I've been a home owner for little over 3 weeks. Just removed my last possession out of the flat I've been renting for the last 13.9 years. In moving house, I'm forced to face the sheer quantity of junk I've accumulated over that time and any memories that get stirred up. Having to make a snap judgement on what to throw out, give away, or take with me was both cathartic as it was saddening. It has fully occupied my mind to the extent that I have lost touch with what is happening in the world
The mechanism is so mesmerizing (requires viewing in slo-mo) I could watch for hours. Makes me want to build my own version so I can finally put to use the bag of tiny springs which my Dad had harvested from various printers and tape players over the years
#Fake operational transconductance amplifiers I bought on #EBay over 6 years ago. Date code doesn't make sense given that Intersil discontinued the #CA3080 over a decade ago. The real chip should have a diode across pins 4 and 5. Only one chip seems to have it -- but it is reversed. The rest have resistors between pins 1 and 4, and between 4 and 5, consistent with an op amp that provides offset null pins. Pin 8 also seems to be connected. Both 1 and 8 should be NC. #electronics#opamp
The die mask claims to be LM4250. I already destroyed 2 of them trying to guess the pinout, but using the pinout of the LM4250 seems to work with 7 of them. They behave just like a jelly bean op amp.
At least the single rail #opamp#oscillator circuit works with these counterfeit chips. Maybe I'll turn them all into #LED blinkies and Schmitt triggers.
The DC rails on this failed switching power supply from a wall wort AC adapter, were shorted together. It could be one of 4 components: 2 electrolytic capacitors, a surfacemount ceramic capacitor, or a surfacemount Schottky diode. Started desoldering each one and testing for the short. It cleared when the Schottky diode (SK26) was removed
Unfortunately it still doesn't work. LED doesn't light and still reading 0V on the DC side. Something else on the PCB must have failed. The 1N5822 still seems fine so perhaps the SK26 had failed first and took out other components.
Probably will just scrap it for parts. These wall worts cost £12 at Asda if I ever need new one.
Found a really large disposable #vape in the grass. It seems to allow one of 4 flavours to be selected. But it is still a single-use device. There is no USB-C port for recharging the battery. #ewaste#ecigarrette
@mavu
I think she's mostly active on Instagram these days. Her more recent stuff there was riding on the Barbie hype wave. Perhaps she finds Meta's algo easier to game than YouTube's which seems to disproportionately favour crypto, and now AI.
The tiny 400mAh #LithiumPolymer#battery in this cheap #Bluetooth#speaker turned into a puffed up pillow. I've replaced it with a 350mAh one I salvaged from a single-use disposable #vape device. In spite of the lower capacity, it is significantly larger than the original battery. Hope it can still fit in the available space.
Also fitted a JST connector to the speaker wires in case I need to disassemble again for a future #repair.