TIMER TON

Details

GERBER PCB

https://mega.nz/file/GdgWVbAR#t_qmgW546Oz4834_myRtPEgB19KCzrqy1DodzjxI4sA

DATASHEET NE555

https://mega.nz/file/aMJFzKCL#OPWVYu6sYgewD9sZpiSLyDCQ3EUIAd9BE4ngBr3sBnY

DATASHEET C106DG SCR

https://mega.nz/file/TN5RRK5J#LuROspQhA5OpTO6GbCLjuvHn70rFaZUFlkAKdgf7k1Y

DATASHEET LM2576

https://mega.nz/file/nQQGSTyY#6LNVz3kkNpO9UGndeycgyeO_x82Bwh-z7tKnYJq5FjA

In this case we will make a control circuit using basic electronic components such as optocouplers, SCRs, transistors, resistors, etc., which will allow us to control effective timing.

The main brain of our circuit is the SCR that we will use as an interlock, this will allow us to activate the SCR and the timer that will start its delay count to be able to turn on. In this project we use the two functions when the timer is turned on, the first relay is activated until counting the established time, then the first relay will be turned off and the second relay will be activated and will remain there indefinitely until I turn off the system or disconnect the input power.

This circuit works with a VIN of 24VDC.

It consumes little current in the control system.

After this process we can activate a three-phase contactor, this would already be seen in the power system, that is, in the three-phase motor to be controlled and thus we can control motors with a high load capacity.

Electronic components

· 3 TIP31C

· 2 SCR C106MG

· 4 PC817(OPTOCOUPLERS)

· 4 LEDs 5MM

· 1 IC NE555

· 1 POT 500K

· 2 RELAYS 24VDC 3 WAYS

· 3 RESISTOR 1K 1/2W

· 4 RESISTORS 10K 1/2W

· 3 RESISTORS 100K 1/2W

· 2 RESISTORS 20K 1/2W