Electronics Circuit Diagram

Simple Design of PWM Speed Control Circuit using LM555H. The LM555H is wired as an astable and the frequency is constant and independent of the duty cycle. PWM Speed Control Circuit Parts List: R1, R2, R3, Q1, C1.

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The following schematic shows the Build Simple InfraRed IR Transmitter Circuit Diagram using NE555 or LM555. The circuit can be controlled using any TTL or RS-232C level control signal which makes the interfacing very simple.

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The following article discuss about Count-Down Timer Circuit Design using NE/LM555 IC. The circuit consists of 3 parts: an oscillator, a ripple counter and two switching transistors.

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This Digital Stop Watch circuit design is built using the LM555 IC and 4-digit counter IC with multiplexed 7-segment output drivers (MM74C926). The LM555 (available in 8-pin MSOP package) is a highly stable device for generating accurate time delays or oscillation. The MM74C926 is a CMOS counters consist of a 4-digit counter.

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