DATASHEET and Circuit Diagram

The following schematic shown the LM393 pinout diagram. According to the datasheet, LM393s are low power dual voltage comparators which consist of two independent low voltage comparators designed specifically to operate from a single supply over a wide range of voltages.

And here are the LM393 Dual Voltage Comparator Pinout description:
1.  Output 1
2.  Inverting input 1
3.  Non-inverting input 1
4.  Vcc (-)
5.  Non-inverting input 2
6.  Inverting input 2
7.  Output 2
8.  Vcc (+)

LM393 Dual Voltage Comparator Pinout and Datasheet continued »

An article contains information related to the Basic Operation Theory of Linear Regulators is provided herein. It might help for understanding the most commonly used regulating modes by the linear regulators (standards, low dropout, quasi low dropout).

Sections about how a linear regulator works can be found in this document, for such basic linear regulator, the control loop operation, linear regulator types (LDO, Standard, Quasi LDO), how to select the best regulator for your applications, built-in protection circuits (thermal shutdown, current limiting), voltage error amplifier, mistakes often made in applying linear regulators (output capacitor used, loop response of a typical regulator, controlling the ESR of the output capacitor, the load regulation on fixed and adjustable linear regulators).

Understanding the Basic Operation of Linear Voltage Regulators continued »

What follows below is the schematic of Flashlight Finder circuit diagram using the LM3909, a monolithic oscillator designed to flash Light Emitting Diodes (LEDs).

As seen in the above circuit: the LM3909, capacitor, and LED are installed in a white translucent cap on the flashlight’s back end. For flasher power, a contact strip is needed in addition to the case connection.