DesignCycle

Just found my stash of bagseeds from 18-20 years ago. A dozen or so different types, only a couple were known strains- a cali orange and a purple haze, but neither of those look viable. Wondering about growing them out to recover some retro genetics but I don't have the facilities to do it properly. Thoughts?

I want to design a PCB which uses a 9V AC supply, can anyone tell me if the UK "wall wart" style AC - AC adapters have any other components inside them other than the transformer?

I'd rather not have to buy one just to take apart because they are sometimes not easy to put back together.

Thanks

Hi folks, I've been delaying updating to the new version because I'm scared I'll lose my past projects, can anyone give some tips on how to do it safely? Or direct me to a tutorial?

Many thanks.

I'm working on a design which requires 9VAC. My initial design uses an on-board encapsulated transformer from 230VAC. However if possible I would prefer to use an external wall adapter and keep the board at low voltage. AC/AC 9V adapters are not too common but they do exist, and are normally supplied with a 5.2mm barrel jack connector. However, this is only a 2 pole connection, but my project also requires ground since it has 2 additional isolated ground planes bridged with Y-capacitors.

I'm wondering if anyone has an idea of how I can ground the board properly without having to bring 230VAC to the board? Ideally there would be a 9VAC adapter with a 3 pin connector but since even the barre

I used the Serial Monitor to record timestamps at the start and end of each task in this FreeRTOS program, then ran it the sketch on the WOKWI simulator and copied the resulting Serial log to a text document. Then I asked ChatGPT to write a python sketch to analyze the text document and display a gant chart of the task activities.

It's probably not perfectly accurate but I can see that the tasks are more or less doing what they should and it took about 20mins to do. I can see lots of opportunities to use strategies like this going forward.

Does anyone know of any active online communities for UK makers doing stuff with ESP32?

I've been using version 5.17 for ages and have accumulated quite a few custom components, but they are all spread around different folders on my system in a bit of a mess.

I want to upgrade to version 7 and I'd like to take the opportunity to organize my files. My question is, what's the 'right' way to structure them in a custom global library? And where should it live on my system?

Could anyone please explain the principle behind this "clutter filter" for AC power?

https://i.ebayimg.com/images/g/2TgAAOSwggtiWTBl/s-l1600.jpg

I can't understand how the diodes function.

Hi, I am designing a module which will be mounted in a DIN rail enclosure. The enclosure has options for terminals at the top and bottom of the unit. What are the conventions for terminal layout? I would like to position all the terminals either at the top bottom edge of the PCB, is this an issue? Which would be preferred? Is there a convention such as power in at the bottom and power out at the top, for example? What about the ordering of the terminals from left to right? I will be using barrier screw terminals with a pitch of 10mm, for 230VAC at 16A.

Any guidance or links to info in this area would be much appreciated. Many thanks.

I am designing a module which I want to mount in a control panel enclosure alongside other DIN rail mounted modules. What is the convention for terminal positions when designing for DIN rail mounting? I have seen power IN at the bottom and power OUT at the top; is this usual? Would it be ok to have all the terminals at the top of the unit? Are there any conventions regarding the order or position from left to right? It would be helpful to know the reasoning behind any conventions.

Thanks for your assistance.

I'd be grateful if anyone could check my workings. I want to calculate the requirements of a power supply for a stepper motor I have. I'm considering building an unregulated power supply for it since these are preferred for steppers, possibly with a toroidal transformer. The stepper is an old Sigma Nema 34, I believe it's a 21 3450 D 200 F1.2 from this spec sheet: Sigma (PDF). I measured the phase resistance which led me to believe it's the F1.2 not the F03.

It has 8 wires so can be wired in several different ways. I think I want to run it in Bipolar mode, in which configuration the data