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I want to get into robotics, to make simples animatronics or something like that.
But I started to watch videos about eletronics, cus I've heard of some guy you need to know eletronics before robotics.
Should I buy an Arduino? I know there's a site with it digitally.
+Showing all 17 replies.
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anything STM32. arduino is fine if you know nothing.
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>>108051284
You don't *need* electronics.
But it does make things *easier*.

'duino is good - can get nano for dirt cheap - for playing with, but in the microcontroller world it's very ancient. 8bit, 16Mhz, small RAM/ROM (2KB/32KB). Still plenty good enough for many things, however.

Long term, you'll be 'better' served in 'robotics' by more complicated things, Raspberry Pi can give you a full computer. They also make the pico, which is kinda like a 'duino nano but 32bit, 2MB of flash for your code, and 133Mhz of CPU. Can even get 'em with builtin wireless. The pico 2 is even more performant. And still cheap.

For "robotics" you'll likely require a blend of microcontrollers for realtime processing of sensors and motor control, backed by more powerful compute like a Pi to direct them....

What you got in mind for a first project?
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>>108053659
Pi is bloat. Youd need a jetson to run ai and by then why wouldnt you use the localhost(your pc) or api. Just esp32 for everything with components as needed like the occasional capacitor and what not.
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>>108051284
Forgot to mention: Breadboards
Look into them. Wish I'd discovered these things when I was a kid, solves the twisted wire temporary circuit by giving you a matrix of holes to simply stab components into.

Makes building/rebuilding circuits dolly dimple. You'll not be poorly serviced by investing in several breadboards, you can keep a pi/duino in one and junmper cable to circuits in others - and you don't need to break one circuit to play with another.
Something like a T-cobbler can push a Pi's GPIO pins into a breadboard, I got one just for that.

Natrually, good stocks of capcitors, resistors, leds etc is a given, you'll likely play with lots o them in multiple projects.

Butone thing that I found *really* great was "fritzing". Lovely open source software that lets you replicate your breadboard project digitally. Click a tab and that breadboard on your desk is now a circuit diagram on your screen. Another tab can make that a PCB to ship off to fab... and your breadboard project can then sit in a tidy PCB..
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>>108053701
>Pi is bloat
Debatable.

>Youd need a jetson to run ai
Not nessicelery... There's much cheaper options about (and if you're crammin' in a jetson, why bother with a pi), there's various tensor processors in various formats. Can even get vision accelerators built into camera...

>why wouldnt you use the localhost(your pc) or api
There isn't always a network, or clean comms. Some things may require to be standalone...
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>>108053768
>there isnt always a network
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>>108053659
I was thinking about an endoskeleton project, a naked endoskeleton. I could put it in a lotta costumes. But I live in Brazil, I think these things you've said isn't so cheap here, i'll search it up. Thanks, man.
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>>108054048
Favela anon youre pinging the wrong guy. Ive been at this for like 3 years now. Im no expert but im no n00b either you hear. You want to make a cheap exoskeleton then skip the expensive high torque servos and get car wiper motors with a dc driver connected to an esp32.
You can find them in junk yards.
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animatronic endoskeletons that are shitty will cost you tens of thousands
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>>108054139
I've read your reply... But I don't want to make it walk, not yet.
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>>108054185
>consumergroid retard
thats why you build them for 700.
why are you even posting here?
fkn demoralize others because youre demoralized yourself?
>hurr durr ids too expensiv, dont even think about it jerk to ai smut uuugh
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>>108054211
If its an exoskeleton then you make it walk which makes things a lot simpler. You can also get metal for your exoskeleton from the scrapyard. Youll want to get an angle cutter or jigsaw that can cut steel though. Aluminum is a lot easier to work with though and weights less so i recommend that really.
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>>108054236
Thanks, dude.
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>>108054254
Np youll also want a construction drill with say 7-10 mm cobalt drill bits to bolt it with m12 bolts or so. You can also weld the pieces. You can rent the equipment.
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>>108053794
That doesn't magically make a network happen.

It can link to an existing network, but you would kind of need one first. There's many deployment senario where you'll not get cellular reception.

>>108054048
>a naked endoskeleton. I could put it in a lotta costumes.
/me shudders.
Each to they own...

>But I live in Brazil
I'm to understand the things themselves are about the same cost - but that cost might be more for you. Here, you can buy a 'duino or a pico cheaper than a large cup o coffee.
Luckily, these things are that 'cheap' that somone more than likely will be willing to post you one they got kicking about... But I hear your postal service gives you a 50-50 chance of it turning up...

as >>108054139 suggests, windscreen wiper motors have decent torque and can be found real cheap - but if that suit gonna lift more than it's own weight you might need to look into haudraulics...
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>>108055448
There are ways around hydraulics.
It doesnt have to be all wiper motors ofc it can be dc with gearbox too but wiper motors are robot gold for this because they're so cheap and self locking and pack lots of torque. You can even increase their torque if needed with a gear ratios.
Pic related is an example of how you can make it act like a linear actuator.
But if you insist on actual hydraulics/linear motors yes the cost might go up a bit.
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>>108055508
I just found out about boat trim actuators. These might also be good and be found at a marine scrapyard. You did say exoskeleton and not transformers right?

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