I just gotta say that's a really great comeback đ
Video Appetizer TLDR I built a shortwave radio receiver from scratch using only cheap and easily available components, i.e. standard transistors, op-amps and 74xx logic chips. No typical radio partâŠ
A shortwave radio receiver from scratch using only cheap and easily available components, i.e. standard transistors, op-amps and 74xx logic chips. No typical radio parts â no coils, no variable capacitors, no exotic diodes.
I agree with the Arduino approach for learning: try something that immediately gives feedback.
On a more concrete example you can start with Make: Electronics book by Charles Platt. PDF of the first edition (2009) is available from Makezine's own CDN. The book encourages learning by discovery. The leading text makes it clear:
Burn things out, mess things upâthat's how you learn.
Not my post/video. Link to mastodon.social post which then links to YouTube video.
Poster bought an old firewall hardware:
- saw unpopulated footprints on the circuit board,
- analyzed the chips,
- found the serial comm to access BIOS (blocked by password),
- dumped the SPI flash memory,
- obtained supervisor password,
- accessed the BIOS from serial comm,
- enabled the video display in BIOS,
- soldered the HDMI port,
- soldered the SATA power and data ports and the associated components,
- connected a SATA SSD,
- checked that the SSD is being recognized in BIOS,
- made modifications to firewall circuit board to mechanically secure the SSD, and to face plate to facilitate the HDMI port,
- installed FreeDOS and used it as a retro gaming PC.
This blog post got reviewed by Hackaday. https://hackaday.com/2023/08/11/using-jtag-to-dump-the-xboxs-secret-boot-rom/
Released in November 2001, the original Xbox was Microsoftâs first venture into the game console industry. With its hardware closely resembling a cheap but v...
Using Intel CPU JTAG to dump the secret bootrom in Microsoft's original Xbox. Disclaimer: not my blog.
USB-PD is a pretty cool part of USB-C â tons of voltages and powers to choose from mean compatibility with a huge range of devices, and for supplies that support Programmable Power Supply (PPâŠ
Blog not mine. I'm just sharing.
