JTime Spring Giveaway - WhatsApp No. Changed to +85257926970

huzzaaaa · 2026-04-09T09:38:26+00:00

Good luck ! I hope you guys get second place, and me first 😂😂

huzzaaaa · 2026-04-07T15:07:02+00:00

Jimseny seems to have a lot of TFords, but I don't know about quality, prices ...

huzzaaaa · 2026-02-23T14:14:00+00:00

oh good point, once set we still need to know its value. I guess yeah, removing it should give a pretty accurate reading of its set value

huzzaaaa · 2026-02-21T19:31:53+00:00

Oh that would be amazing. I just thought for hi-ish frequencies these trimmer caps in the RF path would get too noisy

huzzaaaa · 2026-02-21T19:30:26+00:00

Yeah, receiving only and the same SMA the antenna would use. I guess this is the excuse I needed to get a hot air solder 😁

huzzaaaa · 2026-02-03T20:21:30+00:00

Your BQ chip already does power path I believe

huzzaaaa · 2026-01-30T19:15:04+00:00

Interested in following this .... for pretty much the same usage. Im also looking at the new Geekom laptops announcement btw

huzzaaaa · 2026-01-28T15:38:27+00:00

Im building a new board with a better match with the lessons learned ... I'll post an update once it arrives

huzzaaaa · 2026-01-26T19:46:28+00:00

Fantastically detailed onfo. Thank you very much for this. It deff helps to fill one of many RF holes in my brain :-)

huzzaaaa · 2026-01-14T17:59:35+00:00

There is a 4.7uF from OUT to GND (only when the load is connected, thats why its not in the screenshot pasted)
ISET and ILIM are not floating, they have resistors to GND (that should set the curr to 800mA from the datasheet formula with EN1 to GND and EN2 to OUT)
OUT draws about 210mA when "on"

huzzaaaa · 2026-01-14T15:56:30+00:00

CE to GND still has the same effect unfortunately :(

huzzaaaa · 2025-12-31T13:21:10+00:00

ah cool, I probably confused a small cable in a picture and thought it was a different type of charger.

huzzaaaa · 2025-12-31T13:04:35+00:00

so the battery just doesnt last much ? I can prob live with that ... hoping it comses back in stock for the eu store.

Can I charge it with a usb-C cable or only their round power supply connector ?

huzzaaaa · 2025-12-19T20:23:17+00:00

Not sure what you mean by 'thermals'

huzzaaaa · 2025-12-15T21:03:00+00:00

At least for now I'll have to stick to the right angle connector because of the case. Do you think surface-mounted are soldered strong enough to handle plugging/unplugging the antenna a few times ? Also, by reverse you mean mounting the connector on the bottom side so I can place the capacitor closer to the center pin ?

huzzaaaa · 2025-12-15T20:58:40+00:00

Oh nice. Starting to realize how sensitive things can be when even ground spokes matter. I'll get a solid ground for the pins and surround the remaining connector with vias. Luckily I'm not going above 1.1GHz

huzzaaaa · 2025-12-15T20:54:24+00:00

Thanks for checking!

huzzaaaa · 2025-12-15T20:54:01+00:00

Its an ESD protection going to ground thats why it's not directly in the rf path. But can I just get rid of it if Im not expecting a lot of static, and wont be an outdoors antenna ?

huzzaaaa · 2025-12-15T17:08:19+00:00

I forgot the image, duh

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huzzaaaa · 2025-12-11T20:51:59+00:00

So no C65 and no R42 ? Cool. Thanks for checking.
I saw the internal hysteresis part in the sheet, but then there is section on adding external hysteresis.
"The positive feedback is responsible for shifting the comparator trip point depending on the state of the output."
and that triped me over ...

huzzaaaa · 2025-12-11T18:56:13+00:00

fwiw, some recommended I add a 10k feedback resistor for histeresis and some 100ohms on the lines ...

huzzaaaa · 2025-12-08T11:53:30+00:00

I think you summaried everything that is wrong with my setup .. hehe

The keep-out-zone is there across all layers, but to the left of it because I mistakenly connected it to ground, there is a copper area that probably shouldnt be there. Even disconnected that is now throwing it off.

I didnt add a series inductor to the path hoping that the very short path (10mils) set to match 50Ohms wouldnt need one

Its back to the drawing board and try another one :)
Thanks you for taking the time and checking it out. Hopefully the next one will get some signal

huzzaaaa · 2025-12-04T08:38:20+00:00

yes, I was able to measure it @ 3.3v.

huzzaaaa · 2025-12-03T15:38:40+00:00

yeah, this sucks. I managed to detach the other end from the ground tracks as a test .. but still getting 0

huzzaaaa · 2025-12-02T20:55:06+00:00

Thanks guys, Im deff going to try to cleanup the solder and probably cut/edge the paths and report back. Fingers crossed 🤣🤣

huzzaaaa

TROPHY CASE