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RE: Sketch-Y-Etch a retrospective drawing experience with a modern twist!

dougw — Tue, 27 Aug 2024 16:53:37 GMT

There is nothing like the pressure of trying to fix an exhibit you designed while the public is trying to view it or use it....[emoticon:458682de9e4d4e7c94377c4fe2884528]

RE: Time and Space Prize Shopping Cart

Steve524 — Fri, 19 Jul 2024 03:08:08 GMT

I think I must have misunderstood how the prizes were awarded hopefully next time I win one good job everybody...

RE: Time and Space Prize

shabaz — Sat, 13 Jul 2024 21:48:41 GMT

I drew a little breakout board for the GreenPAK chip, but it also supports the SLG47910 FPGA chip too.

(Note: a normal off-the-shelf QFN adapter PCB isn't the same; the pads are not standard).

The underside of the board can be used for (say) a decoupling capacitor, or pull-downs, etc.

The board can be used with pin headers and could also fit a wide DIP24 socket (15.24 mm spacing between rows).

I've not tested this yet, but it uploads fine onto PCB manufacturer website.

Here's the Gerber files in case anyone else wants this:

[View:/cfs-file/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-c4915b19-f890-4238-97cd-dd470f01dc61/export_5F00_qfn24_5F00_l_5F00_3_5F00_3_5F00_0_5F00_4mm_5F00_gerbers_5F00_rev1.zip:640:360]

Ordered from JLC PCB, for a total (including shipping) of £6.65 (qty 20, which is strangely cheaper than qty 10!).

RE: Time and Space Prize Shopping Cart

misaz — Fri, 12 Jul 2024 18:18:05 GMT

Congrats for winning! It is nice selection.

RE: Time and Space Prize

shabaz — Fri, 12 Jul 2024 15:45:13 GMT

There's a very small FPGA, part code SLG47910 that uses the same Go Configure software too. The dev-kit is about £200 though, but looks worthwhile.

It's in a 24-pin 0.4 mm pitch package, i.e. identical package to the GreenPAK chip.

It doesn't have a lot of capacity, but is definitely more than just glue logic, so it looks useful. It has SPI RAM access for configuration, but also has one-time programmable memory for making things permanent.

A downside is that only Verilog is supported not VHDL. However, on the plus side, the software is really straightforward, it could be very easy to get going.

The IP is straightforward too; from what I can tell, it directly provides the entire source, not just an interface.

Floorplan view:

There is a schematic entry method that immediately generates Verilog, so that could initially be a nice learning tool even without the dev-board.

I think the SPI interface also allows generating simulated signals, i.e. you can send in logic patterns, and view outputs, but I can't access that part without connecting to a real board, so I'm not 100% sure.

RE: Time and Space Prize Shopping Cart

beacon_dave — Thu, 11 Jul 2024 18:56:20 GMT

"...Newark/Farnell does not have many art supplies..."

Perhaps enough to get you in trouble though [emoticon:c4563cd7d5574777a71c318021cbbcc8]

"...CPC offers an impressive selection of Arts & Crafts materials and supplies that are suitable for a range of artistic abilities, whether you're a budding artist or a seasoned craft enthusiast. From paintbrushes and paints to clay kits and wood burning tools, we have everything you need to embark on your next artistic endeavour. Our Arts & Crafts range features top-quality products from industry-leading brands that are suitable for a range of ages. With our competitive prices and convenient ordering process, you can indulge in your passion for creativity or help younger minds discover a world of creativity without breaking your bank. Explore our Arts & Crafts collection today and unleash your artistic potential with CPC...."

https://cpc.farnell.com/c/computer-office/office-supplies-stationery/arts-crafts

RE: Time and Space Prize Shopping Cart

DAB — Thu, 11 Jul 2024 18:45:05 GMT

At least you have a start.

Have fun with the new toys.

RE: Time and Space Prize

shabaz — Thu, 04 Jul 2024 21:09:36 GMT

I installed the software needed for the GreenPAK device, which is called (awful name) Go Configure Software Hub. Upon startup, it was possible to select the chip, and then a 'GreenPAK Designer' window appears with a center black area for schematics.

For a first project I just clicked on the right-side pane list of internal components to choose an op amp. Them I selected some external components (resistors and voltage sources) using the left side pane. Very straightforward. Wires are added by clicking on any two nodes (only valid connections will be formed).

Then, I clicked on Debug, a simulation pane appeared on the right, and then it was possible to right-click on nodes to add probes.

When the simulation was run from the simulation pane, charts with the probe outputs appeared. The bottom blue trace is the op amp output.

Interesting how the output wasn't correct for the first approx 2 msec. Probably that's the chip initializing itself (maybe). I'm guessing.

So far I've only used the software, and have not tried to connect to the board.

Anyway, this is really neat. I need to explore this more. There are examples online, that do more sophisticated stuff such as reading rotary encoders and generating adjustable sine-waves.

The incredible thing is the low cost. These chips are about $2 in single quantity, yet house several op-amps, electronically controlled resistors, oscillators, logic and so on. They are also low-power (can operate from coin cells).

RE: Time and Space Prize

DAB — Thu, 04 Jul 2024 17:59:00 GMT

Nice set of toys.

I look forward to hearing what you do with them.

RE: Time and Space Prize

balajivan1995 — Thu, 04 Jul 2024 04:27:51 GMT

I'm planning on creating a voice assistant (Gemini API), but I need a really good microphone and speaker (with amplifier). The idea is capturing the audio using mic, storing it in ESP32's flash memory, and make a http post and get the response. I don't have much hardware knowledge and I don't even know where to started on mic and speaker part. Is it possible to use the audio dev kit for that purpose?

RE: Time and Space Prize

genebren — Wed, 03 Jul 2024 22:41:11 GMT

Very interesting selections for your prize. I am sure that you will find some interest projects to use these on.

A very deserved prize for a very interesting contest entry/project!

RE: Sketch-Y-Etch a retrospective drawing experience with a modern twist!

genebren — Tue, 04 Jun 2024 19:32:39 GMT

Cool! I once had the use of a development system for the old GameBoy. I wanted to develop a cartridge that I could use to build a DMM/Scope interface for the GameBoy. The first issue that I needed to solve was how to convert the system that was sprite based into something that would emulate a memory mapped graphics package. In order to develop and test the concept, I created an etch-a-sketch program over a software program to write/reuse sprites to simulate a memory mapped graphics. This worked out great and was a fun project. Unfortunately, I need to return the development system prior to getting my custom cartridge designed.

RE: Analog to digital Harmonograph

dougw — Tue, 14 May 2024 22:32:17 GMT

Great idea. Which drawing tablet did you use?

RE: Analog to digital Harmonograph

DAB — Tue, 14 May 2024 19:13:22 GMT

Interesting post.

Fun is where you find it.

RE: Sketch-Y-Etch a retrospective drawing experience with a modern twist!

javagoza — Tue, 14 May 2024 18:00:42 GMT

Very cool!