Many times we have a hard time making circuits without the data sheet of a main component. This is the case of a 555, we know that with this device we can carry out many applications, pulse generators, delay generators, etc. But what would happen if I wanted to make a disconnection time delay circuit with a single pulse? Let's put ourselves in the case that one day we don't have this integrated. Well, in this video we will learn how to make the turn-off time circuit with a single pulse, just with a few resistors and a capacitor without using the 555 or another similar component, in addition, we will be able to regulate the duration of the turn-on time after having pressed a button.
The Off-Delay Timer (TOF) is used to delay the turning OFF of an output for a specified period of time after an input has been turned OFF.
When the enable input turns ON, the timing bit turns ON immediately and the present value is cleared to 0.
When the input turns OFF, the timer counts until the elapsed time reaches the preset value. Once this is reached, the timing bit is turned OFF and the current value stops counting.
If the input is deactivated (OFF) for a time less than the preset value, the timing bit remains activated (ON). A change from ON to OFF must occur for the TOF operation to begin counting.
If a TOF timer is inside an SCR section and the SCR is off, the present value is set to 0, the timing bit is turned OFF, and the present value does not count.
Many times we have a hard time making circuits without the data sheet of a main component. This is the case of a 555, we know that with this device we can carry out many applications, pulse generators, delay generators, etc. But what would happen if I wanted to make a disconnection time delay circuit with a single pulse? Let's put ourselves in the case that one day we don't have this integrated. Well, in this video we will learn how to make the turn-off time circuit with a single pulse, just with a few resistors and a capacitor without using the 555 or another similar component, in addition, we will be able to regulate the duration of the turn-on time after having pressed a button.
The Off-Delay Timer (TOF) is used to delay the turning OFF of an output for a specified period of time after an input has been turned OFF.
When the enable input turns ON, the timing bit turns ON immediately and the present value is cleared to 0.
When the input turns OFF, the timer counts until the elapsed time reaches the preset value. Once this is reached, the timing bit is turned OFF and the current value stops counting.
If the input is deactivated (OFF) for a time less than the preset value, the timing bit remains activated (ON). A change from ON to OFF must occur for the TOF operation to begin counting.
If a TOF timer is inside an SCR section and the SCR is off, the present value is set to 0, the timing bit is turned OFF, and the present value does not count.
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