The post discusses a simple and effective industrial timer circuit which can be universally used for most industrial and home timer based applications. The idea was requested by Mr. Vasilis K.
Technical Specifications
我对4060 IC连接为“一击计时器”有疑问。如果它可以从颗粒燃烧器电路上的两个单一物品上供电，则将从引脚＃3获取输出，这是最后一个计数到C1阶段的输出，该工作是否有效？
当将电源应用于电路时，前两个阶段应保持较低水平，直到时间过去。引脚＃3应该设置为激活周期，因此当我早上离开家时，我将通过恒温器启动计时器。
Then when I get home, the burner should be running.
更准确地说，根据the circuit designthere are 2 monostable circuits (Stage 1&2) when power is applied via a room thermostat it activates the cycle (Stage 1&2),
My request is when power is applied after the predetermined time of the 4060 has elapsed, is to activate the cycle (Stage 1&2), as there is no need for the burner to run when no one is around, plus this would be ideal as it takes about an hour for the water temperature to reach at 75 Celsius.
The Design
当涉及任何基于计时器的工业或家庭项目时，IC 4060是一个绝佳的选择。该芯片作为CMOS设备非常准确，并且能够以相当良好的精度生成高达10小时的时间延迟，此后的精度往往会稍微漂移。
Although the IC 4060 generates a fixed 50% duty cycle astable type of oscillations at its various outputs, it can be configured as a one shot timer, as explained in the present article.
Referring to the shown simple industrial adjustable timer circuit, we can see the IC being the central main component of the whole design.
When power is applied or switched ON, C2 momentarily pulses pin#12 of the IC and resets the timing so that the internal oscillator begins counting from zero, moreover the IC can be reset at any moment during the counting period by pressing the given reset switch.
While the IC counts, the output which is being used (pin#3 here) is held at a low logic level or a zero voltage, which keeps the TIP122 switched OFF
现在根据R2的设置或选择,P1和C1, as soon as the set timing elapses, pin#3 goes high, switching ON the transistor and allowing the power to pass to the connected circuit, which now activates.
The feedback diode from pin#3 to pin#11 instantly locks the internal oscillator and latches the circuit so that the circuit freezes in that position until the reset switch is pressed for initiating a new cycle.
Circuit Diagram
对于较重的负载，上述电路可以通过继电器升级，以取得相同的结果，但负载电流的处理能力更高。
Feedback from Mr. Vasilis:
Hello swagatam!
TESTED & WORKING, really happy with the outcome, i used the 2nd circuit with the relay as i didn't have that specific transistor, that would be my last request for you, i hope i wasn't that much of a pain, again really thankful for all the help and effort, god bless you!!
Regards
Vasilis K.
Helo LWN2012
You will have to show me the diagram that you have constructed only then i would be able to provide an appropriate suggestion.
sir i already emailed you the diagram.
Sir.. Can you please design for me a circuit that counts down from 30 seconds to 0,that has a reset button which brings back the timer to 30. And also a pause button,this circuit will serve as a 30 second shot clock for amateur basketball. This is what I need for my school project.
Thank you sir in advance.
Hoping for your help.
Hi Jason, I'll try to do it soon.
gud day can you please post an effective PWM for my HHO. 12v, 60 A.
thanks a lot in advance
you can try the one given in the following link, the motor points may be used as the supply for the electrodes
//www.addme-blog.com/2012/05/make-this-pwm-based-dc-motor-speed.html
Hi June,
you can achieve up to more than 10 hours of delay with reasonable accuracy with this IC.
P1 and C1 are the two components which directly determine the delay durations, increasing their values will increase the delay length and vice versa. the results will be very linear so it's just a matter of some trial and error until you are able to calibrate the P1 knob dial with the related delay magnitudes (numbers)
您是六月的corect，为了获得相反的响应，您可以尝试用BC557替换BC547，并将其发射器连接到正面的正面供应，而在电路的收集器/地面上继电器/二极管组件，这将颠倒响应根据您的喜好
You can use 2 NPN transistors instead of one PNP transistor.
是的，这是可能的！
Thank u. waiting for the circuit…
hi swagatam,
换句话说，可能会获得一个Opposte的一击计时器，当我按按钮时，负载是在预设的时间上进行的，这次过去了，关闭了负载开关，并且计时器仍在等待下一个按下。
thank you so much
Hi andrea,
you can achieve it through the first two circuit shown in the following article
//www.addme-blog.com/2012/05/simple-delay-timer-circuits-explain.html
or this
//www.addme-blog.com/2014/11/long-duration-timer-circuit-using.html
or you can also use a IC555 monostable circuit design
非常感谢您的这篇文章。我已经寻找了一段时间了。我想以一种我不需要重置按钮的方式设计我的。我希望它能以任何时间应用于电源的方式工作，它可以激活3小时的继电器，然后在三个小时后停用继电器，直到卸下电源为止。当再次应用电源时，该过程会重复自我。这是我的问题
1. In the comment, you said that in order to keep the relay activated during the timing period, the BC547 should be replaced with BC557 and that the emitter should be connected to the positive supply and relay-diode assembly should be connected between the collector of BC557 and GND. Please I need you to confirm that sir.
2. What value of P1 and C1 should I used in order to achieve 3hours of timing? If there is a formula for it, kindly help me with it.
Thank you for all your efforts sir.
Hi Godson, yes that’ correct, use PNP to initiate the relay with power switch ON, the push button is for resetting the timer to zero, it is not required to start the timing, the timer will automatically start as soon as power is switched ON. the reset button can be used to reset the timing to zero anytime.
use any small arbitrary value for C1, note the timing delay for this C1 practically and then divide 3 hours with this delay value.
make sure to convert 3 hours to seconds if the delay value was in seconds.
答案将是您的新C1
Thank you very much for the response sir. I’ll do as you said. In the case of using a PNP transistor, how will the “time elapsed LED” be connected?
connect the LED through a 1K resistor from positive to the pin of the IC associated with the BC557 base
Hello sir Swagatam,
I have connected the circuit as shown in the post with the indicator LED for testing but rather than staying off, the LED keeps blinking before staying on and then resumes blinking again, and then stay on. The process continues indefinitely. What could be the problem sir?
Hello Godson, that shouldn’t happen, because initially the red LED must stay OFF, and as soon as pin#3 goes high after the elapsed period the positive from this pin should latch pin#11 stopping the counting and causing the LED to become solid (pin#3 latched at permanent high).
you can try changing the pin#12 0.1uF cap with a higher value capacitor and see if it helps…also while testing power the circuit from a good 12V DC power supply.
嗨，斯瓦加塔姆，
I have simulated your design plan on proteus, but it does not run.
Can you see if I have simulated properly?
https://imgur.com/n4Ub9Yx
Hi Tanaka, I have tested this circuit practically, for me it worked perfectly. By the way I don’t use simulators, instead I use my knowledge and practical verification for confirming a circuit. Sometimes circuits don’t work initially due to some minor mistake, which we have to troubleshoot with little effort to make them work…
Thanks, i Will try again.
good day sir….thanks for helping, but engineer Swagatam how will someone show you appreciation? perhaps by giving you gift or any thing..please I need a circuit that will turn ON a relay by 6pm and turn OFF the relay by 6am please help
Thanks sunshine, No problem, I am happy to help without any gifts!
For a 12 hour accurate timer circuit you can perhaps try the following design:
//www.addme-blog.com/how-to-make-long-duration-timer-circuit/
Engr.Swag. you have not answered my question, hope all is well. I need to make a RF switching circuit..or any wireless circuit
阳光, which question are you reffering to? there are plenty of wireless circuits in this blog, please use the search box on top and type “wireless”
什么是循环计时器开关的电路图，使用电位仪表可调节时的计时和计时。
you can try this concept:
//www.addme-blog.com/how-to-make-simple-programmable-timer/
Hi
I assembled the circuit with relayoutput,its working for my application ,thanks for ur help,wish u all the best
听起来很棒，很高兴它对您有用！