚙️ Core Features
Product Name: LM317 Adjustable Regulated Power Supply
Product Model: CAI-203
Main Function: low-power adjustable DC regulated output
Extra Functions: signal generator, logic pen, buzzer continuity test
Housing: transparent plastic shell
📐 Key Specifications
Output Voltage: 1.25V–12V adjustable
Output Current: 200mA
Power Supply Voltage: US 110V
Transformer Power: 2.5W
Power Cord Length: 1M
Output Line Length: 20CM
Shell Size: 11.2 × 6.9 × 4CM
Circuit Board Size: 7.2 × 6.2CM
Product Weight: 270g
Shell Material: transparent plastic shell secured with four screws
🧠 Quick Selection Guide
Need a learning kit for basic regulated power supply concepts? This is a strong fit.
Need a compact training project with extra test functions? The signal, logic, and buzzer features make it more versatile than a simple regulator board.
Need a high-current adjustable bench power supply? Choose a different model — this kit is limited to 200mA output.
Need a ready-made professional lab supply? This product is better suited for DIY learning and light bench tasks.
🧰 Typical Uses
DIY electronics learning
Soldering and training practice
Small circuit powering
Continuity testing
Basic logic-level checking
Simple pulse / signal testing
Hobby bench work
🔌 Wiring & Safety
This unit is powered from US 110V AC and provides a low-power regulated DC output.
Use it only within the listed 1.25V–12V and 200mA range.
Do not connect loads that exceed the output current capability.
Always handle mains-powered equipment carefully and use in a dry, protected workspace.
Before connecting a circuit, verify the output voltage setting to avoid damaging sensitive components.
⚠️ Important Notes
This is a low-current training / DIY style power supply kit, not a high-power bench supply.
It is best suited for small electronics projects and learning use.
The continuity buzzer and logic probe functions are intended for simple testing tasks, not as replacements for advanced instruments.
Always confirm load requirements before use.
📦 Package Includes
1 × LM317 Adjustable Voltage Regulator Kit
💥 Volume Discount — Buy More & Save
10% OFF when you buy 2 units
15% OFF when you buy 3 units
20% OFF when you buy 4 or more units
Discount auto-applied.
🇺🇸 Premium Support & Shipping
🇺🇸 US Stock / Fast Shipping — 2–4 day delivery from Oklahoma, USA. Your purchase supports a US-based small business.
🧪 Quality Checked & Tested — spot-checked before shipping.
🔁 Easy Returns — 30-day returns; we pay return shipping.
📦 Professional Packaging — safe delivery, 100% guaranteed.
Compact LM317 adjustable regulated power supply kit designed for DIY electronics learning, soldering practice, bench experiments, and small low-power circuit projects. This kit combines an adjustable DC output, a simple signal generator function, a logic probe function, and a buzzer continuity test in one practical training-style unit.
It is a strong fit for electronics enthusiasts, students, and hobby builders who want a compact educational project that is also useful for basic circuit testing and low-current power supply work.
🔧 Key Features
⚡ Adjustable Regulated Output — variable output from 1.25V to 12V
🧠 DIY Learning Platform — ideal for electronics practice and training builds
📡 Signal Generator Function — includes one adjustable signal output channel for simple pulse testing
🖊️ Logic Pen Function — helps check the current logic level in a circuit
🔔 Buzzer Continuity Test — convenient wire continuity and low-frequency signal checking
🛡️ Transparent Protective Shell — enclosed in a clear plastic case secured with screws
📦 Compact Bench Format — suitable for desk, lab, and hobby use
🆚 What This Kit Is Best For
Electronics Learning & Training
Use it when you want a practical project for learning basic power regulation, testing, and circuit interaction.
Small Low-Power Circuit Supply
Good for powering simple DIY circuits that stay within the listed 1.25V–12V / 200mA output range.
Basic Bench Testing
Useful for continuity checks, simple logic-level testing, and low-frequency signal work in small electronics projects.
⚙️ Core Features
Product Name: LM317 Adjustable Regulated Power Supply
Product Model: CAI-203
Main Function: low-power adjustable DC regulated output
Extra Functions: signal generator, logic pen, buzzer continuity test
Housing: transparent plastic shell
📐 Key Specifications
Output Voltage: 1.25V–12V adjustable
Output Current: 200mA
Power Supply Voltage: US 110V
Transformer Power: 2.5W
Power Cord Length: 1M
Output Line Length: 20CM
Shell Size: 11.2 × 6.9 × 4CM
Circuit Board Size: 7.2 × 6.2CM
Product Weight: 270g
Shell Material: transparent plastic shell secured with four screws
🧠 Quick Selection Guide
Need a learning kit for basic regulated power supply concepts? This is a strong fit.
Need a compact training project with extra test functions? The signal, logic, and buzzer features make it more versatile than a simple regulator board.
Need a high-current adjustable bench power supply? Choose a different model — this kit is limited to 200mA output.
Need a ready-made professional lab supply? This product is better suited for DIY learning and light bench tasks.
🧰 Typical Uses
DIY electronics learning
Soldering and training practice
Small circuit powering
Continuity testing
Basic logic-level checking
Simple pulse / signal testing
Hobby bench work
🔌 Wiring & Safety
This unit is powered from US 110V AC and provides a low-power regulated DC output.
Use it only within the listed 1.25V–12V and 200mA range.
Do not connect loads that exceed the output current capability.
Always handle mains-powered equipment carefully and use in a dry, protected workspace.
Before connecting a circuit, verify the output voltage setting to avoid damaging sensitive components.
⚠️ Important Notes
This is a low-current training / DIY style power supply kit, not a high-power bench supply.
It is best suited for small electronics projects and learning use.
The continuity buzzer and logic probe functions are intended for simple testing tasks, not as replacements for advanced instruments.
Always confirm load requirements before use.
📦 Package Includes
1 × LM317 Adjustable Voltage Regulator Kit
💥 Volume Discount — Buy More & Save
10% OFF when you buy 2 units
15% OFF when you buy 3 units
20% OFF when you buy 4 or more units
Discount auto-applied.
🇺🇸 Premium Support & Shipping
🇺🇸 US Stock / Fast Shipping — 2–4 day delivery from Oklahoma, USA. Your purchase supports a US-based small business.
🧪 Quality Checked & Tested — spot-checked before shipping.
🔁 Easy Returns — 30-day returns; we pay return shipping.
📦 Professional Packaging — safe delivery, 100% guaranteed.
