Uploaded June 2013 | Updated September 2026, 3 weeks ago
My levolor cordless cellular shades broke. Rather than replace to send them off to be repaired, I decided to tear them apart myself and figure out how they work. Inside, one will find some plastic parts with some metal springs. The springs get "sprung" easy and come off their sprockets. There appear to be lots of different kinds of cordless cellular shades, so this video might use parts that your shade doesn't use. Nevertheless, I hope the technique may be similar.
My levolor cordless cellular shades broke. Rather than replace to send them off to be repaired, I decided to tear them apart myself and figure out how they work. Inside, one will find some plastic parts with some metal springs. The springs get "sprung" easy and come off their sprockets. There appear to be lots of different kinds of cordless cellular shades, so this video might use parts that your shade doesn't use. Nevertheless, I hope the technique may be similar.
![Raspberry Pi 4 Thermal Investigation [Part 2] Frequency cap, Throttling, & Real-world test](https://i.ytimg.com/vi/D5YuP0IDFKU/mqdefault.jpg "Raspberry Pi 4 Thermal Investigation [Part 2] Frequency cap, Throttling, & Real-world test
In this video I continue taking a look at the thermal properties of the raspberry pi 4. I spend some time looking into frequency capping in detail. I even take a heat gun to the pi to make it cap and throttle all the way down to 300 Mhz. Then I do some real world tests to see how much heat comes from youtube streaming to an HDMI monitor, copying data to/from the USB3 port, and compiling software in the background. Then I throw the same delta fan on it that I showed in the previous video and demonstrate that performance returns back to normal.")
