![]() ![]() Depending upon the setting of its pot, the IC triggers after a certain period og time interval. When power is switched ON this IC starts counting. Te timer sequence begins from the IC at the top left corner. ![]() ![]() The circuit consists of four identical stages, made up of the IC 4060 timer configuration. As the name suggest, the timer is pretty flexible and may be adjusted to produce any desired time periods, according to the above requested format. So here's the circuit that I came up with. Therefore if we assume the desired delay to be 1 hour or 3600 seconds, we can calculate it by substituting the values in the previous equation: Now, we have the sample delay and the resistor value responsible for this delay. Sample Delay / Desired Delay = Selected Resistor / Unknown Resistorįor example if you find the pin3 becoming high after 300 seconds, this becomes your sample delay value. Once this is noted, the other desired time delays could be calculated using the following simple cross multiplication:.Switch ON and carefully note down after how much time pin#3 of upper IC 4060 becomes HIGH.Connect any arbitrarily selected resistor above 100K in place of P1/R2 in the upper circuit.It can be done through a formula, but the manual way is much simpler and accurate. This further ensures that the timer shuts off completely in case a power failure occurs while the circuit is operational, which in turn ensures that crucial loads like heater, or geyser are completely turned OFF during such situations. The above design could be upgraded with a push-button to facilitate a push button start. The pot associated with the upper IC can be used for determining after how long the load will be switched ON, while the pot associated with the lower IC is used for determining how long the load remains in the switched ON position or simply after what time it should be switched OFF. It simply means that as long as the upper ICs timing does not lapse the lower IC remains idle, however once the upper ICs timing lapses and its output becomes high, it switches the output load as well as the lower ICs operation. The lower IC then starts counting and when its output goes high, it halts the upper ICs counting and resets it to its original state and the process is initiated back from the start. The output of the upper IC is coupled to the reset input of the lower IC via a transistor in such a way that once the upper IC's output goes high, it triggers the lower timer into operation. You may also want to make this Arduino based programmable timer circuit However though the timing settings are independent for the two sections, these are coupled with other such that their initialization become very much interconnected.īasically both the configurations are similar and have been rigged in the standard counting modes of the IC 4060 devices. Looking at the CIRCUIT DIAGRAM below we can see that two inexpensive IC 4060 have been wired up as two independent timer modes. The idea becomes so easily configurable due to the versatile IC 4060 which require minimal number of component for getting the unit running. ![]() In this page we will discuss a very simple yet reasonably useful timer circuit diagram whose ON time and OFF time settings are independently adjustable through ordinary pots. The ON time delay and the OFF time delay are independently settable and this facility becomes the most important feature of a programmable timer circuit. A true readout is displayed.The delay timings are adjustable according to the users personal specs. Driver Reaction Tester - practice your reaction times in your car, using your own button.Output is reversible for both air or electric throttle stops.Timing can be set to the thousandths of a second on stage 1 and 2.Scrolling on keypad for quick number changes.Programmable throttle stop over ride - allows you to speed your car up a set amount (set by you).Positive feel keypad for simple and quick programming (even with gloves on).Self-test mode on all display functions.Large illuminated display and keypad for day/night reading.Retains all numbers, even when power is disconnected.The Dual 4-Stage Timer's outputs can be used to control one or two of the following devices in the same pass, a Throttle Stop, Nitrous, or a shift on time Shifter. Product Description DUAL 4-STAGE TIMER The best stand-alone timer available. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |