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 →It is a special type of device that we use with electrical and electronic setups. Its main role is to deliver the voltage safely across the breadboard-related projects. It is used by students, researchers, and people doing experiments for their electric circuit projects for testing and learning. It is small, easy to carry, and can be used in place of big batteries and power setups. It is very popular among all the people who do electronic projects and electrical work.
It is used to check if your connections are working properly or not. If you are working on a project and want to test the functionality, you attach your project using cables to the breadboard and check if it is working or not. It can be used to connect the resistors, capacitors, sensors, and other electronic devices to check their functionality. You do not have to attach the linkages forever. You can do it temporarily to check the functionality and then remove the connections.
If you do not use a supply module, you will have to use other means to stabilize a voltage to your breadboard, which is difficult and can be dangerous. Over-voltage, or unstable voltage, can damage components. It is good to use a power supply for the following reasons:
It can be used in Arduino, sensor modules, for testing the circuits, and other electronic devices. You can use it in your DIY projects as well.
There are two power supply ports on the left side, a DC port, and a USB port.
On the right side, there are two ports of power output. You can switch the power voltage of both ports between 3.3V and 5V by the jumper cap.
The USB port can supply the only 5V. So if you use the USB port as a power supply, the jumper cap of the output port MUST be at 5V; or else, there will be no power supply.
The DC input port uses a 5.5mm/2.1mm plug, with a voltage ranging from 6.5V~12V. With a DC input, the output ports could switch between 3.3V and 5V.
Note: 12V is the voltage limit. If you use an AD-DC adapter, you're recommended to use 9V in case of unsteady voltage which may burn the board.
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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.
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