Anyone know of a website that has information on such chips/circuits on 4017 Decade Counter and a 555 astable? :helpsmile:
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Anyone know of a website that has information on such chips/circuits on 4017 Decade Counter and a 555 astable? :helpsmile:
Just use Google. There is plenty of information there. Those are very common chips and have been around a long time, especially the 555 timer.
Also, look into the 556 chip. Which is a dual version of the 555.
What kind of chips are these? What do they do?
The 4017 decade counter is a .... counter. Cmos technology which means it can operate on voltages between about 3 and 15 volts. It has one input signal and 10 output signals (which is why it is called a decade counter). It also has a carry output. Only one output signal is high at any one time. When reset, the 0 signal is high. For every input signal received, the active output signal moves on to the next pin. When the counter goes from 9 to 0 the carry signal goes high. It goes low when the chip is reset or when the counter gets to 5.Quote:
Originally posted by bigdawgfoxx@22 February 2004 - 19:11
What kind of chips are these? What do they do?
The 555 timer chip is just that, a timer. The values of resistors and capacitors connected determine the duration of the output pulse from the moment it is triggered. With the right sort of feedback circuitry, the chip can be made to trigger itself giving an alternating on/off pulse. It is also a cmos device so again it operates on 3 to 15 volts.
Both these chips are over 30 years old.
The 4017 decade counter is a .... counter. Cmos technology which means it can operate on voltages between about 3 and 15 volts. It has one input signal and 10 output signals (which is why it is called a decade counter). It also has a carry output. Only one output signal is high at any one time. When reset, the 0 signal is high. For every input signal received, the active output signal moves on to the next pin. When the counter goes from 9 to 0 the carry signal goes high. It goes low when the chip is reset or when the counter gets to 5.Quote:
Originally posted by lynx+22 February 2004 - 19:50--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (lynx @ 22 February 2004 - 19:50)</td></tr><tr><td id='QUOTE'> <!--QuoteBegin-bigdawgfoxx@22 February 2004 - 19:11
What kind of chips are these? What do they do?
The 555 timer chip is just that, a timer. The values of resistors and capacitors connected determine the duration of the output pulse from the moment it is triggered. With the right sort of feedback circuitry, the chip can be made to trigger itself giving an alternating on/off pulse. It is also a cmos device so again it operates on 3 to 15 volts.
Both these chips are over 30 years old. [/b][/quote]
thanks exactly what i needed :D