electronics guys- come in, delay question for E-fan...
To start with, I know about the DC controller...
Alright, I am going to be setting up my own budget E-fan controller using 3 relays in series, 2 temp probes and a 2spd fan. The first relay will be closed normally but switched open by ignition, the 2nd will be closed normally but switched on by a/c being on or by temperature setting of first temp probe. This will turn low power on E-fan of 3rd relay prong 87a, when temp of 2nd temp probe ( a higher temp than first probe) is met, 3rd relay will switch to prong 87 for high speed fan function. <-- third relay is 5 prong or SPDT.
I know about using diodes on a/c, so that temp probe 1 will not turn a/c on
and using diodes across the coil of each relay and between the + and - of the fan so that the stored energy can bleed back to ground and not damage relays.
Alright that is the plan, my question is- Is there any type of electrical delays I could use, so that when the car is being started, the fans will not turn on, preventing power theft from my starter. ( Power delayed for 5-10 seconds before going to first relay)
I noticed some sort of delay thingy's at a local electronic supply place but was unsure of their function. Keep in mind proper amp rating for my fans.
Sorry for the length and thanks for your help.
To start with, I know about the DC controller...
Alright, I am going to be setting up my own budget E-fan controller using 3 relays in series, 2 temp probes and a 2spd fan. The first relay will be closed normally but switched open by ignition, the 2nd will be closed normally but switched on by a/c being on or by temperature setting of first temp probe. This will turn low power on E-fan of 3rd relay prong 87a, when temp of 2nd temp probe ( a higher temp than first probe) is met, 3rd relay will switch to prong 87 for high speed fan function. <-- third relay is 5 prong or SPDT.
I know about using diodes on a/c, so that temp probe 1 will not turn a/c on
and using diodes across the coil of each relay and between the + and - of the fan so that the stored energy can bleed back to ground and not damage relays.
Alright that is the plan, my question is- Is there any type of electrical delays I could use, so that when the car is being started, the fans will not turn on, preventing power theft from my starter. ( Power delayed for 5-10 seconds before going to first relay)
I noticed some sort of delay thingy's at a local electronic supply place but was unsure of their function. Keep in mind proper amp rating for my fans.
Sorry for the length and thanks for your help.
