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This one is simple and cheap, Hobo has data loggers with external inputs (0 to 5 volts) with time stamps, for flow direction use house magnetic alarm switches (reed switches) and a magnetic on the direction vane, every 30 minutes the unit wakes up and checks temp, direction and speed. Hobo http://ww...

I use a load bank to test 100k generators and the machine has three analog meters on the front panel that are connected to current sensing rings that are fitted over the three input wires. This might be a little harder to install but I haven't seen anything like what your looking for. Something like...

They are correct 13.5 to 14.7 volts is the normal working window for a vehicles alternator voltage regulator. You can discharge a battery "many" times then recharge the battery and it will still have a useable service life in starting the vehicle, it is also true that the battery will neve...

If the battery "test" bad than it a bum battery, if the car had a draw that drained the battery you would be able to recharge the battery and use it. The parasitic drain on the battery depends on the size of the battery, Fords group 65 truck battery allows something like 40mA draw per ther...

Smoke_Maker wrote: Engineer1138 2AM What in the world would anybody need spares parts for a 2am, go to bed. I think that will get your RealTechie (tm) status revoked. To me it's a sign to total focus and passion to be working on a project and realize it's 2AM. I wear that badge with pride. OUCH :ee...

Engineer1138 2AM What in the world would anybody need spares parts for a 2am, go to bed. :razz: I took a look at your web site, interesting. I can't wait for you to put a hyper link on "How to write better software". Useful, purposeful projects, where do I start. I have so many projects an...

What do you think will hold interest, Engineer1138. Fun stuff "toys" or something useful "tools" ??

My bad, you were talking about NiMH not NiCad, the batteries are close in construction except the anode is made of hydride alloy. So the research stills holds, if you can put together a NiCad that works you will be a short jump away from NiMH.

That is a very lofty goal to build your own Flooded NiCad. Finding the material to make the plates will be hard to say the least, making all the plates the same so they play well together will be even harder, but I think you should go for it. I have no clue how to do this, but I think I would start ...

Here is a project I would like to build, a electronic roulette wheel. I belong to a dinner club and the 15 or so of us have had a hard time deciding where to go the following week for dinner. I was thinking of a box with 20 LED's each with a switches to bypass the LED's that are not in use or was la...

There is a bunch of toys I would like to have on my work bench. 1. One power supply on my bench with all the different voltage outputs, regulated, isolated, and three outputs of each voltage 2. Circuit efficiency meter, how much energy is my design wasting, watts in watts out. 3. Battery cycler for ...

How about a E85 Hybrid vehicle. E85 sure would put a dent in our crude oil usage, but until we cut the amount of energy we use were still in trouble, I don't think there is enough acreage to put a big dent in it with the way we use fuel (or should that be the way we waste fuel). Here is what other p...

What helped in the demise of the electric car in the early 1900's was energy density, in today's batteries and gasoline it takes about 600 pounds of lead acid batteries to equal one gallon of gasoline. The numbers weren't that good back in the early days but with the invention of the radiator and th...

jollyrgr, You are right about E85 and biofuels but your grade school teacher is also right, we are running out of fuel. For me, it's not about the here and now but it's about the future of my great, great, great, great, great, great, great grandkids. I wonder what they will be using for fuel? Hydrog...

Al, one of the first things you should do is to identify the battery (manufacture, Ah, deep cycle or SLA "starting-lights-accessories") these facts all make a difference to your answer. This battery may not work the way you need it to, a deep cycle battery left partially discharged for a t...