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MP, The MAX232 alone consumes >=5mA at idle so this is not safe to do I think.

Dazza, Why two extra alternators, you already have one in a vehicle and you have the battery? Or you are going to create a second 12Volt system just for the reactor? Then I can see why it will be tight under the hood (or maybe you say bonnet)? OK about the efficiency, unfortunately there will be losses and they can vary depending on several factors. How much charge is necessary to keep the battery in shape, how big (Ah) is the battery? How much of the time will the voltage from the alternator stay in the high range? The constant charge regulator will have a voltage controlled limiting circuit not to overcharge. Furthermore there will be no charging below about 15 to 16Volts, the constant charging circuit will not work at lower voltage. An example, we have chosen to charge at 15A and the battery is after starting at 11Volts. The reactor needs full boost (full throttle on the way to a sale) alternator puts out 32Volts. A calculation show ((32

Kain, The PSU looks good, I can see it

Hi Rhonn, You should avoid messing with the ports like that; it can cost you the motherboard. :o Just get 5 or 12Volts inside from a free device power connector its much safer. Don

Hi Kain, If you want to put some extra money in the project you could go for water-cooling. The psu will not be very mobile but it will be immortal for sure! ;D

quantum, The difference is the capacity (mAh) and the physical size of the cells.

Dazza, It can be done but not with good efficiency, it should be possible to charge with constant current. There will be heat losses because the voltage is sometimes twice the needed for charging a 12V battery. And it will work only as long as the voltage from the alternator is higher than a certain point and will supply nothing if below. This involves of curse more electronics and it will not simplify the construction. Why are you desperate not to add a second alternator? ??? I am a patience man don

Dazza, Yes that

Audioguru, Here is one of my supplyers : http://www.tecxus.com/ They have 9000mAh.

Dazza, Interesting story! Well it all makes sense to me, so it must be correct! ;D But I was wondering about the waves influence on the electrolysis in the reactor. Will just a little rubbing of the molecules improve the amount of hydrogen produced or the speed of the process or both? Trigger, You may have a point there!

I can

Ashweth, What do you mean suggestions, where to start or choice of material or what? Kumaran, I like the idea of using a harddrive, good bearings, good balance and easy to get. The core for the coils is a bolt, this is steel and not optimal for a magnetic core. Try to get

Suraj, Yea, makes you wonder doesn

Hi Audioguru, Where I shop batterys the D cells (R20) has 7000mAh

Rhonn, Don't you have a scope? I

:o :o :o It is a resistor according to the symbol on the pcb!

Here is a regulator and some schematics: http://www.national.com/JPN/ds/LM/LM317.pdf

Hi Rhonn, The voltage put out by the ports can be viewed on an oscilloscope or measured with a multi-meter.

Hi Sharath, The technique you described is commonly used to measure the airflow in the intake manifold of EFI engines. For this principle to work with high precision it must have one part of the bridge in a protected and controlled environment. The sensing wire must also be placed in clean (filtered) air to prevent any particles to build up on it that would cause faulty measuring. I don

Dazza, Yes, a walk through was what I meant. Sorry if I was blurry. I noticed that you are charging the 12V battery from the alternator. This alternator is at the same time used at up to 24Volts, am I on track? Q2 will not survive the current here I am afraid. :o I would be better to have a separate alternator for 12 V if possible (Is it possible?) or there must be a current regulation also or insted. You are trying to control the output current from the alternator, the normal way is sensing the output voltage and control it by exciting the armature winding. In this case you are already using the armature coil for a different regulating purpose. And everybody makes mistakes so don

Dazza, do you know if there are smaller magnetrons that can be varied in its output without pulsing? What are they used for originally and what voltages are required? Will this

Dazza, Yea we

stuee, The kind of input on the projectors power supply determine what kind of inverter you could use so

Look better?

Dazza, I don