How to systematically check your circuit when it doesn’t work
Instead of guessing, use a step-by-step approach: check power supply, component placement, and soldering.
Ask: Is everything connected correctly? Are the components facing the right direction?
How to use a multimeter for basic circuit testing
A multimeter is a tool that helps measure voltage, resistance, and check continuity (whether electricity can flow through a wire or connection).
You’ll use the continuity mode to check if any wire or joint is broken inside.
Common problems and how to fix them
Loose solder joints – fix them by resoldering.
Wrong component orientation – for LEDs or capacitors, check polarity.
Battery not connected properly – make sure it’s giving power.
Burnt components – replace them with new ones.
Why troubleshooting is an essential part of making
Every maker makes mistakes. Finding and fixing them helps you learn faster and become more independent . Troubleshooting builds confidence and teaches patience.