george_tlc
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    • george_tlc
      george_tlc replied to the thread Some pics from a trade event.
      and a few more...
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    • george_tlc
      george_tlc replied to the thread Some pics from a trade event.
      More...
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    • george_tlc
      Older son was at a toyota event for the trade - for companies building after market stuff. Pics are 'cleared' for sharing. He sent some to me, so posting them up for you guys that are hot to trot to buy one. cheers, george.
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    • george_tlc
      george_tlc replied to the thread Solving parasitic draw.
      Not quite right :) A zener has a break down voltage. It will break down (reverse biased) and conduct when you reach that voltage (it's not instant on/off...). Typically there would be a resistor in series to limit current and the voltage across...
    • george_tlc
      george_tlc reacted to Mark W's post in the thread Solving parasitic draw with Haha Haha.
      I will! Electronics are one step away from black magic... eye of newt and salamander tail so far as I am concerned. :doh: But it never hurts to try and understand it better. :) Mark...
    • george_tlc
      george_tlc replied to the thread Solving parasitic draw.
      It's not actually quite like that... The capacitor is used as part of the timing, the transistor (and leaking zener) are what control power to the ring. Read my write up in the link further up and it explains a little about the circuit and the...
    • george_tlc
      george_tlc replied to the thread Solving parasitic draw.
      https://george4wd.taskled.com/ignition_bulb.html Ignition ring... cheers, george.
    • george_tlc
      He is an electrical engineer. That may have something to do with it. Or, maybe he feels lucky. :)
    • george_tlc
      lifepo4 is a 'safe' chemistry versus li-ion. It will not 'catch fire'. The battery also has a BMS to protect from charging when the battery is too cold or too hot. The battery is operationally safe to 55C. I've never seen 60C in the front/battery...
    • george_tlc
      Thanks for your concern, but the lifepo4 will be just fine in the battery case in the front area of the engine bay and so will the charger PETG is fine for this application. Cheers, George.
    • george_tlc
      Well, a bunch of weekends and planning. Re-doing my dual battery setup to use a lifepo4 as the aux and that has entailed a bunch of planning and rethinking my existing solenoid based system (that has/had been working for the past 20+ years). The...
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    • george_tlc
      ^ you have to look closely at say an 80 series (others are similar) and you will find there are NO ground straps to the chassis. It is not part of the ground circuit in any way. The 80 (as the example) has a big ground connection from battery to...
    • george_tlc
      george_tlc replied to the thread Winch cover, yes or no?.
      My home made cover, scrap marine vinyl, sewing machine, bit of time. > 20yrs old and 80 lives outdoors. cheers, george.
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    • george_tlc
      george_tlc replied to the thread Winch cover, yes or no?.
      I've run hand made covers (I'm cheap...) on both my 80 (m12000) and my oz patrol (8274) for a couple of decades. Used some scrap marine grade vinyl material. The 80 lives outside (norcal) and patrol in a garage. The winches look pretty well new...
    • george_tlc
      You can go to Lexus Parts Now and plug in your vehicle model then search Tube Brake and find the tube you're looking for. Most but not all parts for the 97 FZJ80 are the same as the LX450 with a few exceptions (HVAC, some interior and body parts...
    • george_tlc
      I'm sure there's a limit, don't know offhand what it is. Something to verify in the product's documention/spec. Fancier units that gave scpi may have pretty fancy capabilities... cheers, george.
    • george_tlc
      1 second was just an example. The fastest is 0.1 sec per change :) cheers, george.
    • george_tlc
      You can program steps in the various modes. Below shows Constant Resistance and changing the resistance values every second. It will log current, voltage, power etc so you can get curves. You can save the data and then pull it into excel for...
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    • george_tlc
      I have and use a Manyuo electronic load. It's well proven and there's a few similar units out there. Fairly old school in terms on 'UI', but it works just fine. I've used for a bunch of years. Mostly as an electronic load for LED driver testing...
    • george_tlc
      ^ Agreed, misinformation in a thread that people will refer to is not a good thing. Landlocked93 clearly doesn't understand the distinction between a poor ground path and an ENGINEERED one by Toyota etc. He doesent understand how the body mounts...
    • george_tlc
      If self jump-starting is on the menu then the current usage isn't any different. You talk about not having ground loops and then you suggest using both the body and the frame as parallel ground paths. That's a ground loop in my experience. It...
    • george_tlc
      Sorry, but no. The frame is not a ground path. It may connect to the ground system via bearings, springs etc, but it is NOT intended to carry current. Again, there is no point where Toyota uses the frame to carry current. Current is carried from...
    • george_tlc
      Yes, and tailshaft and bearings to axle etc. The point is that ground is via engine and body. Frame/chassis may have indirect grounding, but is not used as a ground path. I've got a pretty good grasp of ground loops - my EE work ensures I...
    • george_tlc
      ^ Yes, manifold/engine/body etc. NOT the frame/chassis. Manifold is 'part' of the engine - it's bolted to it as is the exhaust system. Essentially the entire engine/transmission/transfer box/body are suspended on rubber from the frame/chassis...
    • george_tlc
      ^ The alternator and starter are grounded to the engine block. The ground straps from the block go to the body. The battery grounds (2 of them), one thick goes to the engine block - that is THE high current ground for the alternator and the...
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