The GOODbox
#501
I was actually looking into getting one of these for water temp monitoring. Is this just as effective as say an aftermarket gauge? I don't know how the temperature is received but I'm assuming from the ECU and I'm wondering how it's all wired up.
#503
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Okay... connecting oil temp and pressure sensors to the GoodBox analog aux ports...
Pressure is easy. Plenty of transducers output 0-5V.
Temperature is where it gets weird... Pretty much all sensors are going to work on resistance.
So, is a voltage divider the best option for this?
Pressure is easy. Plenty of transducers output 0-5V.
Temperature is where it gets weird... Pretty much all sensors are going to work on resistance.
So, is a voltage divider the best option for this?
#504
Registered
Yes, a voltage divider would work if you feed it a 5V reference. Most universal single-wire sensors are grounded through the mounting thread, so it will be the 'bottom' part of the divider.
But what value of resistor you pair the temp sensor with would depend on the resistance the sensor offers through its temperature range. You wouldn't want to end up with full temperature swing only giving a very small voltage swing, as that wouldn't be very useful and have terrible resolution and accuracy.
What temp sensor did you have in mind? Ideally, they will give resistance specifications over temp range. Or, if unknown, you could measure it yourself by doing as others have done and boiling it in a pan of water while measuring with a multimeter.
But what value of resistor you pair the temp sensor with would depend on the resistance the sensor offers through its temperature range. You wouldn't want to end up with full temperature swing only giving a very small voltage swing, as that wouldn't be very useful and have terrible resolution and accuracy.
What temp sensor did you have in mind? Ideally, they will give resistance specifications over temp range. Or, if unknown, you could measure it yourself by doing as others have done and boiling it in a pan of water while measuring with a multimeter.
Last edited by HwAoRrDk; 02-10-2018 at 03:50 PM.
#505
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Thanks for confirming what I've been reading.
Before I torture myself learning any more about electronics, I'm going to try using this and a K-type thermocouple and see if I get enough resolution.
The range from 0°C - 130°C is 1.25V - 1.9V. It's not great but it should be serviceable enough. If not, maybe I can learn how to proportionally double the voltage output.
Before I torture myself learning any more about electronics, I'm going to try using this and a K-type thermocouple and see if I get enough resolution.
The range from 0°C - 130°C is 1.25V - 1.9V. It's not great but it should be serviceable enough. If not, maybe I can learn how to proportionally double the voltage output.
Last edited by NotAPreppie; 02-10-2018 at 05:52 PM.
#506
Registered
I wouldn't use a thermocouple. For a start, that output voltage range is the kind of range I was talking about that will give you poor resolution and accuracy. You'll be lucky if the GOODbox can show that to 1°C increments. It has a 10-bit ADC which only gives you 1024 value increments and you'd be using just over a fifth of that range.
Also, how would you plan to mount the thermocouple? Off-the-shelf temp sensors obviously have a threaded mounting, but thermocouples are just blobs on the end of a wire.
If you're gonna spend $30+ on stuff for a thermocouple ($14 for the AD8495 breakout board and $16 for the K-type thermocouple), why not go for the 'Fluid Temperature Sensor Kit' for $45 from these guys:
Aeroforce Technology Inc | Products - Sensors
You get a proper sensor (in 3/8" or 1/8" NPT) as well as a 5V reference supply. It's what I have on my car (plus one of their oil pressure sensors) with my GOODbox. Works great, no problems at all for many years.
Also, how would you plan to mount the thermocouple? Off-the-shelf temp sensors obviously have a threaded mounting, but thermocouples are just blobs on the end of a wire.
If you're gonna spend $30+ on stuff for a thermocouple ($14 for the AD8495 breakout board and $16 for the K-type thermocouple), why not go for the 'Fluid Temperature Sensor Kit' for $45 from these guys:
Aeroforce Technology Inc | Products - Sensors
You get a proper sensor (in 3/8" or 1/8" NPT) as well as a 5V reference supply. It's what I have on my car (plus one of their oil pressure sensors) with my GOODbox. Works great, no problems at all for many years.
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Nuke It (01-12-2021)
#507
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I ordered this off of Amazon.
I plan on using it with this:
https://www.rx8performance.com/produ...or-banjo-bolts
I'm not overly concerned with high precision. Mostly I'm looking for a general health indicator.
I plan on using it with this:
https://www.rx8performance.com/produ...or-banjo-bolts
I'm not overly concerned with high precision. Mostly I'm looking for a general health indicator.
#509
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I don't have the answers to your question but here's the link to the page:
GoodBox Gauge RX8 | GOODbox Gauges
You could ask them.
GoodBox Gauge RX8 | GOODbox Gauges
You could ask them.
#520
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NotAPreppie (02-24-2018)
#521
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I received an e-mail reply from Mike at 12:31 AM:
I replied asking for an ETA but haven't heard back.
Originally Posted by Mike
Hi Jason--
Apologies, but we're currently backordered and don't have any stock with which to fulfill your order. If the order was paid I can arrange a refund for you.
Thanks,
Mike
Apologies, but we're currently backordered and don't have any stock with which to fulfill your order. If the order was paid I can arrange a refund for you.
Thanks,
Mike
#524
RIP Furai
iTrader: (3)
I think this is just a guy doing these in the side, so I tried to give him some slack on the communication times, etc. He did email me a few times explaining how he moved and the old batch was lost and it's too expensive to make up more boards without any preorders. Maybe with enough interest here he'll make another batch.
#525
100% baller (finally!)
iTrader: (7)
Hey guys,
I'm still here and everything mentioned above is correct.
1. We don't have stock (it's been misplaced and I haven't found it yet)
2. In order to build more, I need to reach a minimum order quantity which right now is 50pcs
3. I'm keeping a list of folks who are interested so I can communicate when we get closer to a new batch (or when I find the ones we have)
4. This is not my primary concern; we're now focused on selling our turn key REW swap kits for the 8
5. I'll be slow on email but will respond when I get a chance
6. I'm watching this thread
Thanks!
I'm still here and everything mentioned above is correct.
1. We don't have stock (it's been misplaced and I haven't found it yet)
2. In order to build more, I need to reach a minimum order quantity which right now is 50pcs
3. I'm keeping a list of folks who are interested so I can communicate when we get closer to a new batch (or when I find the ones we have)
4. This is not my primary concern; we're now focused on selling our turn key REW swap kits for the 8
5. I'll be slow on email but will respond when I get a chance
6. I'm watching this thread
Thanks!