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0–30V Adjustable DC Regulated Power Supply DIY Kit — 0–3A, Current Limiting, Short Circuit Protection
0–30V Adjustable DC Regulated Power Supply DIY Kit 0–3A, Current Limiting, Short Circuit Protection
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$21.52 USD
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0–30V Adjustable DC Regulated Power Supply DIY Kit — 0–3A, Current Limiting, Short Circuit Protection
This 0–30V / 0–3A adjustable DC regulated power supply DIY kit is a complete through-hole soldering project that produces a professional-grade linear bench power supply. With continuously adjustable voltage from 0V to 30V and current limiting from 0A to 3A, it provides the two most essential controls for safe electronics development — voltage setting and current limiting to protect circuits under test. The linear regulation topology delivers ultra-low ripple (0.01%) and excellent load regulation, making it superior to switching power supplies for sensitive analog and RF circuit testing.
Key Specifications
| Parameter | Value |
|---|---|
| Output Voltage | 0V – 30V DC (continuously adjustable) |
| Output Current | 0A – 3A (continuously adjustable) |
| Input Voltage | 24V AC (transformer required, not included) |
| Ripple & Noise | ≤0.01% (linear regulation) |
| Voltage Regulation | ≤0.01% |
| Current Limiting | Yes (adjustable, LED indicator) |
| Short Circuit Protection | Yes (auto-recovery) |
| Display | Dual LED voltmeter + ammeter (optional) |
| Kit Type | Through-hole DIY soldering kit (PCB + components) |
Linear vs Switching Power Supply — Which to Choose?
| Feature | Linear (This Kit) | Switching PSU |
|---|---|---|
| Ripple & Noise | ≤0.01% (ultra-low) | Higher (switching noise) |
| Efficiency | 30–60% | 80–95% |
| Heat Generation | Higher (pass transistor) | Lower |
| Best For | Analog, RF, audio circuits | Digital, high-power loads |
| Transient Response | Excellent | Good |
What You Learn Building This Kit
- Linear voltage regulation — how pass transistors and op-amp feedback control output voltage
- Current limiting circuit — how to implement adjustable current limiting with LED indication
- Through-hole soldering — resistors, capacitors, transistors, op-amps, and transformers
- Power supply design — rectification, filtering, and regulation stages
- Short circuit protection — auto-recovery protection circuit design
Why Choose This DIY Power Supply Kit?
- ✅ 0–30V / 0–3A full range — covers all common electronics bench supply requirements
- ✅ 0.01% ripple — ultra-clean output for sensitive analog and RF circuits
- ✅ Adjustable current limiting — protects circuits under test from overcurrent damage
- ✅ Short circuit protection — auto-recovery, no fuse replacement needed
- ✅ DIY soldering kit — educational project with practical bench tool outcome
Typical Applications
- Electronics bench power supply for circuit development
- Battery charging with adjustable voltage and current
- LED driver testing with current limiting
- Analog and RF circuit testing (ultra-low ripple)
- Electronics education and soldering practice
- Maker and hobbyist lab power supply
Package Contents
- 1 × PCB with all through-hole components (resistors, capacitors, transistors, op-amps, potentiometers)
- 24V AC transformer and enclosure not included
