This is a very simple Electronic Circuit Project for LED Circuit
Project Using with 555 IC. This circuit LED reproduces the first LED
sequence at this time used by FISA on behalf of Formula single racing.
It may perhaps be alive used with slot car sets (such for example HO
shin up AFX/Life Like/Tyco sets) or else means of communication
controlled cars. IC1, a 555 timer IC, is used as a watch pulse
generator. Its output is fed via NAND gates IC2a and IC2c to IC3, a 4024
binary counter. IC2b inverts the O4 output of 4024 binary counter IC3.
originally, IC3 is reset and all its outputs are low, together with O4,
which causes IC2b to present-day a rational climax to the pin 8 input of
IC2c which after that passes pulses from the 555 timer circuit to the
clock input of the 4024. IC3 then begins together with.
LED Circuit Project Using with 555 IC:
Following the count has reached binary 1111, the subsequently pulse
sends the O4 output of IC3 high, which disables IC2c and IC3 stops with.
The four used outputs of IC3 are connected to a resistor ‘ladder’ which
acts to the same degree a clear-cut digital to analog convert-er (DAC).
As the count increases so does the voltage produced by the side of the
top of the ladder and this is connected to the inverting inputs of four
comparators inside IC4 (an LM339) and to IC5, which is a 741 op amp
furthermore connected while a comparator.
The categorical inputs
of the comparators are connected to the taps of a voltage dividing wall,
with the drumming voltages settle on using VR1, a 100kO trimpot. As IC3
counts, the rising stepped voltage from the DAC ladder switches the
comparators on clothed in sequence, preliminary with IC4d and working up
to IC5. in the same way as both comparator is curved on, its pair off
of LEDs is lit; former LEDs 1 & 2, next LEDs 3 & 4 and so on. as
soon as all five pairs of LEDs are lit, the then pulse from IC1 moves
the binary count of IC3 to 10000, so the DAC voltage drops back to zilch
and all LEDs are extinguished. by the same spell, with too stops, for
the reason that the area of high pressure on O4 causes IC2c to check
extra gate pulses. The circuit in that case remains reserve until the
counter is reset by urgent pushbutton switch S1. This allows a recent
sequence to initiate.
source By:w3circuits
Saturday, July 15, 2017
LED Circuit Project Using with 555 IC
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