GrechTech Ltd

Working on a range of open source and commercial hardware for gaming, electronics and computing. Focus on controller adaptors with accessibility in mind.

[GrechTech Ltd @GrechTech]

Want to play NES games with original accessories on emulators?

Need a low latency wireless connection between your NES and its accessories?

Our new open source project turns NES gamepads, Zappers, and Power Pads into Bluetooth (BLE) controllers!
https://t.co/XKBH3A3zAv

[Jacques Gagnon @darthcloud64]

#BlueRetro v24.10 Overhaul rumble to support variable intensity and dual motor. 8bitdo NGC Modkit is supported. A few other bugs are fixed too! See full changelog https://t.co/LCfQEXpOK8 and download at https://t.co/jQAjQLwnmW

[TheTrain @TheTrain24]

The GP2040-CE team is happy to announce the release of v0.7.10.

v0.7.10 is a large release that updates a ton of backend code and bring a significant number of new features to the firmware.

You can check out the full notes here: https://t.co/ETkS80b1qw

[Jacques Gagnon @darthcloud64]

Pre-order for my Bluetooth adapter for OG Xbox #BRX will start July 12th if all goes well. More info next week!

[GrechTech Ltd @GrechTech]

Put this together recently as there were no existing solutions for an RP2040 USB to UART bridge using PIO that supported full duplex operation reliably, necessary for use cases like programming an ESP32 using the RP2040 as a bridge with any GPIO pins.
https://t.co/heHv1mLsG4

[Jacques Gagnon @darthcloud64]

#BlueRetro v24.04 adds PC-Engine Keyboard support! It also fix various bugs! See full changelog https://t.co/QrgX7gVjyT and download at https://t.co/jQAjQLvPxo

[GrechTech Ltd @GrechTech]

@youruglyclone Yep it is swappable, it uses a single 44-pin header

[GrechTech Ltd @GrechTech]

@youruglyclone That is an option, or we sell pre-prepared cables here, that will be provided pre-connected if ordered together https://t.co/inDIo76zYe

[Jacques Gagnon @darthcloud64]

#BlueRetro v1.9.2 Add PS2/PS3 pressure buttons support! A few other bugs are fixed too! See full changelog https://t.co/ZMSqkYsQkj and download at https://t.co/jQAjQLvPxo

[GrechTech Ltd @GrechTech]

@str8_up_n1nj4 Hi, the Wii Ext cables are now back in stock

[GrechTech Ltd @GrechTech]

@cyothevile For BlueRetro, if used with a system and loader that supports GameID, it allows automatic per-game configuration of mappings. Particularly useful for N64 or if using different BT controllers for different games or systems. Some more info here: https://t.co/HtA1D0ydhI

[GrechTech Ltd @GrechTech]

The recently updated documentation includes initial instructions on using the units in the newly supported Transmission Mode

This can turn retro (and Wii/Nintendo Classic) controllers into Bluetooth outputs!

Perfect for use with emulators and BlueRetro
https://t.co/h11OLoKhk2

[GrechTech Ltd @GrechTech]

The RetroRosetta V2 Base is now open source, with all parts on a 20% sale for 1 week!

https://t.co/b9XC5JfD8V

[GrechTech Ltd @GrechTech]

Ofc, there are a lot of bad USB(-PD) supplies out there users may use, so there's still good reason not to sell mods using this approach

But I see no engineering reason to insist on using exclusively OG PSUs that no longer meet modern EMC, environmental or safety regulations.

[GrechTech Ltd @GrechTech]

Great point here.

Bypassing a 7805 to supply USB 5V direct is obviously bad, but a well designed SMPS, such as a Triad, or a high end USB-PD supply, can be a very clean source of 9V power

While many original adaptors would no longer meet regulatory approval in much of the world

[Zaxour 阿宅 @zaxour]

I even go back to stuff like game gear with its dual switch mode supplies (buck/boost), the 32X (buck….okay maybe 32X isn’t a great example) and then the various switch mode power warts that shipped with the consoles before then. Given the PCB cost constraints of the day, they weren’t even properly constraining the loop area of the high current loops and likely leaning on the large value caps to sink the high frequency transients as well as inductors between the voltage rails and regulator output.

I’ve been spending a lot of time over the past year designing and laying out switch mode converters and load testing them to characterize their noise/ripple. The only one I had that exhibited egregious high frequency noise was when I routed the return path for the output incorrectly, which caused this horrorshow, which shouldn’t be hooked up to anything you care about 🤡

[Jacques Gagnon @darthcloud64]

#BlueRetro v1.9.1 Add 8BitDo Keyboard support & Famicom Family BASIC Keyboard support! Various regression from the last year are fixed too! See full changelog https://t.co/DQFzdJYuy8 and download at https://t.co/jQAjQLvPxo

[Jacques Gagnon @darthcloud64]

Great video from @TynologyGaming that goes through the #BlueRetro feature set for the Dreamcast. I will add his configs as preset soon. https://t.co/BmqpUZ6tz8

[GrechTech Ltd @GrechTech]

Looking for another way to play classics like Jet Force Gemini with the controller of your choice?

Want to play co-op but need an option for friends that struggle with the original N64 controller?

Dive straight in with with BlueRetro's built in presets!

[GrechTech Ltd @GrechTech]

🕹️ RESTOCK 🕹️
RetroRosetta Receiver (Universal BlueRetro) bundles are back with a sleak new Dark Blue option 🎮
https://t.co/jpQQxdEl2o

[GrechTech Ltd @GrechTech]

Two-way universal retro controller conversion support is coming soon with RetroRosetta!

Ideal for using original controllers with BlueRetro or emulators on PC/Android/etc.

Support provided by open source alternate firmware, long planned and supported on all RR hardware!