Got my product on a Friday tired to use it but it won’t work. I contacted the guy on tindie found him on Instagram messaged him and sent a email. That was about a week ago still no reply on what to do with a faulty product. If you are going to buy careful with this person as he won’t get back to you if it won’t work as described.

If you want to make your own flash cartridge this is the way to go if you dont want to go thru all the hassle with am29f016/32 SO package where you have to solder all the different wires to the chip and then to the pcb.
This adapter lets you skip all of that, you just desolder the old mask-rom which was easy enough and solder this adapter board its place but if you have your own ssop memory you have to be careful for the little dot on the chip there are two of them one is bigger and shallow and one is smaller and more pronounced, you want the smaller one to align with the markings on the board I made a mistake and soldered it on backwards but it survived and when I soldered it on properly it worked.
I used japanese Pokemon Silver cartridge with MBC3 chip and I didnt find almost any information on where to connect the A20 pin - you have to run the wire to the second pin from the right on the top row, its inbetween XIN and RA18 - google mbc3 pinout and you will see that its an unmarked pin.
Its a great product, much cheaper and better than BennVenn's version which doesnt even use AMD memory and you cant buy just the pcb, shipping from here is cheaper too ! From me it gets 9/10 for the lack of MBC3 information

He recibido varias placas con o sin memoria soldada, y he de decir que si tienes un poco de maña con el soldador, te lo puedes soldar sin problemas.
en la placa del cartucho original queda con un perfil muy bajo por lo que no es problema para cerrarlo después con su carcasa.
La calidad de la PCB es muy buena y las medidas se adaptan muy bien para que quede espacio para la soldadura, animo a todo aquel que quiera probar, es facil y ademas tiene un precio muy bueno.
Saludos

Tras probar varios meses este producto he de decir que cumple totalmente con lo que cumple. Un acabado de calidad, tamaño compacto, ni un solo fallo.
Creo que, si lo que se quiere es, disponer de juegos 1:1 al original, con 100% de compatibilidad, y consumo super reducido, como el original, esta es la solución ideal. Además de que al tener un solo rom cada vez, no te lias como con el everdrive y similares, que metes mil juegos y no sabes cual disfrutar, de esta forma es como un juego normal, para mi eso es una ventaja.
Muy satisfecho con la compra.
Saludos

This is a genuine FT232RL. So documentation-wise, there's not much to say. You plug it into your computer and it works immediately.
This isn't the cheapest FTDI USB>UART, so why pick it? Well, for me the switch that allows you to use it for both 5V and 3.3V is an awesome feature. I don't know how many FTDI kits are out there with only one logic voltage level, but why do that? Sure, it's hardly complicated to set up a voltage leveller on your proto board, but you know what, when I just want to plug this in a debug something I don't want to have to mess around. If it's a feature that you would often use, you may as well have it as easy as possible and remove one additional source of error. So for me, the option to switch voltages easily makes this a must have product. The build quality is great, and this is a neat little tool to add to your collection.