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 →This power module contains the function of automatic buck-boost and integrates with the related circuit of buck-boost converter. Its size is just as same as a dime, which is very easy for embedding.
Input voltage range 3~15V, fixed output voltage 5V, the maximum load current is 0.6A and its quiescent current is as low as 200uA. In theory, the work frequency of the module can reach to 1.2MHz. Besides, it has steady output voltage, which can work long time without voltage shift. The maximum conversion can reach to 85%. So it is suitable for the occasions with high requirements. You can use this power module to DIY mobile power pack and provide constant power for your projects.
FEATURES:
Small size, stable performance, wide voltage range for a variety of DIY applications
APPLICATIONS:
Power supply for controller main-board, DIY current source, floodlight, DIY toy car, communication device, digital radio.
| Serial number | Name | Direction | Application |
| 1 | Vo+ | output | Output positive current source |
| 2 | Vo- | output | Ground wire, output port current source reference |
| 3 | Vi- | input | Ground wire, link to current source reference |
| 4 | Vi+ | input | Power supply input:2.5-15Vdc |

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Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
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 →Wire a joystick to your Arduino, read X/Y, then print UP / DOWN / LEFT / RIGHT to the serial monitor.
read tutorial →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 →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 →Share what you built. Photos, BOM, what worked, what didn't.
view thread →Symptom + what you tried + clear photo = answers within hours.
view thread →Brownout reset when adding a sensor? Notes on supply decoupling and GPIO checks.
view thread →Upload failing on your first Uno? Driver, COM port, board match — checklist inside.
view thread →