This is a design circuit fir timer circuit that is based using 4060B. This is the figure of the circuit;
The pins labeled in red Q4-Q14 are the binary outputs: Q4 for the 16's, Q5 for the 32's, Q6 for the 64's and so on up to Q13 for the 8192's, and Q14 for the 16384's. Just three external components are required to control the 4060B counter - two resistors and one capacitor. The frequency of the internal oscillator (i.e. the speed of the count) is set according to the equation. Since Q14 represents the 16,384's and Q4 represents the 16's - we know it will take 1,024 times longer (16,384 / 16) for Q14 to flip from 0 to 1 than it takes Q4. So, for an example 2-hour timer (=7,200 seconds), we just need to fine-tune the circuit so that Q4 turns on after 7,200 / 1,024 seconds = 7.03 seconds, knowing that if that is done correctly, after exactly 2 hours Q14 will flip from 0 to 1.
The pins labeled in red Q4-Q14 are the binary outputs: Q4 for the 16's, Q5 for the 32's, Q6 for the 64's and so on up to Q13 for the 8192's, and Q14 for the 16384's. Just three external components are required to control the 4060B counter - two resistors and one capacitor. The frequency of the internal oscillator (i.e. the speed of the count) is set according to the equation. Since Q14 represents the 16,384's and Q4 represents the 16's - we know it will take 1,024 times longer (16,384 / 16) for Q14 to flip from 0 to 1 than it takes Q4. So, for an example 2-hour timer (=7,200 seconds), we just need to fine-tune the circuit so that Q4 turns on after 7,200 / 1,024 seconds = 7.03 seconds, knowing that if that is done correctly, after exactly 2 hours Q14 will flip from 0 to 1.
THIS IS A GOOD CIRCUIT USING IC4060B. WE CAN USE IT IN TIMER RELAYS........
ReplyDeleteI'd like to make a 24 hour cct, so I'd take RANGE to pin 3.
ReplyDeleteBut since I don't need it to be a value between 12 hours and 24 hours what do I do with pins 9,10,11 ? uhours
does this circuite use a 555 C.I?
ReplyDelete