TheStumbler

This weekend I had several addresses which I had copied and pasted on my computer for a report I’m working on. They were in various, less-than-perfect formats. But I happen to know that the Korean Postal service operates a website that is perfect for my needs.
You input a casually formatted address, in either Enlish or Korean, and it gives you the correct and acceptable format, also in both English and Korean.

While unclogging this home paper shredder, I discovered an unexpected method of providing a time delay. The shredder has an automatic mode, where a small microswitch detects that you’ve inserted a sheet of paper to be shredded. When the trailing edge of the paper passes the switch, without time delay the motor would shut off immediately, leaving a small piece of the paper unshredded. The shutoff time delay allows the paper to be completely shredded before turning off the motor.

In the process of troubleshooting a broken controller, I decided to sketch the circuit schematic. It was a real fun exercise, seriously, and the results are below. Next post will be my guess at the theory of operation. I already have figured most of it out, but I want to make a few measurements before saying I fully understand the circuit.

I received some more goodies from my friend in Seoul. Maybe I’ll redesign these 1980’s circuits into something more modern, and open my own model railroad electronics store.

Just as the annual Korean Drone show in Busan arrived last week, The Stumbler’s annual super sinus infection arrived. The doctor prescribed six different medicines and told me to stay in bed for three days, exactly the same three days of show. And he was right, I needed all three days to recover.