I might. I already emailed them for another project asking what model screen they were using, and they refused to share that info, so I don’t think they’re too open to hardware hobbyists.
The other project was adding a light. There is a vendor that offers a front-light for that model, but it’s like $60 and the result is too thick to fit in the stock Playdate.
Yeah, I hit up a few on Alibaba. Even one who can apply the black border on the glass. No responses so far and it’s been a few weeks.
Your drawing is a little confusing. Here’s what you need:
There’s nothing special about a setup with a light in the button. It’s literally just an incandescent bulb across the button. If you connect your circuit across the button terminals, it’ll work fine.
The 4 diodes in a loop is a “full bridge rectifier” that gives you DC from AC. The 5V regulator could be something like an LM7805.
The “large capacitor” is to keep power applied while the button is pressed, though you might be better off in that case with some small onboard battery. You just have to make sure that your battery charging circuit doesn’t draw too much power.
So a doorbell transformer steps 120VAC down to a lower AC voltage. That’s what you’re measuring (surprised you can’t tell if it’s AC. Your multimeter should have an AC/DC setting).
The circuit puts the transformer, the button, and the bell (classically an electronagnet that accelerates the hammer) in series. When you close the switch (push the button) the hammer strikes the bell.
An electromagnet is just a coil of wire, and it is possible to pass a small amount of current through it without activating the hammer. If you’ve ever seen a doorbell with a light up button, the light bulb is placed in parallel with the button. That way it’s always on drawing a small amount of current. It also explains why the light switches off when you press the button. You’re shorting across the bulb, so it’s voltage is zero.
If you want to use this power for an electronics project, you’ll need to find a way to draw just a small amount of power from the transformer. It has to be very small or you’ll activate the hammer.
Drop a full bridge rectifier in parallel with the button, then a bunch of caps to give you a steady-ish voltage and then some kind of voltage regulator to make it useable.
Just remember that you can’t draw too much power, and you’ll lose that power whenever the button is pressed.
and nobody knows how to code anything and read datasheets anymore.
You seem a bit bitter which I can relate to. As someone who cut his teeth writing assembly for an 8051, I remember feeling a bit cheesed by people using arduinos to do what could be done with a 555.
My career has gotten comfy, but I can feel my skills stagnating with all this new stuff coming out. I of course would never ship a product with a Raspberry Pi embedded in it, but I’d like to have a feel for how to solve problems using newer more advanced hardware. With that in mind, do you have any recommendations?
The closest planet to Earth is Mercury.
On average that is. Mercury is actually the closest planet to every other planet in average. Because when it’s on the other side of the Sun, it’s still pretty close.
I watched Funny Games in theaters in high school and it pissed me off so much. I literally shouted “fuck you” at a screen in a public theater. It wasn’t until much later that I realized that was the point.
I’ve been meaning to watch it again.
I did!
And now I’m learning it’s based off a short story. Gonna have to pick that up.
“Listen to the sounds of the machine” From Elephant’s Dream, a short animated film.
I’m an engineer, and there’s something almost spiritual about that line and its delivery. I think about it every time I’m debugging or trying to understand how a complex system works
The ask was
What would be some fact that, while true, could be told in a context or way that is misinfomating or make the other person draw incorrect conclusions?
Switching from a 5mpg truck to a 10mpg truck does more for the environment than switching from 40mpg car to a 55mpg car.
Eh. On the border.
Never fight a land war in Asia Scroll down to casualties.
That’s just my response to the argument that you can choose to not tip because waiters will make minimum wage regardless. Minimum wage is not an appropriate salary for that line of work.
However, yes, I agree that laws should be changed to remove tipping or at least to require restaurant owners to pay an appropriate wage for the work with optional tips on top for exceptional service.
Being a waiter is a skilled job that deserves more than minimum wage.
Timeline (2003) just for “Night Arrows!”
NASA used steak and eggs https://www.tastingtable.com/955518/why-steak-and-eggs-was-the-choice-breakfast-for-astronauts/
Alibaba is talking directly to the manufacturer. At least in my experience. Haven’t heard of trade wheel.