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What creates resistance in a circuit?

I'm planning to add a momentary switch to a single loop DC circuit. Will this cause any amount of resistance in the circuit? I'm a complete noobie when it comes to electronics, any resource links or clarification is appreciated. I know the type of material/width of wire and a pot will cause resistance but will any component put...

How to properly size a serial bulb for protection when troubleshooting a circuit?

Hello. I'm a hobbist on electronics repairs, and I did some repairs on stuff powered from the wall socket before, using a serial bulb to protect the circuit in case there's a short. Now I want to troubleshoot a board that works at 3V and very low current (like no more than 100mA). So, how can I properly size the bulb I need for...

Linux Cracking Bible - The GNU Testament

Heyo, I recently posted some notes about cracking games on Linux. Those notes originally started as a reply to someone, but they evolved into more of a small treasure map for a lot of the important parts of cracking games on Linux. As I finished up the post, I noticed that it was almost exactly at the maximum length it could be...

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