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PM128: JAMECO VALUEPRO: LCD Products
Vance Harlow Oxygen Hacker's Companion Airspeed Press page 113->
Electronics help... esp with a diode.
- Thread starter The Chairman
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PM128: JAMECO VALUEPRO: LCD Products
Vance Harlow Oxygen Hacker's Companion Airspeed Press page 113->
ianr33
Contributor
Or just toss it and buy a new one EL Cheapo II Analyzer Kit : OxyCheq - DiveOps, Analyzers and Scuba Diving Equipment (not as much fun though! )
OP
The Chairman
Chairman of the Board
Here are some pics:
Which analyzer works perfectly until you put it in the housing? The original one you refurbed?
If so, I would check to see if putting it in the housing is causing a short/open due to physical contact. May be a bad wire somewhere or a loose joint you missed.
Also, are you sure the trace you shorted is supposed to be connected?
Edit: what lowvis said
---------- Post added January 3rd, 2014 at 10:43 PM ----------
Oh, in case you were wondering and didn't know, the display panel simply takes a voltage and displays a number in response. The panel I have also has some jumpers you can use to set the decimal position.
The pot is used to adjust the voltage from the O2 sensor going to the panel input for calibration purposes.
The panel itself should have some kind of chip running it, probably under the black patch on the PCB.
If so, I would check to see if putting it in the housing is causing a short/open due to physical contact. May be a bad wire somewhere or a loose joint you missed.
Also, are you sure the trace you shorted is supposed to be connected?
Edit: what lowvis said
---------- Post added January 3rd, 2014 at 10:43 PM ----------
Oh, in case you were wondering and didn't know, the display panel simply takes a voltage and displays a number in response. The panel I have also has some jumpers you can use to set the decimal position.
The pot is used to adjust the voltage from the O2 sensor going to the panel input for calibration purposes.
The panel itself should have some kind of chip running it, probably under the black patch on the PCB.
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This looks like your panel meter: http://www.farnell.com/datasheets/82403.pdf
Can you post any assembly directions that you are following? A circuit schematic would be ideal, but I'm guessing you don't have one since you are asking about the type of diode. One or two things about the breadboard wiring seem odd.
Can you post any assembly directions that you are following? A circuit schematic would be ideal, but I'm guessing you don't have one since you are asking about the type of diode. One or two things about the breadboard wiring seem odd.
OP
The Chairman
Chairman of the Board
Excellent find on the panel meter info.
Another possibility with your problem; when you assemble it it stops working,, could be a broken or cracked foil trace on the board or in one of the other components. Make sure nothing is being stressed or twisted upon assembly. Good luck.
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