Inside the cool laser-cut box is an Arduino Uno and a 9V battery, plus a current-limiting resistor and the all-important buzzer. We like how [newsonator] wired up the LEDs to the Arduino by ...

The value of the resistor is typically between 330 ... The image shown below indicates the basic wiring diagram of the current limiting resistors and driver transistors. Next is the Hookup diagram of ...

Trying to do some research, one thing I kept stumbling upon was the 500 mA limit. That didn’t really help, since none of the devices I used even attempted to indicate their power consumption on ...

The simple addition of a transistor and resistor to the open-circuit drive overcomes this dilemma by limiting current through the drive transistor. Transistor Q2 provides the open-collector drive ...

Current limit is set by a resistor (soft-start is included) and an open-drain flag output is pulled low during over-current, over-temperature and reverse-voltage conditions. Under-voltage lock-out is ...

Major faults result in immediate latch off of the supply. Current-limit thresholds are set via a sense resistor, a resistor divider sets over/under-voltage thresholds, and a capacitor sets timing.