Gas station without pumps

2018 April 15

Rapid delivery

Filed under: Circuits course — gasstationwithoutpumps @ 09:37
Tags: , ,

I made a serious mistake in putting together the parts list for my Applied Electronics course this quarter—I forgot to include a potentiometer on the list. I think what happened is that in previous years I had put the trimpot on the first quarter list, but we didn’t use it until the second quarter. I had a note to move it from the first-quarter list to the second-quarter list, but the move only happened half way (it was removed from the first list, but not added to the second one).

The mistake was pointed out to me be students in my Thursday office hours (they were asking where the potentiometer they were to use was).

Late Thursday night (after the evening labs were ordered), I ordered 85 25-turn 10kΩ trimpots from DigiKey, and they arrived Saturday morning (at 36 hours, about the fastest delivery I’ve ever had for anything other than pizza—particularly good for a delivery from Minnesota to California).  The Post Office package delivery gives good service here (now that they are no longer short-staffed as they were in December).

Because the lab course fee for the Applied Electronics course has all been spent on parts and tools already, I probably won’t be able to get reimbursed for these parts. The $76.52 they cost is probably the price I’ll have to pay for my mistake. (It isn’t my most expensive mistake in the last year—I forgot to pay my first installment of property taxes on time, which cost me a couple hundred dollars in penalties.)

Although I’m very happy with DigiKey’s rapid service, I might still specify trimpots from AliExpress next year, since 100 trimpots would cost only about $12 with shipping (ePacket, not the unreliable China Post).

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