I know that one is incorporated into The Hook: generates signal voltage between 0-5v dc in .5 volt increments. I am also aware that Blue Point provides a stand alone version. Both are pretty expensive options. Is there anything more affordable out there?
5v reference signal generator
- Thread starter MrNatural
- Start date
Carguy99
Well-known member
Build one. Google 5 volt regulator... easy project
Professional Tool User
Well-known member
There are 5 volt adapters that you can plug onto other power probe products. Otherwise, there's the DIY route if you are any good at soldering. I don't see how 4 AAA batteries hooked up in series, a potentiometer with a knob that cannot be turned up to more than 5 volts, and a probe can't be soldered into a improvised solution.
What type of signal? Do you just need a voltage or does it need to be pwm or something?
If cheap is all you need get a 9v battery and an adjustable voltage converter. You just need a screwdriver and multimeter to adjust the voltage.
Beyond that, really basic signal generators can be had for $20-30.
If cheap is all you need get a 9v battery and an adjustable voltage converter. You just need a screwdriver and multimeter to adjust the voltage.
Beyond that, really basic signal generators can be had for $20-30.
plinker
Well-known member
Power probe has a 5v adapter to go with the Power probe 3, around 20$ for the adapter IIRC.
I like the thinking and a diy rheostat/battery solution would provide more sensitivity than the commercial.5v incremental step option.
Need to test this sensor by substituting two precise dc ( non pwm ) Voltage’s.
Will leave the 5v supply and return connected to the ecu and cut the return to which I will attach the diy voltage generator. Ecu expects to see .5v pre crank then between 2.2-3v depending on rpm’s. At 3.2 v the ecu closes a pressure regulator and the engine will not start. I have checked the cranking voltage and it is immediately at 3.2v so that indicates a no start due to FPS failure, but the replacement part is hard to source and expensive, hence wanting to bypass for conformation purposes.
http://www.f5r.co.uk/home/czujnik-cisnienia
Need to test this sensor by substituting two precise dc ( non pwm ) Voltage’s.
Will leave the 5v supply and return connected to the ecu and cut the return to which I will attach the diy voltage generator. Ecu expects to see .5v pre crank then between 2.2-3v depending on rpm’s. At 3.2 v the ecu closes a pressure regulator and the engine will not start. I have checked the cranking voltage and it is immediately at 3.2v so that indicates a no start due to FPS failure, but the replacement part is hard to source and expensive, hence wanting to bypass for conformation purposes.
http://www.f5r.co.uk/home/czujnik-cisnienia
I am now thinking in regard to this particular sensor. As the ECU expect to see between 2.2 and 3v dc in order to pulse the injectors,but not more than 3.2 V in which case it shuts off the fuel supply: could I not just wire 2 AAA rechargeable batteries in series giving 2.5v? Is there a problem with that logic just for testing this particular sensor?
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batteries is an option but could have variables on how well works in practice .
If you already have the 5V reference on vehicle you just tap that and use potentiometer trim voltage value and feed that to your test procedure .
A 12v to 5v regulator is few bucks off eBay, add in a potentiometer or source regulator with onboard adjustment and you got a very useful sensor 0 to 5V voltage test tool for like 5 bucks .
I been using these solutions and resistors for diagnosis for years and it works great and is available and cost effective for everyone ...
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RPH
Well-known member
Thank you all once again for your valuable experience. I just really appreciate the wisdom gained through experience and then most generously passed on to others.
It would be nice to try the simple elegance of a simple pragmatic approach. I really like, and may yet try for fun the very affordable self-constructed tester in a box solution, but the Utronics at 27 dollars seems to tick all the boxes for testing by substituting a proven signal voltage, for many sensors on a 5v reference circuit.
It’s accurate, very adjustable, and takes a rechargeable battery. If it also has the facility to lock voltage generated at a preset maximum level for safety (4.5 v dc ) which I think it can do reading the Amazon comments, then it looks pretty damn perfect for the task.
Thanks again to everyone for sharing your valuable knowledge. ��
It would be nice to try the simple elegance of a simple pragmatic approach. I really like, and may yet try for fun the very affordable self-constructed tester in a box solution, but the Utronics at 27 dollars seems to tick all the boxes for testing by substituting a proven signal voltage, for many sensors on a 5v reference circuit.
It’s accurate, very adjustable, and takes a rechargeable battery. If it also has the facility to lock voltage generated at a preset maximum level for safety (4.5 v dc ) which I think it can do reading the Amazon comments, then it looks pretty damn perfect for the task.
Thanks again to everyone for sharing your valuable knowledge. ��
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