Solid-State DME Relay- Beta Testers Wanted
#16
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I didn't realize the heater fan resistor module was an issue. What happens to that thing?
#17
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I am hesitant to throw a price out there. Volume has a huge impact on that and I simply don't have an idea how many I will sell at this point. That said, I don't think it is going to be too pricey for what it is even in low volumes. But if your expecting it to compete with cheap relays on eBay and Amazon you are going to be disappointed.
#18
If you want to go OE you can get the OEM Stribel Relay for $38.
But I'd guess the only difference between that and the cheap relay is the printing on the case. Assuming the picture is correct, that relay is also Made in Hungary.
#20
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If you want to go OE you can get the OEM Stribel Relay for $38.
But I'd guess the only difference between that and the cheap relay is the printing on the case. Assuming the picture is correct, that relay is also Made in Hungary.
But I'd guess the only difference between that and the cheap relay is the printing on the case. Assuming the picture is correct, that relay is also Made in Hungary.
#21
Three Wheelin'
interesting. subscribed to see what happens. GLHF!
#22
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Honestly, solid state designs being what they are (well, that is when they're not cheap Chinese made crap), the OP could own the market for these things the world over. Of course yes, testing and refinement must be done first
#24
I live in the Phoenix area and would be willing to beta test. Unfortunately my car is not daily driven though.
The fuel pump feature has me very interested. Also the fan relay sounds good. Hope this becomes available.
The fuel pump feature has me very interested. Also the fan relay sounds good. Hope this becomes available.
#25
Nordschleife Master
I have thought about replaceing the fan relay(s) with a Solid-State solution that would let me PWM the fans to any speed. Then the two ceramic "Puck" resistors could be removed entirely.
I didn't realize the heater fan resistor module was an issue. What happens to that thing?
I didn't realize the heater fan resistor module was an issue. What happens to that thing?
On the heater fan module it's the mechanical contacts that cause problems. They get dirty and corroded causing a voltage drop affecting fan speed and eventually the only fan speed you can get is full.
#26
Rennlist Member
The internal component quality on relays are a crapshoot. If you open a URO relay, the family dog could be trained to make better solder joints than what you'll see in there.
Re: PWM control on fans
In college, my design team used a 944 fan motor for a project and used a TIP120 + PWM to control it at 12v. It sucked 7A at steady state (IIRC, and more than a dozen when transient) and we friend a lot of transistors trying to get it down. We ended up needing a really big heat sink if I recall.
What about making a standalone "relay" that mounts in a well ventilated area?
Re: PWM control on fans
In college, my design team used a 944 fan motor for a project and used a TIP120 + PWM to control it at 12v. It sucked 7A at steady state (IIRC, and more than a dozen when transient) and we friend a lot of transistors trying to get it down. We ended up needing a really big heat sink if I recall.
What about making a standalone "relay" that mounts in a well ventilated area?
#27
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The internal component quality on relays are a crapshoot. If you open a URO relay, the family dog could be trained to make better solder joints than what you'll see in there.
Re: PWM control on fans
In college, my design team used a 944 fan motor for a project and used a TIP120 + PWM to control it at 12v. It sucked 7A at steady state (IIRC, and more than a dozen when transient) and we friend a lot of transistors trying to get it down. We ended up needing a really big heat sink if I recall.
What about making a standalone "relay" that mounts in a well ventilated area?
Re: PWM control on fans
In college, my design team used a 944 fan motor for a project and used a TIP120 + PWM to control it at 12v. It sucked 7A at steady state (IIRC, and more than a dozen when transient) and we friend a lot of transistors trying to get it down. We ended up needing a really big heat sink if I recall.
What about making a standalone "relay" that mounts in a well ventilated area?
#29
Three Wheelin'
This sounds like a most fantastic idea! I'm definitely in for something that keeps reliability up and keeps a 30+ year old car going! Even for more money, if you're not having to replace crappy ones every so often, it's a good thing!