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Thursday, March 23, 2017

Tag: monostable

FREE 555 timer simulators for electronics beginners

All of us know that NE555(or other versions) is a versatile IC for building big and small projects. Recently, I found some free simulators...

Remote Operated Switch

When you press an infrared transmitter or normal TV remote control near TSOP1738 infrared sensor, the 555 timer configured in monostable mode gets triggered.

Remote operated musical bell

Remote operated musical bell can be made combining the following circuits. a) Remote tester b) Basic RC circuit c) Simple Musical bell When a remote is pressed, the circuit plays a music. a) Remote tester

Mode of NE555- Astable

This circuit has been configured in Astable mode. The output pulses are determined by the values of resistors R1, R2 and the timing capacitor C1. The formula for the frequency of pulses is: f= 1.44/[(R1+2R2)*C1].

Sound generator and Musical toy organ

One of the main objectives of LDR Engineering projects is to make students capable of developing their own logic for making devices. Here is an example that tells how LDR Engineering helps in developing ideas.

Toggle switch

This 555 timer circuit below toggles the LED when a button is pressed. Pins 2 and 6, the threshold and trigger inputs, are held at 1/2 the supply voltage by the two 10K resistors.

Mode of NE555- Astable

This circuit has been configured in Astable mode. The output pulses are determined by the values of resistors R1, R2 and the timing capacitor C1. The formula for the frequency of pulses is: f= 1.44/[(R1+2R2)*C1]. The high and low time of each pulse can also be calculated.

Mode of NE555- Monostable

Monostable mode of operation Monostable mode of operation of 555 IC can be explained using a simple touch sensitive circuit. Here, timing constant (T) of monostable timer= 1.1*R1*C1. The following circuit has been configured in monostable mode. A monostable circuit produces a single pulse(for a certain duration determined by the Timing Constant(T)=1.1*R1*C1) when triggered at pin 2.

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