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#circuit

2 posts2 participants1 post today
Public *
tjhowse

I build #circuits to drive projects, like a kiln controller or a robot. My prototypes are built with bought modules on #veroboard. A module takes Vin and GND, and provides IO as SPI, I²C, 0-5v, etc, so I can ignore the specifics of each chip and work on the fun integration stuff.

The problem arrives when I want to make a #PCB without modules. I then I have to open a million datasheets and spend a week finding components, fixing footprints and routing.

🧵 1/2

#electronics#circuit#kicad
Public
Research Network Digi-Oek.ch

[en] #Yale #research|ers have figured out a better way to control the path of light on small #chip|s, a breakthrough that could lead to better and cheaper sensors, smart phones ... devices.

"#Photonic integrated #circuit|s (#PIC|s) use light, or photons, to provide ... advantages over conventional electronics ..."

"... move everything on chip ... it could significantly reduce the cost of optical communications devices and other technologies ..."

engineering.yale.edu/news-and-

engineering.yale.eduYale Team Creates Revolutionary Chip-Scale Optical Isolator | News | Yale EngineeringYale researchers develop non-magnetic optical isolator with 2 terahertz bandwidth, enabling cheaper, more efficient photonic integrated circuits for next-gen devices.
#ResearchHighlights
Continued thread
Public
C.

Yes, you take your chances - there's the occasional outright scam, or so-so quality parts (like the ones that inspired me to write this), but you go into it with your eyes open. You take a chance because it's dirt cheap.

And 90% of the time, the parts are just fine.

For anything important, or safety-related, or mains-connected, or anything I build for other than personal use, I won't use yum-cha parts like this. For those, I order good name-brand parts from a reputable supplier (Newark/Element14/RS, DigiKey, etc).

But for hobbyists just having fun, messing around? AliExpress and friends are an absolute godsend. You can now get into hobby electronics for practically nothing, and build stuff and see if you like it.

There's a place for quality parts, and a place for cheap parts. Knowing which is which isn't hard.

Three cheers for cheap components!

2/2

#build#maker#circuit
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poleguy

I ordered some LED's, sockets, 2n2222 transistors and some 12V relays today.

What do you all think of this plan:

USB->UART (buy it)

UART->LOGIC output (build it: see falstad/video)

LOGIC->RELAY (buy it)

POWER- through relay (spare 12v from shucked HDD's)

Automotive/pinball LED T10 bulbs in sockets mounted to PCB or 3D printed structure. (buy it)

#electronics
#soldering
#microsoft
#MicrosoftTeams
#onair
#onairlight
#dietz
#chrome
#python
#ee
#circuit
#falstad
#LED
#arduino
#raspberrypi

Amazon order describing the items in the post. Arriving tomorrow.
Continued thread
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poleguy

My python code sends data out of the serial port if Teams is On a call and sends nothing otherwise.

The circuit turns the LED red when it sees pulses and leaves it red for a second or so. As long as it gets serial data once a second or so the LED stays on. If anything goes wrong it goes off

Would you buy a serial to on/off GPIO output module like this?

#electronics#soldering#microsoft
Continued thread
Public
poleguy

I have simmed and soldered and achieved blinky blinky!

Next step. It's not bright enough. Buying a logic level relay and some T10 LED bulbs. I'm going to try some things.

falstad.com/circuit/circuitjs.

A falstad.com circuit of BJT inverters. The middle stage is a filter that stretches low pulses.
#electronics#soldering#microsoft
Public
The Chaotic Good 🏳️‍⚧️🏳️‍🌈🖖

Hey #DIY #Electronics #circuit folks - I'm working on a project that requires me to replace an SMD component on a circuit board that's going to be in an automotive/motorcycle application (not directly in moisture, but will be outside) - What's good for conformal coatings these days? Any recommendations?

The board is SMALL, and I've got a coating remover pen, but I'm thinking a new coating before I put everything back together will be a good idea.

So many choices...

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