Recent content by HomerDodd

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    Timer circuit

    I have slowed it with a valve, but then the volume is too low to make a difference. I need to regulate output, that is the goal here.
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    Timer circuit

    Wrong. The longer the water stays in the heater grid hoses the hotter it becomes. I've measured it at several intervals, it gets over 115 degrees on a hot day after not flowing for about 8-10 minutes, it will scald my hand after sitting in those black, coiled and hot grids. Now once again, can...
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    Timer circuit

    That would work too. Once e temperature is reached the valve opens, allowing the hot water into the pool. THanks! How do I build it?
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    Timer circuit

    If you can't answer my requests, please just don't respond. Your question if childish and stupid. BTW, I fixed the Cadillac in question as I needed and sold it.
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    Timer circuit

    I made a solar pool heater, but want to regulate the outlet flow. If it just flows unregulated, the water does not get warm enough.It needs more time in the sun before going into the pool. I want to install a sprinkler valve controlled by a timer circuit that will open at 3, 4 or 5 minute...
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    Reducing battery charger output

    Thanks. I flushed the battery with hot distilled water. I could not see any obvious plate sulfation. Then refilled with Epsom salt and distilled water, which is homemade electrolyte. It's base voltage was only about 9 volts, which is very low discharged. I then put the charger and lightbulb...
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    Reducing battery charger output

    The battery drained slowly over the past few months of the motorcycle not being run on the winter. It is actually quote common. I am buying a Battery Tender to keep it charged during the off season. I am going to use my car charger, with a 12v lamp in series between the positive charge cable and...
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    Reducing battery charger output

    Good afternoon. I have a standard car battery charger, which when set on the lowest setting outputs 12Volts and 2amps, which is great for slow charging larger car batteries. However, I also have a much smaller motorcycle battery which will literally get warm or hot if charged with 2 amps or...
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    Oscillator simple circuit as dummy supply

    Yes. I have the P056 code. I can clear it with the onboard diagnostics, however, it returns after driving only a few hundred feet. The sensor is $20, but over $2,000 in labor to remove the engine and trans and change the sensor. It is simply a permanent magnet two wire (passive, not active)...
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    Oscillator simple circuit as dummy supply

    Some of my previous posts described a problem with my older Cadillac. There is a permanent magnetic two-wire sensor buried deep in the transmission. I generates an AC signal, and I think, a sine wave. Minimum required output spec's to the cars computer (ECM) are 5.5 VAC and 540 Hz, when...
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    Op Amp with a/c output

    After test driving and measuring, we are close. I am beginning to think the ECM (cars computer) is more concerned with frequency, as I have achieved the voltage amplification with the recommendations by you guys. I am now wondering if it is a better option to complete eliminate the sensor itself...
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    Op Amp with a/c output

    Again, thanks for everything Alec. Hey, just a thought. You think it would be possible to just completely forget the sensor, and simply build and independent DC powered sine wave generator instead ? They look very easy to assembly, and obtaining frequency seems as easy as changes the RC make up...
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    Op Amp with a/c output

    Update: the attached picture, with notes in it, worked for the voltage. Output is now between 5.5 and 6.5 VAC. However, the check engine light came back on. I then measured the frequency. This may be the culprit. it only measured 200-300 Hz. I think the computer needs a minimum of 530 Hz. Any...
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    Op Amp with a/c output

    I have assembled small circuit boards before, I'm OK with it. I'm thinking the cars computer needs an ac sine wave with a minimum of 500hz. I have made one amp that was recommended, and I achieved the voltage. However, the Check Engine light stays on. I'm thinking it is more of a frequency issue...
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    Op Amp with a/c output

    My older multimeter actually measures frequency, but does not tell me if sine, square or triangle wave. I will check frequency today. The other Cadillac guys said in a very old post that a known good sensor was measuring approx. 530 Hz at idle speed and rising with speed increases. It stands to...
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