Though the focus of this article is on the 10-minute timer circuit, we won't neglect the other timer projects, including the 1-minute, 5-minute, and 15-minute timer circuits. While the green LED shows when the timer is active, the red LED shows when the timing is complete and turns on beeper sounds.Īlso, you can easily set the time delays of an adjustable timer circuit from 1-10 minutes by changing the values of the variable resistor.ġ0 Minute Timer Circuit - Other 555 Timer Projects Adjustable timer circuits use two LEDs (green and red) as indicators. However, pin 3 will be low again after the calculated time duration-turning on the LED to indicate the completed course.Īlternatively, you can have a flexible 1-10 minute timer circuit with similar yet different working principles. When you activate the timer with the push button, it sets pin 3 high and turns off the LED. Initially, the timer sets pin 3 low and turn on the LED to indicate that it's not active. In contrast, the LED will stay off when the output pin is high. Thus, an LED will stay on when the output of the 555 timer's pin 3 is low. Generally, timer circuits work with reverse logic.
With that said, the 555 timer IC still works perfectly for the timer circuits in this article.
Here are some other tips to help in your configuration.ġ0 Minutes Timer Circuit Diagram Using An Adjustable Timer Circuit 10 Minute Timer Circuit - Working of The Timer CircuitĪlthough the 555 timer IC works best for generating time intervals up to 15 minutes, it's not particularly useful for generating anything higher. Additionally, use S1 as a push-button switch to reset the timer circuit. Make sure you build your circuit on a PCB of good quality and be sure to mount your IC1 on an IC base. However, the capacitor value (1000 uF) will not change. Now, T (time) equals 10 x 60 for this circuit since we're working with a 10-minute timer. Thankfully, it's not a complicated process, and you can do this with the simple formula below:
So, configuring this timer for 10-minute intervals involves setting the C2 to charge for 10 minutes and changing the resistance values of R4+R5.Īlternatively, you can set the resistor values only for a timer circuit to work at 10-minute intervals. Thus, the greater the value of C2 with an active IC 555 timer, the longer the course stays active.Īlso, the total resistance value between R4 and R5 governs the maximum period the circuit stays active. The configuration of C2, R4, and R5 of the above circuit diagram can determine the period of a timer circuit.
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