What is Reddit's opinion of 5v Regulator, DROK 5pcs Mini Voltage Reducer DC 4.5-24V 12V 24V Step Down to 5V Buck Converter Board 3A Volt Step-Down Transformer Power Supply Module?

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Yeah. I use this:

5v Regulator, DROK 5pcs Mini Voltage Reducer DC 4.5-24V 12V 24V Step Down to 5V Buck Converter Board 3A Volt Step-Down Transformer Power Supply Module https://smile.amazon.com/dp/B0758ZTS61/ref=cm_sw_r_cp_api_glt_fabc_K8SBVP2S84ZNQV60BN2K

But you might be able to do with a simple resistor.

5v Regulator, DROK 5pcs Mini Voltage Reducer DC 4.5-24V 12V 24V Step Down to 5V Buck Converter Board 3A Volt Step-Down Transformer Power Supply Module https://www.amazon.com/dp/B0758ZTS61/ref=cm_sw_r_cp_api_glt_i_AEQZ3FC355SKPKH6TZFS?_encoding=UTF8&psc=1

You can power esp32 on vn pin up to 12v. I wouldn’t go that high but 5v is fine.

You need a buck converter to lower the voltage to 1.5v

https://www.amazon.com/dp/B0758ZTS61/ref=cm_sw_r_cp_api_glt_fabc_RC08GYCZJDB7PGSKXMVS

This goes down to 1.8 volts if you solder the back, which would be fine (probably) you could also probably go lower if you use the pot on the top (instructions are in amazon)

I have a Noctua 4020 12v fan cooling my hot end. I'm running these buck converters in several spots on my rig, including the hot end fan: https://www.amazon.com/dp/B0758ZTS61/

They're a lot harder to work with than the large ones, but it means I can put the converter in line at the hot end without much added bulk, and have an easily replaceable fan without having to do a bunch of re-wiring.

yeah I just buy my components off amazon (or AliBaba if I need more than a dozen at a time), 3.3v and 5v regulators used to be amazing to just have around, but lately the new hotness are DC-DC supplies which are more efficient and can supply more current

these are the ones I order and they have a cool configurable voltage if you cut one of the traces on the back and solder a bridge to another point and run it from 1.8v-12v

That said, grab 5ea of 3.3v and 5v regulators. They're nice to just have in a pinch, and for a low-current application like a headset/speaker will be perfectly fine

Not sure if that’s considered advertising, but this is the regulator I installed for May 12v fans. I’m not affiliated with the link. Just recommending the product. You can solder a pas on the back to select the voltage output.

5v Regulator, DROK 5pcs Mini Voltage Reducer DC 4.5-24V 12V 24V Step Down to 5V Buck Converter Board 3A Volt Step-Down Transformer Power Supply Module https://www.amazon.com/dp/B0758ZTS61/ref=cm_sw_r_cp_api_i_r6kDCbFAJCCR3

You can use a barrel connector for the connection, but you will need a power regulator of some kind in order to bring the voltage down to ~6V. You can look into something like this

So far I haven't had the iFlight BEC's fail, but the other module would just jump to the source voltage level which fried a few controllers (assuming yours were the same as mine, looks like it)
https://smile.amazon.com/gp/product/B0758ZTS61/

Not to be an alarmist, about 2/10 failed on me during normal operation, sealed in a project box, and i decided to try a different step-down.

Like this https://www.amazon.com/dp/B0758ZTS61/ref=cm_sw_r_cp_api_glt_fabc_RC08GYCZJDB7PGSKXMVS

DC-DC buck converters are ~$2 or less if you buy them in a multipack even from Amazon. You just need to wire your fan's input power through something like one of these to drop the voltage: https://www.amazon.com/gp/product/B0758ZTS61/

I'm going to cunningham's law this since I'm in a similar situation. I think it's possible to power all of these devices using a powerful enough 12v supply and a voltage regulator. Then reversing the polarity of the cables as needed.

links:

https://www.amazon.com/Regulator-DROK-Converter-Step-Down-Transformer/dp/B0758ZTS61?pd_rd_w=zxFa5&pf_rd_p=ed2d9dd9-5e5e-4b68-81ad-abff01eb6452&pf_rd_r=QVMCS9HWSC7K92TH6JJS&pd_rd_r=4ca06e9f-e0c3-4c2c-bc69-19842667aad7&pd_rd_wg=VELVc...

https://www.instructables.com/Polarity-Reversing-DC-Extension-Cord/

Note: I am also a layperson and my advice is given with the hope that's it's correct, but not the assurance. If it fails it hopefully only blows up the regulator if things go bad, but if you care about the devices it's probably worth getting a power strip and having each device have its own individual power supply.

Thanks. I’ll order these. I had the L7805s already and thought it was a good use for them but ya that’s just wasted energy.

https://www.amazon.com/Regulator-DROK-Converter-Step-Down-Transformer/dp/B0758ZTS61

Yup, running servos off a "buck regulator" is the way to do it for crawlers and high powered servos.

I love these, but you need some soldering skills
https://www.amazon.com/gp/product/B0758ZTS61/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1&fpw=alm

These are bigger/bulkier, but easier if you aren't into a lot of soldering.
https://www.amazon.com/gp/product/B07F24WGBB/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1&fpw=alm

Oh sorry, I wired a "buck regulator" straight into the battery pack feed and set it to 5V and that is what powers the lights.

The project involves the use of a small 5V stepper motor which I am hesitant to power from the board even if the voltage is met. I don't have access to a reflow oven or anything like that at the moment so SMDs are likely out of the picture. This is just a hobby-level project I'm doing, just to give you a sense of scale. I was looking at something like this for a voltage regulator but I haven't used anything like this before. Do you think this would work or should I look elsewhere? I'll look into the AtTinys, thanks for that insight.

There is no 5v source in the box that I would recommend using in the box because the control board takes 12v and steps it down to 5v for the processor and other things on the board.

TH3D sells a board that connects to the power supply and gives you 2 usb ports for power, https://www.th3dstudio.com/product/raspberry-pi-3-amp-direct-wire-power-adapter/. If you are a bit of a tinkerer and have a fairly decent soldering skills and can figure out where to solder, you can get some 12v to 5v regulators and direct wire the Pi to the psu, https://smile.amazon.com/dp/B0758ZTS61/?coliid=I381MMKVXA4EGH&colid=3OG2ZT5QLWIBB&psc=0&ref_=lv_ov_lig_dp_it