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In the situation I was working in we had specification drawings for everything we had made off campus. They always included the type of base material, usually mil-specification types. Things like the bare board thickness and thickness of plated on copper and tolerances were always specified.
It is normally specified by the designer. A lot of pcb material two ounces of copper per square foot. I had many circuit boards where we ordered six ounces plated on top the basic board. These were for high power circuits.
Maybe the selection of a different motor? Bodine makes a group of motors that use a right angle worm screw drive. Some have permanent magnets in the motor and the armature has a commutator and the only voltage you need to control is to the brushes. Very much like radio controlled cars and boats...
Nope, that still won't because you are still just varying the ac available. Washing machine motors here in the USA are two speed motors. 1725 R.P.M. and 3450 R.P.M.or there abouts. The doubling of the rpm is caused by switching in more windings that effectively doubles the frequency. If you...
Harris electronics had a design tutorial on a dvd or a cd on digital sub-woofer design. I built a sub-woofer for my home theater from it. It really rocked the house! My son has it now. My wife would not let run it anymore.
If I can find the dvd/cd and Harris doesn't have it any more I'll ask for...
I have found that when teaching non-technical types using Items of plumbing and car mechanics helps.
Diodes function like "Check Valves" and tubes/transistors are like "Valves". Tubes are often referred to as valves in schematics in Europe. The biasing is the controller of the valve. Resistors...
Induction type motor are controlled by frequency on speed. Just varying the ac available will just over heat the motors.
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Would work fine for a light bulb or a series wound motor. But not an induction motor.
These are not specifically recommendations for your application. These are generally just for demonstration of the process I would use.
This is how my motor home was rigged up. Never had a dead starting battery and the 12 volt lighting system did not run out. In very remote areas I could...
Get a battery isolator and a deep cycle battery. The isolator keeps your starting battery safe from discharging and the deep cycle will workout just fine for the above mentioned drains and situations mentioned.
The deep cycle batteries are used for trolling motors on bass fishing boats. The...
There is a device that was used in color televisions that had the CRT display. It was called "In rush limiter."
Looked somewhat like a thermistor. It starts out with a high resistance and then goes to a lower resistance.
But that was used in an AC circuit on the input to the power transformer.
Also there is a problem with contact bounce. Depending on the load this can wreak havoc on your power supply that could affect your controller. There are devices called "transorbers" that deal with that problem. One part number I can recall is VLA130 buy General Electric. Part number might be...
I have the chilton's service manual with schematics. I figure that monitoring the Tachometer and the speedometer will give enough information for the computer to do the job. This truck has the 4.3 L V-6 Vortec engine. It was fuel injected and that failed and it was cheaper to change the intake...
Has anybody designed a micro-controller for a general motors automatic transmission?
I have a special project in which one is needed. I have a 1995 GMC Jimmy with four wheel drive and the computer is not functioning on the transmission. I won't require cruise control or any of that. Just...
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