what do i need to make a motor timer/controller?

[kak111]

Looks ok.

Transistor is protected against inductive transient in relay with diode.
But I meant , how to protect relay switch contacts against transients and electric arc.

Have you ever mentioned , which electric sizes are the used motors.
Voltage 12Vdc ,but max. current or power / one motor.

What kind of power source you are thinking to use supply this system.

 

[samo]

Looks ok.

Transistor is protected against inductive transient in relay with diode.
But I meant , how to protect relay switch contacts against transients and electric arc.

Have you ever mentioned , which electric sizes are the used motors.
Voltage 12Vdc ,but max. current or power / one motor.

What kind of power source you are thinking to use supply this system.

the motors are the same as these ones-
**broken link removed**

 

[erikl]

but is the 4017 more versatile than the 4022 in that if i want to cut the 4022 down to 6 relays does it allow it or just 8?

With the same trick as shown for the 4017 this is also possible with the 4022. You can't go beyond 8, however, with the 4022 .

 

[samo]

perfect i was hoping that was possible.

i was thinking of using 12vdc DPST reed relays as i have lots of these and it suits my need of completely disconnecting power from the motor as im planning to make two of these circuits one for sending the motors one direction and one to send it back for the same distance/time in the other direction.
so a push of a button on one circuit it will do the sequence one way until stop then a push of the button on the other circuit will reverse the whole procedure.

see any problems with this?

 

[erikl]

so if it were possible to make it stop at the end of the sequence then there would also be no need for the stop/run switch as then just the reset would be needed?

Right!

how could i go about this flip flop thing?

You'll need the space for one or two more ICs.
Give me a few hours, perhaps one day, if you want this.

I think the most simple solution is to use a SET/RESET/ latch made from two 2-input Schmitt NANDs :

 

[samo]

didnt realise it take two more chips to do that.

these chips-
**broken link removed**

i would need help with the pin numbers on these chips as i cant see them on the diagram.

You'll need the space for one or two more ICs.
Give me a few hours, perhaps one day, if you want this.

perfect if you cant help out.

thanks

 

[erikl]

didnt realise it take two more chips to do that.

these chips-
**broken link removed**

You need only one 4093B. Each of these ICs contains 4 Schmitt NANDs, of which you only need two (i.e. you use only one half of the IC !).

i would need help with the pin numbers on these chips as i cant see them on the diagram.

Here you can get the 4093B dataSheet. You should be able to find the proper pin numbers. If you aren't sure, post your suggestion!

 

[samo]

here is my latest attempt at the circuitry i need.
corrections, comments and pleasantries please :smile:

 

[erikl]

corrections, comments and pleasantries please :smile:

Here they come: Congratulations, not too bad at all ;-)
However, I've added some amendments (A), changes (C), and recommendations (R) :

• (C) power supply
• (A) extra push button for "stop" Sw2
• (C) Sw1 designation from "Toggle Switch" to "Push Button"
• (R) R4..11 = 1kΩ
• (R) R12, R13 can be omitted (≘ 0Ω)
• (R) R5 (after D1) = 100Ω (lowest power rating) instead of 10Ω / 2W
• (C) D1 & D2..9 type designations exchanged

For the automatic stop of the second sequence (opposite direction) you need a second start/stop circuit (identical to the first one), for which you'd use the other two gates from IC3.

You cannot use output "0", as it will be set active by the reset. So if you want to control 8 motors, you must revert to the 4017 IC .

In order to avoid immediate simultaneous run of both sequences, you must press and hold both "stop" buttons during power up.