Archive for July, 2012

8th July
2012
written by Todd Harrison

In this video I teardown and cleanup a 20 year old Swintec 401DP printing desk calculator.  It was still working and I needed a good desk calculator for my bench.

I cover how some of the electronics work as well as the mechanics and of course my efforts cleaning and greasing it up into perfect working order. Good for another 20 years I say.

I picked this one up at Goodwill for $3.00 with 10 rolls of paper. It might have worked but it was in horrible condition and filthy as you can imagine, it had a hard life. Still Goodwill is a great place to score old electronics.  Normally I don’t fix stuff I get from Goodwill I just tear it down for fun and for spare parts. The old parts are still the best for hacking.

 

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7th July
2012
written by Todd Harrison

I was working on my 1994 Jeep Grand Cherokee today. Just changing oil and replacing an upper radiator hose. I put my hand on my cruise control module and leaned a bit too hard on it – “SNAP”. I broke off the vacuum nipple at the base of the plastic molded housing. That’s the end of that! Well, my cruise hasn’t work for over 10 years so I wasn’t too sad.   I thought I might as well do an autopsy to see how it worked and if it didn’t work then what went wrong so long ago.

Here is the full module with vacuum diaphragm canister control and throttle cable.

Below are the control solenoids that dial in just the right vacuum to pull the diaphragm and throttle cable back to a selected cursing speed.

 

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