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Some FPGAs are commodities. Here’s one with a PCB for $13. Can be used with an open tool chain too. I could probably find an even cheaper one if I looked harder.

https://store.tinyfpga.com/products/tinyfpga-a1

Just like with GPUs, FPGAs with bigger die areas cost more. The biggest ones are expensive, just like with GPUs.

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All TinyFPGAs are sold out for now :(

Interesting. The AX is out but the AX1 ($15) is in stock. https://www.crowdsupply.com/tinyfpga/tinyfpga-ax-bx

I suppose the price is a bit misleading because the AX also requires the $12 programmer so with shipping+tax to CA it's closer to $30 total out of pocket.

Personally I use the BX because having the flash, and a bit more logic, is convenient.

The AX is not iCE40, thus no icestorm support, and it is tiny. Few designs can fit in there.

Do look for iCESugar on aliexpress instead.

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