Controlling an analog dash
- clanger9
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Re: Controlling an analog dash
With the power on, but the gauge input disconnected, try putting a 1k pull-up resistor between the gauge input terminal and +12v.
Does the gauge then return to zero?
Does the gauge then return to zero?
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Re: Controlling an analog dash
Thanks clanger i will hopefully have a play with that this evening, and see if i get the same result as arber.
I think i need to improve my work bench setup, it's extremely Heath Robinson and not very conducive to good testing
I think i need to improve my work bench setup, it's extremely Heath Robinson and not very conducive to good testing
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Re: Controlling an analog dash
I found an old schematic for my Mazda dial. It worked... I have to find one mosfet to tesxt this here...
See if you can get it to work.
See if you can get it to work.
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Re: Controlling an analog dash
Sorry, this does not appear to work.
My gauge has +12V, GND and sender input, how should i interpret your diagram, should i assume the GND is a given, and connect it that way?
Is Q1 the mosfet?
- clanger9
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Re: Controlling an analog dash
When does the gauge go back down? Only when you disconnect the 12v supply?
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Re: Controlling an analog dash
GND is anywhere on the car i think. But you need 1K pullup for gate to invert signal and resistance toward GND so mosfet will pull signal down and release it in between pulses. What is your dial resistance on full and on empty?Greenbeast wrote: ↑Sun Jan 10, 2021 8:27 pm My gauge has +12V, GND and sender input, how should i interpret your diagram, should i assume the GND is a given, and connect it that way?
Is Q1 the mosfet?
A
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Re: Controlling an analog dash
OK that doesn't mean much to me (I'm a relative novice).arber333 wrote: ↑Sun Jan 10, 2021 10:11 pmGND is anywhere on the car i think. But you need 1K pullup for gate to invert signal and resistance toward GND so mosfet will pull signal down and release it in between pulses. What is your dial resistance on full and on empty?Greenbeast wrote: ↑Sun Jan 10, 2021 8:27 pm My gauge has +12V, GND and sender input, how should i interpret your diagram, should i assume the GND is a given, and connect it that way?
Is Q1 the mosfet?
A
I will check the service manual tomorrow to see if it details that. It shows the sender as 1-5Ohm full 104-117Ohm half full but oddly doesn't show the empty value, unless there's been a misprint (check my post on page 1)
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Re: Controlling an analog dash
Hm... maybe there is damage to its internal circuit. Can you take the dash out and try to use the dial as ammeter? To confirm it still works?
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Re: Controlling an analog dash
What car is this? European cars usualy have value somewhere around 10R(empty) 190R(full); US 240(empty) 30(full).Greenbeast wrote: ↑Sun Jan 10, 2021 10:40 pm OK that doesn't mean much to me (I'm a relative novice).
I will check the service manual tomorrow to see if it details that. It shows the sender as 1-5Ohm full 104-117Ohm half full but oddly doesn't show the empty value, unless there's been a misprint (check my post on page 1)
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Re: Controlling an analog dash
That is entirely possible, i may have been a bit slap dash in my connecting and trying things out. Some of my warning lights don't work either now.
Thankfully this is a spare cluster
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Re: Controlling an analog dash
I have Mazda mx3 and it is in reverse of my EU Peugeot 406.
You should get a reaction if you connect 150R from signal towards GND.
Also verify if there is a fuse in that circuit. Maybe it is blown?
You should get a reaction if you connect 150R from signal towards GND.
Also verify if there is a fuse in that circuit. Maybe it is blown?
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Re: Controlling an analog dash
Ah, the mazda would be likely to match it i guess.
I can't see a fuse on the 'board', so unless it's inside the cluster i don't know.
Didn't have 150R, only a 91R, which did nothing. I need to get a few more components into stock
I can't see a fuse on the 'board', so unless it's inside the cluster i don't know.
Didn't have 150R, only a 91R, which did nothing. I need to get a few more components into stock
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Re: Controlling an analog dash
I tested the resistance across the terminals as suggested by the service manual and it reads higher than it should (70-80R, as opposed to 55R), the temp gauge reads correctly.
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Re: Controlling an analog dash
I just found this thread and I suspect it will be gold dust for me in the future so many thanks to all who have shared here. Very much appreciated.
I need a bigger hammer!
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Re: Controlling an analog dash
I haven't pursued this much recently. Life got in the way. I was trying to set up a better bench rig for it. Breaking out the wires to a set of labelled screw terminals for easy testing, rather than a jumble of wires and loose crocodile clips
- mackoffgrid
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Re: Controlling an analog dash
This is my solution to drive the instrument cluster in my ute conversion.
https://github.com/mackelec/SolarUte/tr ... s/CANio-18
It is all CAN bus driven - stm32Duino. It will drive the Temperature and Fuel gauges, various dash lights. The tacho is PWM driven (specific to the B2500 ute).
https://github.com/mackelec/SolarUte/tr ... s/CANio-18
It is all CAN bus driven - stm32Duino. It will drive the Temperature and Fuel gauges, various dash lights. The tacho is PWM driven (specific to the B2500 ute).
https://github.com/mackelec/SolarUte
meFDCAN Arduino Library 3 FDCAN port stm32G4xx
meCAN Arduino Library 2023 version 2/3 CAN port stm32F0xx, stm32F1xx, stm32F4xx, stm32L4xx
meFDCAN Arduino Library 3 FDCAN port stm32G4xx
meCAN Arduino Library 2023 version 2/3 CAN port stm32F0xx, stm32F1xx, stm32F4xx, stm32L4xx
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Re: Controlling an analog dash
Wow that looks cool! Thanks
Do you have any video content of this in situ working
Do you have any video content of this in situ working
- mackoffgrid
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Re: Controlling an analog dash
Thanks.
I've not done any videos - Never mind Cecil B Demille, I'm no Damian when it comes to video making
I'll see what I can do.
We're pretty slow in our project and while I made this board some time ago it's only now about to go into the car .
I've not done any videos - Never mind Cecil B Demille, I'm no Damian when it comes to video making
I'll see what I can do.
We're pretty slow in our project and while I made this board some time ago it's only now about to go into the car .
https://github.com/mackelec/SolarUte
meFDCAN Arduino Library 3 FDCAN port stm32G4xx
meCAN Arduino Library 2023 version 2/3 CAN port stm32F0xx, stm32F1xx, stm32F4xx, stm32L4xx
meFDCAN Arduino Library 3 FDCAN port stm32G4xx
meCAN Arduino Library 2023 version 2/3 CAN port stm32F0xx, stm32F1xx, stm32F4xx, stm32L4xx
- clanger9
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Re: Controlling an analog dash
My mind is blown by JLCPCB.
Literally: I just load those files in, click "SMT assembly", pay around $70 and I get 5x assembled boards in the post a few days later?
Is it really that simple?? That is incredible.
Literally: I just load those files in, click "SMT assembly", pay around $70 and I get 5x assembled boards in the post a few days later?
Is it really that simple?? That is incredible.
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Re: Controlling an analog dash
Does seem pretty cool.
I dare say i might take one off your hands at some point in the future
I dare say i might take one off your hands at some point in the future
- mackoffgrid
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Re: Controlling an analog dash
I've been designing and drawing PCB's since crepe tape days JLCPCB is truly remarkable from my perceptive.
I am now using their CAD, design a board, press a few buttons and a week later a man in a yellow van gives me assembled PCBs - Fantastic.
With some luck, Star Trek is our future !!!
https://github.com/mackelec/SolarUte
meFDCAN Arduino Library 3 FDCAN port stm32G4xx
meCAN Arduino Library 2023 version 2/3 CAN port stm32F0xx, stm32F1xx, stm32F4xx, stm32L4xx
meFDCAN Arduino Library 3 FDCAN port stm32G4xx
meCAN Arduino Library 2023 version 2/3 CAN port stm32F0xx, stm32F1xx, stm32F4xx, stm32L4xx
- clanger9
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Re: Controlling an analog dash
Yep, last time I made a board it was paper tape, dunked in ferric chloride then hand-drilled. I had no idea that SMT boards were accessible to mere mortals. This changes *everything*