Dimbulb's newsreader is wrong.
in [Design]
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From: John Larkin on 29 Jun 2010 23:46 On Tue, 29 Jun 2010 21:27:51 -0600, m II <c(a)in.the.hat> wrote: >John Larkin wrote: > >> Nice touch, avoiding all that distressing higher mathematics. >> >> Any idea how the wattmeter works? Is it a dual-coil electrodynamic >> thing? > >Yes, it is. You gave me the incentive to remove the back of it. There >are two current transformers on the sides, one for the Watt meter and >the other for the output Amperes. The auto transformer is in the >middle. I was quite impressed with the quality of the fittings and >workmanship. I've put two more shots on the page. > >http://scotiabunk.com/ > >I saved six or seven of these things when a local school stopped >teaching electronics. They were going to the dump. > >Sad. > > > > > >mike I presume you are using the bridge rectifier to reheat that cup of coffee. John
From: m II on 30 Jun 2010 00:06
John Larkin wrote: > I presume you are using the bridge rectifier to reheat that cup of > coffee. Why, yes..cough...cough... In reality, I'm using it to cool the diodes. They don't much like rectifying 120 volts at five amps. The liquid used to be clear, virgin Canola oil, but Archie besmirched it's reputation in the most vulgar display of hedonism I've ever seen. Claimed he was checking viscosity. The oil must be a good insulator. There's been no bubbling on any of the terminals and I know there must be one or two percent water in that mixture. Why Canola? I have twenty gallons of it, it was salvaged from a restaurant. It will become diesel fuel once I get motivated and do some plumbing on a Lister clone. It resembles this: http://www.youtube.com/watch?v=lOVvPjMwsrU Six horsepower at 650 rpm. 750 pounds (340 Kg) weight/mass. Theoretically they last forever. The original English ones ran 40K+ hours. Another related project will be an Arduino microcontroller. I'd like to make an automatic starter for the engine and monitor temperatures, etc. Batteries low? Start the engine. The canola has to be preheated close to the boiling point of water before being injected. The idea would be to start the thing on regular diesel, heat the veggie oil and after five minutes, switch to Canola. At shut off time, a solenoid switches to regular diesel and runs for five more minutes. That flushes the veggie oil out of everything, assuring an easier startup next time. mike |