Post by 91xr7 on Sept 8, 2014 10:06:08 GMT -8
Sorry you still don't understand the whole concept of what I am trying to do. I know I'm not the best at discribing things and I'm sorry for that. Also I intially tried to leave automotive aspect out of it in hopes to simplify things. So I'll try again from the beginning and see where it goes?
What I'm trying to build is two timing circuits one that's a delayed on (@5 seconds) and ones that a delayed off (30-45 seconds
The ECU has two outputs that are pulled to Low when activated;
1. Cooling Fan Relay #1
2. Cooling Fan Relay #2
Which I want to turn on three relays that control three different items
1. Cooling fan Relay #1
2. Cooling fan Relay #2
3. Circulation / booster pump relay
* Now when the ECU commands and grounds (switches Low) the cooling fan #1 output I want the cooling fan relay #1 to tunn on along with the circulation / booster pump relay. When the ECU stops commanding and pulls away the low from the Cooling fan #1 I want the Cooling fan #1 relay to disengage but I want the Circulation / booster pump relay to stay triggered for @30-45 seconds then shut off
* Now if the ECU commands and grounds (switches low) the cooling fan #2 output I would like it to delayed by @5 seconds just in case the ECU commands both cooling fan #1 AND #2 at the same time. Resulting in a lower sudden power need from the charging system.
* the ECU does a check on the two output for open circuits and shorted circuits (both to ground (low) and to positive (high)) which will need a resistor across the output wire and positive (vcc?) of about 80-100ohms to allow it to be happy.
I really hope this clears thing up?
Also on the plus side I think I got the resetting feature figured just got to see what it takes to shorten the pulse now!
and for me automotive electrics is easy peasy, electronics not so much
What I'm trying to build is two timing circuits one that's a delayed on (@5 seconds) and ones that a delayed off (30-45 seconds
The ECU has two outputs that are pulled to Low when activated;
1. Cooling Fan Relay #1
2. Cooling Fan Relay #2
Which I want to turn on three relays that control three different items
1. Cooling fan Relay #1
2. Cooling fan Relay #2
3. Circulation / booster pump relay
* Now when the ECU commands and grounds (switches Low) the cooling fan #1 output I want the cooling fan relay #1 to tunn on along with the circulation / booster pump relay. When the ECU stops commanding and pulls away the low from the Cooling fan #1 I want the Cooling fan #1 relay to disengage but I want the Circulation / booster pump relay to stay triggered for @30-45 seconds then shut off
* Now if the ECU commands and grounds (switches low) the cooling fan #2 output I would like it to delayed by @5 seconds just in case the ECU commands both cooling fan #1 AND #2 at the same time. Resulting in a lower sudden power need from the charging system.
* the ECU does a check on the two output for open circuits and shorted circuits (both to ground (low) and to positive (high)) which will need a resistor across the output wire and positive (vcc?) of about 80-100ohms to allow it to be happy.
I really hope this clears thing up?
Also on the plus side I think I got the resetting feature figured just got to see what it takes to shorten the pulse now!
and for me automotive electrics is easy peasy, electronics not so much