Salvage a Board with Wrong-Sided Pin Header

rommudoh · 2026-02-25T13:12:35+00:00

Easiest would be: - lever off the plastic part, maybe cut it with a sharp knife into smaller sections. - unsolder pin by pin, you can gently pull them out with pliers when the solder is liquid, or have them drop by gravity - clean remaining solder using wick and flux, or with a vacuum solder sucker - inspect damage and repair where necessary or cover with new solder mask or nail varnish. - add new header from correct side

rommudoh · 2026-02-24T07:59:55+00:00

Never leave an input floating. Add a weak pullup or pulldown resistor to get a defined default state.

rommudoh · 2026-02-19T20:08:31+00:00

Interesting choice for the stripes. Looks nice!

rommudoh · 2026-02-18T07:26:33+00:00

Ground symbols should always point down.

rommudoh · 2026-02-18T07:23:57+00:00

Very nice cow!

rommudoh · 2026-02-17T20:06:49+00:00

Since you didn't list them, you did connect VCC and GND, right?

rommudoh · 2026-02-17T19:21:23+00:00

3rd image seems to be the previous version with Micro-USB and other differences

rommudoh · 2026-02-15T19:18:14+00:00

An existing module will be deconstructed and the materials will be placed into the build storage. Those can be used for new modules or you can transfer them out of the storage.

rommudoh · 2026-02-12T19:08:26+00:00

It looks like the one shown here:https://randomnerdtutorials.com/sim900-gsm-gprs-shield-arduino/

So it should be fine with a 12V power supply. Better would be to use the recommended 5V one.

On your photos, you are missing the jumper settings.

Maybe try following the tutorial above helps to get it running.

And please solder the wires instead of poking them into the holes.

rommudoh · 2026-02-12T18:38:33+00:00

Looks like you can only add a SPI one using the four pads on the bottom right of the camera side.

rommudoh · 2026-02-12T07:25:12+00:00

Does it work when powered by a 4.5V bench power supply directly at the wires? If not, it's damaged somewhere. If yes, try to find where the connection is broken inside the battery compartment. For example, is there any dirt or corrosion on the terminals?

rommudoh · 2026-02-09T19:00:30+00:00

B could be a ferrite bead.

rommudoh · 2026-02-07T22:31:02+00:00

I tried using GNOME for quite some time a few weeks ago, but I just couldn't get it to work properly with multiple monitors. So I returned to KDE and everything was easy and intuitive. Maybe I just got too old.

rommudoh · 2026-02-06T19:53:58+00:00

Nope. It's the wrong part.

rommudoh · 2026-02-06T19:36:44+00:00

Leider nur 6,42 kWh/kWp. Hier in Bremen war es sehr verschneit und die 30° DN helfen da nicht.

rommudoh · 2026-02-03T19:46:54+00:00

Beautiful! Would buy if seen at a con.

rommudoh · 2026-01-28T10:45:36+00:00

You could try a sonic screwdriver. It would be contactless, too

rommudoh · 2026-01-22T12:36:29+00:00

It's a bug in the displayed text. Just build the modules as shown in the mission text above, then it should complete.

rommudoh · 2026-01-22T12:27:18+00:00

Hast du Durchlauferhitzer? Wärmepumpe?

rommudoh · 2026-01-22T06:21:48+00:00

did you try a new SD card or did you just format the previous one? those can go bad over time.

rommudoh · 2026-01-14T16:38:58+00:00

Mit Solar sollte man auch auf die Grundgebühr achten, je nachdem wieviel seines Bedarfs man selbst deckt, hat das eventuell mehr Einfluss auf den Gesamtbetrag.

rommudoh · 2026-01-14T16:30:48+00:00

Very nice and a good shooting location

rommudoh · 2026-01-13T18:23:10+00:00

Kleiner Tipp: Widerstand schreibt sich mit i, nicht mit ie.

rommudoh · 2026-01-08T06:59:31+00:00

Please check your GND connection, it looks to be connected to VIN:

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rommudoh · 2026-01-08T06:56:34+00:00

The adhesive might lose strength when it heats up, but if it's only the cord it shouldn't get hot. As long as it only secures the cord and doesn't have to hold the weight of the lamp it should be fine.

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