Wednesday, November 21, 2018
AAA Battery Protection with Wrong Polarity LED Indicator
This simple circuit will protect the AA or AAA battery from the wrong polarity connection to your device. If the battery is connected in the opposite way, D1 will conduct and PTC Fuse will break the circuit. Wrong polarity indicator, LED 1 will be turned on at the same time.
Hot-Swap Circuits with Inrush Current Limiter
To provide continuous current sensing and limiting, this hot-swap circuit uses a PNP transistor and a current sense resistor of 0.333R. Wh...

-
This EMI filter includes a common-mode filter and a differential-mode filter. Generally Differential mode filter filters noise less than 3...
-
When designing a PCB board, it is important to determine the necessary clearance for screw holes. The table below shows the general screw si...