The post details a delay OFF adjustable motor controller circuit so that the motor can be assigned a fixed predetermined operating time, or delay OFF time. The idea was requested by Mr. Cribey
技术规格
I really like your website. It is very helpful for so many people.
我试图控制仅在反向方向上（逆时针）上方的36RPM齿轮速度和时间。
In effect I would like to use a 5V USB adaptor plug (like the ones we use for our phones) to power the motor on for a chosen speed and for a chosen amount of time.
速度和时间都必须是可调的（也许是电位计？），以使电动机的确切时间适合电动机，并以正确选择的速度。
任何帮助将非常感激。
Regards,
克里比
The Design
The proposed motor speed controller circuit presented here features an adjustable PWM speed control and an adjustable delay control for the associated motor, which needs to be controlled.
As may be seen in the above diagram, the circuit incorporates two discrete stages, one consisting of the versatile IC 4060 and the other using the work horse IC 555.
基本上这两个都是计时器IC，但是此处IC 555被配置为PWM控制器，其PWM输出可使用相关的5K锅进行调节。
Therefore this stage takes care of the motor speed control and may be set to any desired speed by manually adjusting the 5K pot.
Now as requested, the motor needs to be switched ON only for a particular duration of time, and this is implemented by the 4060 C stage. The delay time which needs to be fixed for enabling the motor to be switched OFF once this elapses is adjusted by the 1M pot associated with pin#10 of the IC 4060 and indicated as P1, the 1uF capacitor also becomes directly responsible for determining the time delay for which the motor may remain switched ON.
打开电源时，IC在电动机上开关，并允许其按照5K锅的调整指定的特定速度操作。
同时，IC 4060同时开始计数，一旦指定的时间跨度段出现，该IC的PUN＃3就会很高，将NPN BC547晶体管触发到传导中。
晶体管将IC555的引脚＃4扎根，从而完全禁用IC 555和MOSFET在其销钉＃3处，以使连接的电动机立即停止。
The diode connected across pin#3 and pin#11 of the IC 4060 makes sure that the above condition stays latched until the power is switched OFF and ON again for initiating a fresh cycle.
上述电路的另一个简单版本如下所示。它使用晶体管延迟离电路而不是IC 4060。
Hello Sir
the 555 pwm section.
Is the PWM adjustment independent of frequency? as I know 555 have issues going below 50% duty cycle.
I am aimimg to get at about 10% duty cycle at about 50hz. Want to to try out some stuffs.
Also can one get a frequency as low as 50hz or even 20hz from the 555 section
Hello Michael, where did you learn this…as far as I know, you can achieve right from 5% to 95% duty cycle control using the circuit that's shown above.
当尝试更多地了解555时，我在网站上阅读了它。
无论如何，我知道它可以配置为低于50％的DC，但我的担心是频率漂移。
anyway I will construct the circuit and test.
if you want to achieve a perfectly isolated PWM, and frequency control, you can try the following design, the first one:
//m.addme-blog.com/2011/12/how-to-build-pure-sine-wave-inverter.html
Hi, You can try the concept presented in the following article, if you have problems let me know, I'll try to help!!
//m.addme-blog.com/2015/06/pwm-motor-soft-start-circuit.html
How could I modify this circuit to run without a set time (stay on until turned off)?
remove IC 4060 stage and connect pin4 of IC 555 with positive.
Ok and the current that the circuit would be able to manage would just depends on the FET's drain source current?
In this case it could manage a motor up to about 20-28amps
yes that's correct!
how does this look?
https://drive.google.com/file/d/0B0N-CQJdWSP0NHFzbTdTR3FmTVk/view?usp=sharing
没关系，但是IC的PIN4/8的两个100欧姆是什么？
不需要您应直接将PIN8/4与正相连接。
R1应该10欧姆，而不是10k
oK got it, it's for dropping the 24V to 12V….in that case you can use two 1K resistors, 100 ohms will simply become hot and burn,
and R2 end should be also connected with pin8/4 and not with 24V
ok like this
https://drive.google.com/file/d/0B0N-CQJdWSP0NHFzbTdTR3FmTVk/view?usp=sharing
现在更好，除了MOSFET GATE 10K，应该是10欧姆…
现在我没有太多的变压器，我只有24V可以构建电压加倍电路，以进一步增加电动机的电压以获得更高的速度。
the transformer is 10amps and the motor is drawing 2.3amps its rated 0-90v.
voltage doubler circuit will not work, you must upgrade the above design to a boost converter instead
this is what I came up with.
https://drive.google.com/file/d/0b0n-cqjdwsp0tlfvbk5lm04040cek/view?usp = sharing
这是电压加倍器而不是增强转换器，增压转换器将需要电感器或反式变压器。
Ok I will work on one, in the mean time I built this circuit today
https://drive.google.com/file/d/0B0N-CQJdWSP0NHFzbTdTR3FmTVk/view?usp=sharing
I used the 10ohm at the gate of the fet but I was only reading 5.2v Dc output.
555中的引脚1和8我只得到10V，我无法在引脚3上读取输出。电压分隔器中的1k电阻之一也很热，不确定为什么我没有得到12V的速度我之所以无法在输出处获得全伏，是因为它可能无法完全打开FET。
结果你都incorrect and could happen only if the IC is faulty.
IC 555与MOSFET一起消耗超过5至10mA，因此电压在电路中任何地方都无法降低电压。
…you can try increasing the 1K to 2k2 and see if that helps to keep the resistor cooler
I was using a logic get when I was getting 5v output, I changed to irfz44n and I got no output which is telling me that the gate voltage isn't high enough and remember i was only getting 10v supply to the 555.
I changed one of the 1k resistors to 1.5k and I got 11v to the 555 I was trying to get 12 to 15v
10V足以触发任何标准的MOSFET，请记住，因为引脚3的形式是DC电压表的频率的形式，而根据占空比的周期，DC电压表的电压比实际的峰值要少得多。
if the duty cycle was 50% then your meter would show 50% of the supply at pin#8/4
now this actually means that pin#3 should indicate less than 6V….if the supply at pin4/8 is 12V
MOSFET的大门也是逻辑大门…
Actually at pin 3 I am not reading any voltage but I know voltage is passing but it activated the gate of the logic Fet but not the regular Fet and if the supply voltage is 10v to pin 8 and 4 then output from pin 3 would be less…. Wouldn't it be 5v or less from pin 3?
pin#3 will give you a peak voltage that's almost equal to the supply voltage, if you are not getting anything at pin#3 then your IC could be faulty, you can recheck it by removing the fet from pin#3 of the IC
尊敬的先生，需要每2小时的左右方向运行3.7 rpm DC电动机（用于孵化器）
亲爱的Vino，您可以使用任何基于IC4060的计时器电路来实现此目的，通过将继电器晶体管驱动器与IC的引脚＃3连接起来。
您可以尝试以下
//m.addme-blog.com/2015/01/reverse-forward-motor-timer-circuit-for.html
Hello,
How could I modify the most simple way this circuit to run with a permanent set time (let stay 5 min. until turned off)?
Thanks.
Hi, I have updated the design at the bottom of the post
Also would be even better if LED would start blinking after 5 min without stop the motor.
Thanks, Boris
Hello,
Thank you so much for your prompt reply and for the diagram. A couple more follow-up questions, please.
1) Based on this schematic, will it provide the most power/torque outputfor our DC motor nominal 9V 2400rpm?
2) How do you calculate the components if we want to delay OFF circuit (for example from 5 min to 10 min)?
Thanks again,
鲍里斯
The torque will depend on the adjustment of the PWM 5K pot. he range will be from 5% to 95%.
通过调整1M电阻和220UF电容器的值来调整延迟CA
Sorry to inject myself here! I need a circuit that delays the max torque to a motor on an esc which is different than the one in this thread. I can’t find where I can post a new request as I can’t find the main comment box!
Thanks Pete
Hello,
On the schematic that you sent me on the right bottom corner above the capacitor terminal 5 100n, what does 1N4148 represent? Why is this added above the 100n?
Thank you
sorry, it is a mistake, please ignore the 1N4148 print