I think averagejoe72677 may misunderstand the function of the "ballast" resistor in conventional ignition systems. First, it was used by virtually all auto makers since the sixties and was used to make starting easier. When cranking, battery terminal voltage for a "12-volt" battery can drop to 6 or 7 volts ... the load during cranking can be several hundred amps! The ignition switch bypassed the resistor during cranking so that a good spark could be produced by a nominal "6-volt coil". Once the engine was running, the resistor (typically about 1 ohm or so) was back in circuit - to avoid overheating the coil and burning the "points".
No argument about the stupidity of assuming mechanical fasteners automatically have good electrical conductivity. I've seen hundreds of Chevy tail-lights that didn't work because they used the clip that mounted the socket for ground contact. Some old headlights made the same mistake. More electrical engineers (make that good electrical engineers) need to inspect and approve car designs!
I had a 1972 Dodge Dart I bought new. The electrical system in general was designed by monkeys. I was warned early on to keep a spare ignition resistor in the glove box as these fail without notice and leave you stranded. It seems Chrysler chose to run the ignition system (points) on 6 volts and the rest of the car on 12 volts. Why on earth they did that is beyond me as all other makes used 12 volt systems.
I had a Chrysler Horizon the first year that they were made and after having front wheel bearings replaced six or sever times (every 1500 miles), they finally sent a top guy out to check the car. What they found was that the ground strap from the starter to the frame ground was missing and every time the car was started all the current went through the wheel bearings and cooked them.
The fact these cars are easy to work on shows in the photo as the owner of this Scamp must be having a lot of fun with it. The engine compartment shows a lot of modifications from stock. Aftermarket valve covers and spark plug wires, Carter Competition Series 4 barrel carb on an aftermarket aluminum intake which necessitated the mounting of the coil on the firewall, the windshield wiper motor has been removed. A fuel pressure regulator is mounted on the inner fender panel which most likely means the car has an electric fuel pump feeding it. The heater has been bypassed or removed because the hose which typically feeds it has been rerouted to the intake manifold. This car isn't your typical "grocery getter" anymore!
I had a 1973 Duster, w the famous slant 6, which was a hand-me-down from my father. The problem I had, when the car was about 15 years old, is that the column shifter wouldn't stay locked into Drive. Being disinclined to disassemble the whole steering column, I never figured out what the minor part was, that was holding the thing into the detent.
New versions of BASF's Ecovio line are both compostable and designed for either injection molding or thermoforming. These combinations are becoming more common for the single-use bioplastics used in food service and food packaging applications, but are still not widely available.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This radio show will show what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.