Fingerprint Sensor AS608 - A Beginner's Guide
One touch can replace keys. This project uses an optical fingerprint sensor to enroll users and then grant access with a quick scan.
read tutorial →
DC DC UBEC Step-Down (Buck) Converter 5V @ 3A output. Your power supply problems just got SOLVED! This little circuit board may look tiny but inside is a high efficiency DC/DC step-down converter which can output up to 3 Amp at 5V without the need of any heat-sink or forced cooling. (It does get a bit toasty at 3A though) UBEC stands for "universal battery eliminator circuit" and this UBEC is designed to replace a 5V supply in RC planes and 'copters but its also great for any kind of microcontroller or electronics project that runs off of 5V. We tried a half dozen different 'BECs and found this one to be the best in terms of range and stability. You can check the technical tab for the analysis of input/output range and current draw.
To use, connect 6V up to 16V (recommended) to the IN-side wires and 5V will be generated on the OUT-side wires. You'll get 5V (+-5%) regulated output from higher voltage input. 3A output current, 5A peak - if you're trying to draw 3A you'll need to give it a little more than 6V though, 7V works well. The UBEC has built in filter capacitors on the input and output, but its a switching supply so its a little noisy compared to a linear regulator.
Here are some numbers we found when attaching various loads to the UBEC:
| Iout | Vin | Iin | Vout |
| 0.5A | 6V | 0.47A | 4.9V |
| 0.5A | 7V | 0.39A | 5.2V |
| 0.5A | 9V | 0.35A | 5.2V |
| 0.5A | 12V | 0.28A | 5.25V |
| Iout | Vin | Iin | Vout |
| 1A | 6V | 0.9A | 4.8V |
| 1A | 7V | 0.79A | 5.2V |
| 1A | 9V | 0.67A | 5.1V |
| 1A | 12V | 0.52A | 5.2V |
| Iout | Vin | Iin | Vout |
| 2A | 6V | 1.85A | 4.9V |
| 2A | 7V | 1.67A | 5.1V |
| 2A | 9V | 1.28A | 5.0V |
| 2A | 12V | 0.97A | 4.9V |
| Iout | Vin | Iin | Vout |
| 3A | 7V | 2.6A | 5.0V |
| 3A | 9V | 1.88A | 4.7V |
| 3A | 12V | 1.43A | 4.8V |
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
Customers also bought
Build with this board
Thumb Joystick - A Beginner's Guide
Wire a joystick to your Arduino, read X/Y, then print UP / DOWN / LEFT / RIGHT to the serial monitor.
read tutorial →Motor Drive (BTS7960 43A) - A Beginner's Guide
Bench-test a 43 A motor driver before wiring the full project. Catches weak power, mis-pinning, and dead boards before they cost you time.
read tutorial →Raspberry Pi Pico (RP2040) - A Beginner's Guide
Coming from UNO and the Pico won't show a COM port? Here's the BOOTSEL trick, the driver fix, and the first sketch that actually works.
read tutorial →Notes from the bench
Ask the community
Project Showcase — show what you built
Share what you built. Photos, BOM, what worked, what didn't.
view thread →How to ask a good question (and actually get answers)
Symptom + what you tried + clear photo = answers within hours.
view thread →ESP32 brownout when wiring a sensor — fixes that worked
Brownout reset when adding a sensor? Notes on supply decoupling and GPIO checks.
view thread →First Arduino — sketch upload error, what to try?
Upload failing on your first Uno? Driver, COM port, board match — checklist inside.
view thread →