Patch job

K.C. LeeK.C. Lee wrote 11/11/2015 at 17:13 • 3 min read • Like

When it comes to procrastination, I lost to the repair works at my apartment. I had to patch up a couple of oversized holes left behind under the kitchen sink before I moved in. The new neighbor on the opposite side of the wall is a chain smoker. :( I have asked them to come in, but it is like supervising socially active teenage and the work quality wasn't up to par.

The proper way of doing this is to use dry wall mesh to act as scaffolding before applying drywall filler compound etc. I am not getting paid for this, so I am using whatever I have on hand - cardboard from soda cracker boxes and hot glue that I rarely use.

I measure the diameter out the large drain pipe with my trusty caliper. I found the old compass I had from high school for the circle! I cut out a slit and the circle with a pair of scissors. The cut out fits the drain pipe perfectly. I used tons of hot glue to glue the patch onto the wall board. I glue over a second piece rotated by 180 degrees over the top to add some extra strength.

For the other hole, I cut out an elongated slot. The two offset cardboards allow me to make some adjustments on the width/length aperture. I glooped the whole thing with ample of hot glue to fill the area between the two water pipes.

I went over the patches with my hot air tool to smooth over the glue and make sure that the glue are melted completely and soak onto the surface. It is not a pretty job, but is better than the unfinished repair work or the attempted Saran wrap by the previous tenant.

I ordered some STM32F030F4 parts from China. They are 16kB FLASH with 4kB SRAM 48MHz Cortex M0 in a TSSOP package for $0.60 US a piece at QTY 10. There are the usual 12-bit ADC, SPI, I2C, USART, timers and a 5 channel DMA!!! At that kind of price point, I wouldn't bother with the regular 8-bit chips.

Also ordered some of the Buck Converter modules. All you need is a couple of bulk input and output caps. Hopefully these should arrive before Xmas.

Canada Post and the Canada Custom are getting slower these days. My ten nRF24 clone modules arrived today. With the SFM32F030, these would make some low cost decent LoT modules.



Yann Guidon / YGDES wrote 11/12/2015 at 09:22 point

Good luck !
Smoke intole-rant here...

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K.C. Lee wrote 11/12/2015 at 04:20 point

Yes.  The building is old, so there are at least a couple of emergency work done on my side that involved then cutting out part of the dry wall for welding new pipes. There is a area between the kitchen wall where they are running power and the plumbing.  Likely there are also openings on the other side - from the exhaust fan leaky duct and/or additional openings under the sink.

Too bad there aren't any regulations on 2nd hand smoking for home here and looking at the land lord tenants records lead me to believe that it is hard to make a case.  Since I plan to live here for a while, it is in my interest to keep good relationship with the rental office.

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Eric Hertz wrote 11/12/2015 at 07:09 point

Wow. Well, glad you figured out how to fix it rather'n "making a case." Hope that works for yah!

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Eric Hertz wrote 11/12/2015 at 03:55 point

wait, so you're saying smoke was coming through the pipe-openings?

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