Circuit Simulation & PCB Design Tools

In the fast-paced world of electronics design, having the right tools at your fingertips can make all the difference between a concept that stays on paper and one that comes to life. Whether you’re just starting out or you’re a seasoned pro, circuit simulation and PCB design software help you prototype, test, and refine your ideas before you ever send files off for fabrication. Below is a curated roundup of both free and professional-grade applications, complete with links and brief descriptions, so you can quickly find the right fit for your next project.

Power Draw Tester & Injector - GPUs & Electronics; Diagnostics & Testing, etc.

"Homebrew" Power Tester/Injector - Electronics Diagnostic Tool!!

I built this device to allow me to measure the power being drawn by a device (meter on the right). If a device is working, it'll pull a certain amperage and voltage when power is applied.
But it can also inject power (meter/device on the left) to force very low amperage into a device, so I can check that device's board with a thermal camera for shorts.