Ever wanted to add a lot a flash memory to a small microcontroller? NOR flash or EEPROM are ok, but only for small size. For Gbit range, you need NAND, and with NAND comes CCR, LUT, wearleveling, etc… Furthermore, they are darn expensive in small volume.
SD and microSD card are very interesting: they cost nothing, and you just need a SPI interface as the controller is included.
Last night, I thought: “why not reflow a complete microSD card”, as the card is composed of the same resin as chip casing and pins are flat bellow the microSD card and even golden, fore sure it should not be a problem to bring this to 270°C for 3 min….
Lets open Kicad and start with the schematic with Eeschema:
Then PCB new for the board layout:
Let’s submit the gerber files to OSH Park
That was my fastest board made ever, 1h30 from searching the pinout to the final payment!
See you back in few week for the oven reflow test!
Projet retro console très sympathique
- USA Prepaid SIM Cards for Short-Term Wireless Service – Ready SIM
carte SIM prépayée (voix + data) pour les USA
If you have access to a simple desktop mill/router, and you are not into mechanical part design, here is a very simple workflow:
You will only need free/open source program:
A simple Ikea-hack will do for the wooden box: DRAGAN 2-piece bathroom dish set, bamboo
The front panel is milled
And fitted in place
The 2 stainless steel feet are from Ikea again
Thanks Dan Heeks for the very good software.
- Installer sa clé SSH sur un ESXI 5 – Apprendre c’est bien, comprendre c’est mieux
ssh-copy-id ne fonctionne pas avec un serveur ESXi.
Il faut copier la clé SSH dans un fichier particulier :
- Ondes électromagnétiques – L’argumentaire des associations passé au crible – UFC Que Choisir
Uniquement de l’effet nocebo ?