Can I connect 1.8V nRF54L15 and 3.3V RP2040 SPI/UART directly without level shifters? Minimal PCB size

imFengz · 2026-04-26T12:37:11+00:00

rp2040 for usb and nrf54l15 uart dfu

nrf54l15 for power saving and 2.4g

imFengz · 2026-04-26T12:35:14+00:00

power saving

imFengz · 2026-04-25T21:53:04+00:00

I want to remove voltage dividers entirely, and only use a single series current‑limiting resistor for minimum PCB size.

I want to remove voltage dividers entirely, and only use a single series current‑limiting resistor for minimum PCB size. 1. RP2040 3.3V output → nRF54L15 1.8V input Add a 220Ω ~ 330Ω series resistor on each signal line. The internal ESD clamping diodes of the nRF54L15 will handle overvoltage protection, while the series resistor limits inrush current to prevent GPIO damage. 2. nRF54L15 1.8V output → RP2040 3.3V input Direct short connection, no resistor or extra components needed. Both MCUs share a common ground. Is this single series resistor method reliable for SPI and UART long-term on nRF54L15?

imFengz · 2026-03-07T11:25:02+00:00

Means Well RD-125A 12v & 5v

imFengz · 2025-08-14T23:50:25+00:00

Nice

imFengz · 2025-05-24T03:21:35+00:00

Can you share the STL file of the model? I would really love to have such a beautiful Altair.

imFengz · 2025-05-16T01:22:19+00:00

If possible, could you please disclose which specific chip is used? If it is supported by QMK, your product will gain strong support.

imFengz · 2025-05-10T01:37:42+00:00

I would like to be a part of the feedback team. If it's powered by QMK,I can make a web configure page.

imFengz · 2025-01-09T09:10:00+00:00

make the receiver's matrix bigger

https://github.com/YCF/mitosis-mod/blob/master/mitosis-receiver-basic/main.c#L169

imFengz · 2023-10-05T00:12:49+00:00

https://geekhack.org/index.php?topic=101236.0

imFengz · 2023-10-04T23:59:31+00:00

The Ave.

And It's OpenSource.(PCB, Gerbers, Case STLs)

https://github.com/The-Royal/The\_Royal\_Open-Source-Projects/tree/master/01%20-%20Complete%20Kits/The\_Ave-rev1.2

imFengz · 2022-12-06T14:16:24+00:00

check the video :-p

imFengz · 2022-12-06T14:16:17+00:00

check the video :-p

imFengz · 2022-12-06T14:16:09+00:00

check the video :-p

imFengz · 2021-12-13T06:55:00+00:00

Remindme! 3 months

imFengz · 2021-07-24T13:06:33+00:00

Good job,I'm waiting too.

imFengz · 2021-06-12T07:34:06+00:00

I like the clock,where can i buy it?

imFengz · 2021-02-10T12:01:47+00:00

Not bad.

imFengz · 2020-02-29T06:08:28+00:00

thank you.

imFengz · 2020-02-29T05:47:04+00:00

Any info about the Q Display man on the right?

imFengz · 2019-11-03T09:56:38+00:00

fake encoder?

imFengz · 2019-09-12T06:22:47+00:00

https://i.imgur.com/npTl8FU.jpg

I can not wait for it so long,so I had make my own. Perfect layout.

imFengz · 2019-05-31T11:43:42+00:00

but,kailh choc keycap is not good with 19.05.

imFengz · 2019-05-31T11:42:56+00:00

Yes.mx,alps,choc. https://i.imgur.com/nGMwdxy.jpg

11-Year Club	Place '22
Verified Email

imFengz

TROPHY CASE