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Aiming for a late March restock of fully assembled: Thundervolt Lite Fujiflex Unnamed PTH08080-replacement regulator ...as well as bare Fujiflexes and wifiFlexes. MelonHD will probably arrive in April. The bed of nails fixture for it is a little more involved.

Mjolnir is still on my roadmap, but I don't know when I'll get to it. Maybe this summer. I'm currently working on (re)stocking Thundervolt and melonHD, and doing some minor firmware tweaks to make TV more user-friendly and manufacturable.

Haha, probably not. But it will be fully open source! I've been finalizing the layout: Power planes on L3 and L4 Mitsumi V520B and controller ZIFs Housekeeping MCU, RGB LED, switches, multipurpose button GND planes and GND stitching Some more PCB artwork The housekeeping ATtiny will be able...

Hi Jackson! Cool project! :D The RP2040 and RP2350 have a USB 1.1 controller (peripheral and host mode) as well as PIO blocks which can do the sort of arbitrary protocol stuff you're after. Tails86 has had great success using them to connect USB controllers to the Dreamcast.

I've completed the placement and routing for the PD controller, LCD driver, voltage regulators, and the BMS! The BMS consists of a BQ29732 protector, MAX17055 fuel gauge, and BQ24292i charger. Only the BQ29372 is new to me-- I used both the MAX17055 and BQ24292i on my "new! UltraWii" PMS...

Hi everyone. I just launched flashfi.re, an online store where I sell hardware I've designed and other miscellaneous portablizing stuff. Right now you can buy Thundervolt 1 (very limited quantities!), bare flexes, and Alps SKEYAJA010 tact switches. In the near future I'll be stocking melonHD...

In DP Alt Mode, the SBU lines are already used for DisplayPort AUX channel

Thanks! Yep, NDA with Lontium is why. I reached out to them through their public sales channel.

The MST703 schematic is ~90% complete. Turns out the MST703 driver boards I had on hand were all 18-bit RGB, so they weren't suitable for RE. I ended up basing the design on existing MST70x schematics from CSDN.net, with some spot checks from @thedrew (thanks dude!) I'm not totally satisfied...

Made some progress on the audio stuff, including the stock DAC, mixing circuit and Scampi amplifier. I2S routing detail: I'm gonna use off-the-shelf Molex Picolock cables for the speakers: Next thing to tackle is the MST703 LCD driver.

Thanks, everybody! The modules will cost ~21USD each to produce. I will probably sell them for 40-50USD each to recoup some development costs, since the project has cost me around $1000. Doing this without flagrant violations of the USB spec is tricky. One option would be reducing...

melonHD is a video converter module I designed based around Lontium Semiconductor's LT6711A. It accepts an HDMI 2.0 input signal (up to 2160p) and outputs USB-C DisplayPort 1.2 Alt Mode. melonHD's purpose is to enable easy USB-C video output in any portable that has HDMI output. Here's a...

I've been working on the mainboard routing some more. It's tough stuff. I chickened out and moved to a 6-layer board. The SNES core routing would've been a nightmare with only two signal layers. The schematic is only about halfway done. Long way to go...

Wiring looks reasonable. Some things to try: Amp: Connect a different audio source to the amp, to confirm it works SNES: Wire the SNES audio to a headphone jack, and see if you can hear it with headphones Try reseating the sound module, if your motherboard has one Measure the sound pins...

The brownout issue and no sound issue are probably separate. My previous comments were only related to solving the brownout. Here's how my 1000uF 6.3V cap looks on the SNES mobo. It should be located close to the power input of the audio amp, so it can supply the bursts of current the amp...

I had a similar issue recently when testing a new audio amp on a SNES. The peaky current draw from the audio amp on the SNES's 5V rail caused the SNES to brownout and reset. My temporary fix was adding a large (220uF+) electrolytic capacitor to the SNES motherboard, right next to where the...

2022 - 2023 (continued) After four failed AICAflex revisions and hundreds of bucks down the drain, I decided to backtrack a bit and ensure that the AICA + audio SDRAM could be relocated successfully. This was necessary work because in my early tests, I had only confirmed that the DC booted, and...

Appreciate the enthusiasm, guys! After spending a lot of time combing through old photos and DMs with Wesk and Colton, I've pieced together the AICAflex saga. Thank goodness I messaged folks about the trials and tribulations, because I had forgotten almost all of the nitty gritty details. 2021...

In my experience, that black driver board only accepts 480i and 480p RGBHV. Sync-separated 240p RGBHV did not work the last time I tried it. EDIT: video showing behavior (SNES game with 480i menus, 240p the rest of the time) Since the vast majority of N64 titles output 240p, you're kinda forced...

2021 (continued) After proving out the manual AICA relocation, I started designing "AICAflex" to relocate the AICA and SDRAM. ElectronAsh seemed to have had some success replacing the AICA SDRAM with a BGA part, so I decided to go that route to save space. This was before KiCAD had the...