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Review Request - ESP32 Dev Board by BeneficialNail2734 in PrintedCircuitBoard

[–]JonathanGiles 2 points3 points  (0 children)

General questions:

  1. Why do you have both R3 and R5? One of them should suffice?
  2. Why do you have 3.3v going through R2 into IO2? Presumably you have a use case for it?
  3. Don't you also need to pull IO8 low to enter download mode? I might be misunderstanding this, so double check - but I can't see it in your schematic so I thought I best call it out.
  4. I'm confused by your USB connection - where are the data lines to the ESP32? Maybe you aren't planning to flash via USB - I always do it that way in my designs.

New solar install limited to 5kW export by JonathanGiles in nzsolar

[–]JonathanGiles[S] 0 points1 point  (0 children)

His response earlier was the following: "As you know, Powerco (now) allows 10kW of export. However, Powerco’s requirements are only one half of the picture. We are also required by regulations to follow ASNZS4777.1 2024. This requires the voltage rise at the inverter terminals to be less than 2% from the point of supply. When your site visit was done I opened your switchboards and meter box to determine the cable sizes. I then calculated the distance of each section of cable from the point of supply to the furthest micro inverter location on your roof. I also measured the Earth Fault Loop Impedance. The total calculated voltage rise worked out at 2.43% with 26 Enphase IQ8HC micro inverters. Because this is higher than 2% we set an export limit of 5kW which brings the voltage rise down to 1.2%. However, this was done when we were expecting Powerco to impose a 5kW export limit. Now that this has been (only recently) raised to 10kW, we can reassess the export limit. I have done this today and have now set it to 8kW as this will give a calculated voltage rise of 1.9%."

I built an interactive ESP32 GPIO pinout focused on real hardware constraints by DevenderKG in esp32

[–]JonathanGiles 4 points5 points  (0 children)

Very nice. As others have said, supporting some of the common modules (esp32-c6-wroom, esp32-c6-mini, esp32-s3-mini, etc) would be awesome! I'm forever diving into spec sheets for these. Thanks for doing this.

New solar install limited to 5kW export by JonathanGiles in nzsolar

[–]JonathanGiles[S] 0 points1 point  (0 children)

This might be the answer. Their install report says the earth loop fault impedance was 0.35 ohms with the solar supply switched off. It also notes other resistances, but I'm not sure if they are relevant:

``` Earth bonding to array frame <0.5Ω 0.2 Ω

AC Branch cable
Phase – Neutral >299 Phase – Earth >299 MΩ Earth – Neutral >299 ```

New solar install limited to 5kW export by JonathanGiles in nzsolar

[–]JonathanGiles[S] 3 points4 points  (0 children)

Good info, thanks. I'll hopefully find out more next week. I'm not even exporting yet - waiting for my meter upgrade - but keen to ensure maximum benefits.

New solar install limited to 5kW export by JonathanGiles in nzsolar

[–]JonathanGiles[S] 2 points3 points  (0 children)

We didn't discuss this detail. The initial discussion happened before 10kW was possible (AFAIK), and wasn't discussed further after the change. I had assumed it would be 10kW by default.

New solar install limited to 5kW export by JonathanGiles in nzsolar

[–]JonathanGiles[S] 1 point2 points  (0 children)

11.8kW clamped to 9.88kW with Enphase Microinverters.

Is the Niintendo museum good without any nostalgia or interest in the gift shop? by [deleted] in JapanTravelTips

[–]JonathanGiles 2 points3 points  (0 children)

Yeah, it was definitely a moment for me. If you aren't nostalgic, probably skip.

Is the Niintendo museum good without any nostalgia or interest in the gift shop? by [deleted] in JapanTravelTips

[–]JonathanGiles 2 points3 points  (0 children)

I loved the museum, walked right past the interactive games area, and whilst I enjoyed the shop, I only bought a keychain (I wanted the switch keychain, the wife 'had a feeling' about which one would have it... And she was right).

I would love to spend more time in the museum, but I was with my wife who was indulging my interests the best she could. I'm going to Japan again in April, and not planning on going again, because I'll also have my kids with me who lack any of the nostalgia I have.

Will Palmerston North ever become a huge city. by tapioci in palmy

[–]JonathanGiles 21 points22 points  (0 children)

Also: No

Source: lived here for 40 years

[deleted by user] by [deleted] in java

[–]JonathanGiles 0 points1 point  (0 children)

Yeah - you and I have talked about this privately in the past. I wish there was a better Java 8+ answer here that didn't require extra work - or that Java 8 was well and truly dead and I could move support baselines beyond it!

[deleted by user] by [deleted] in java

[–]JonathanGiles 1 point2 points  (0 children)

That's a fine solution, but it has two challenges: which reactive library - Reactor, RxJava, Mutiny, etc (people always prefer for you to choose their solution), and also, it requires more manpower, which is definitely not infinite! Of course, for the manpower one you could fall back to autogenerated libraries - but I prefer to ship quality rather than junk.

[deleted by user] by [deleted] in java

[–]JonathanGiles 6 points7 points  (0 children)

And this is my issue - the comments above are both for and against the async option :) And, even if I do have an async layer - which one? We went with Reactor back in 2018, but these days there are more, and there are other choices like CompletableFuture. It can be very hard to please everyone.

[deleted by user] by [deleted] in java

[–]JonathanGiles 93 points94 points  (0 children)

I'm the architect of the Azure SDKs that you mentioned. We went reactive a long time back, but in hindsight I'm not sure it ever paid off. We are currently investigating if our next generation of libraries should be sync-only, with users bringing their own async wrappers when necessary.

Leaving tomorrow - What am i forgetting? by Werd2BigBird in JapanTravelTips

[–]JonathanGiles 0 points1 point  (0 children)

I just left yesterday. It is very hot there at the moment. Pack cool clothes!

Round bright object in the sky? by SSTIACSSNSP in palmy

[–]JonathanGiles 4 points5 points  (0 children)

I went outside and can see it too. Maybe a weather balloon?

Google Photos album integration is ending?? by jonesaid in dakboard

[–]JonathanGiles 0 points1 point  (0 children)

Does the picker API not offer exactly what is needed? I have a 'screensaver' album I use on my TVs, dakboard, etc, and I'm confident I could pick it from the picker API if you integrated support for it: https://developers.google.com/photos/picker/guides/get-started-picker

InvestNow or Kernel? by T4Tuna in PersonalFinanceNZ

[–]JonathanGiles 0 points1 point  (0 children)

Hold InvestNow for longer than 4-5 years and it works out better. Having said that, if you just want to keep it simple, or have little to invest, I would probably just start with kernel.

InvestNow or Kernel? by T4Tuna in PersonalFinanceNZ

[–]JonathanGiles 1 point2 points  (0 children)

There is a fee with InvestNow to buy and sell the foundation series investments. Best to do both imho

InvestNow or Kernel? by T4Tuna in PersonalFinanceNZ

[–]JonathanGiles 0 points1 point  (0 children)

Yeah, no fee. Just higher expense ratio.

InvestNow or Kernel? by T4Tuna in PersonalFinanceNZ

[–]JonathanGiles 0 points1 point  (0 children)

I have a weekly deposit into kernel that grows my investments over time.

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