I would tend yo disagree a bit with the other comments. First of all, let’s talk about the scratch. It does not looks very deep, so most likely no damage to traces. In order to have a short you would also need to have two traces exposed and some metallic object between the two. This also look unlikely to me. I would clean the area with isopropyl alcohol, check it visually. You could also cover up the scratch with nail polish.

Then, the missing capacitor. First of, I cannot make from the picture if there was a capacitor soldered there in the first place. Sometimes there are purposfuly unpopulated components. In any case, all of the capacitors you are seeing on the backside of the CPU are decoupling capacitor. They serve no other purpose than to help stabilize the voltage versus the dynamic power draw. This means that less capacitors equals less stabilisation, but not necessarily incapacity to function. I would clean also clean it up and ensure that no metallic object touches the pads. I would probably not try to replace it, as you have no way of knowing what value the capacitor is supposed to be (usually no schematic/boardview for modern products).

It is theoretically possible to damage the CPU due to a short, but likelihood seems very low to me in this case. I would clean it up, check visually, and try to turn it on.

Pocketbook makes nice e readers too! Issue then is mostly with getting books, especially non-drm ones

Oh god, I never considered that .* could theoretically match ... Thanks fish for not doing that, more than likely saved my unknowing ass a couple of times

I believe it does. Weakly reciprocal license like LGPL is not equivalent as a permissive license like Apache. I see two main things on the top of my head:

1. This ensure that no one can license wash ffmpg and e.g. use rockchip’s repo to distribute their own private product based on ffmpeg without publishing their changes
2. It ensures proper attribution of the work, which can have an impact on the developer’s careers and ffmpeg as a whole.

On top of this, it really should not be complicated to license this code properly (unless rockchip wants to allow point 1, which is illegal)

I do not know if they are open to the public per se, but it seemed to be something they do quite regularly. Concerning the material, they say on their site that it is a “polymer”. On this page they go quickly over how the measurements work.

I was actually not visiting sensirion, but lumiphase. A smaller company they are investing in which does optical chips. It’s interesting stuff, they are also depositing unusual materials on the silicon wafer to make their chips work.

Thanks! I recently was in the headquarters/production facilities of Sensiron which interestingly are located near Zurich in Switzerland. It’s quite rare to see production of IC’s in this country. The “magic sauce” of the sht40 and friends is the deposition of a certain matieral (can’t remember which one) on top of the classic silicon die.

Hey! Props to you for trying something new. While the through hole components look OK, soldering large gauge wire can be quite tricky, especially if the soldering iron is not powerful. What soldering iron do you use? In these cases especially, it is important to wick the wire first, wick the soldering pad and finally assemble the two. Raising the iron temperature for this can also be useful (I sometimes use 400° or a bit higher). It is counter intuitive, but hotter iron means quicker soldering job, and less heat in the surrounding area (e.g cable’s insulator)

The green and orange colors are quite typical of the phoenix contacts brand. It’s not a perfect match, but this model is very close: https://www.phoenixcontact.com/en-us/products/printed-circuit-board-terminal-sptaf-1-7-35-il-1861988

For edits whithin a page, I use inkscape. Both program combined have covered all my needs until now.

Looks great!

If your are looking for pur aesthetics, I would recommend trimming the resistors/leds, and bending their leads before putting them on.

If you’d like some inspiration this guy has some of the best looking hand crafted electronics I’ve ever seen.

Actually, a least some cars (probably more than you think)/have some sort of “emergency” breaking signal, which often result in the usual breaking signal blinking for a while. You need to seriously slam the brakes to see it though. E.g: https://m.youtube.com/watch?v=j_osu1WgGMU

There is also a nice technology connection video talking about braking lights for electric cars and in general, which can be dangerous.

Nice! Could you explain what it is or where to find more information about it? I was not able to find information online

We are working towards having a product properly packaged. This is a prototype that is not mature enough yet to justify the cost/time to package it. Moreover, this custom chip is used to measure ultra low currents (down to femto amps), so any packaging could potentially interfere with the measurement capabilities (-> no epoxy). It is however protected by a large shielding box, but it’s no use during assembly/modifications :/

The little gray wires should be all nice and straight. Even though your chip may be a good boi, touching it will wreak havoc on the wire bonding. Repairing the damage shown on the picture takes a skilled worker and very expensive equipment. Even then the repair is not fully guaranteed to be successful.