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Guru's Useful Eagle PCB Designs Page

Last update: 11th November 2022
This page contains some very nice and very useful Eagle PCB Designs. Most of the items here are new designs to improve old things although some are obsolete things from the 80's that have been resurrected. The purpose of this is to provide an online backup in one place, instead of them being scattered all over the internet.

Many of these projects are freely available on the net if you look, although some are abandoned/dead and others are not available anywhere. Many of these have been picked up by people and are being sold commercially as well. If you just want the item and have no desire to learn or build these, this page is not for you. Just buy them from somewhere and move on.
Some items have been reverse-engineered by me because they were unavailable. This is nothing new. Many things have been reverse-engineered by many people over the years, including 50000 games in MAME, custom parts for arcade PCBs, even complete Amiga computers such as the Amiga 500, Amiga 2000 and Amiga 1200.

Some items were made by other people and publicly released for free. Some have sadly been abandoned and those items became unavailable even though there was a demand for them. Those items are now available again. Some items are a great idea but not enough time was spent cleaning up the design or ironing out the problems, or the design was too big, or some parts being used were expensive or not available. In most cases there is always a part available that is much cheaper and does the same thing if you just put in some time and do some research. In a lot of cases I have solved those problems and re-done everything a better way in Eagle PCB and made it as small as possible because PCBs cost money and the smaller they are, the cheaper they are. This is the main theme on this page.... smaller, cheaper, better and more functional. In other cases an item here is purely a mirror backup of something that is no longer supported by the original designer but is in risk of becoming unavailable in the future, while in other cases it is merely here for its beautiful design and amazing complexity :- )

Build Levels are: Beginner --> Intermediate --> Advanced --> SMD Master --> PCB Pick'n'Place Machine

Gerbers can be sent to any PCB manufacturer such as Osh Park, PCBWay or JLCPCB or any of the dozens of Chinese PCB manufacturers and produced fairly cheaply. Bear in mind larger PCBs or larger quantities are better produced in China where manufacturing costs are greatly reduced. I recommend JLCPCB for that as they are the cheapest and provide very good service and quality. Osh Park was fairly cheap but has since become far too expensive for hobby projects.
Most PCB houses have no-bullshit instant online file upload method (simply upload zipped Gerbers or native Kicad/Eagle PCB files) and instant auto-generated PCBs that can be checked immediately. It's pretty amazing and very efficient and user-friendly. With Osh Park there's a small delay while they collect other designs and panelize everything but if you are making PCBs you should expect some delay anyway. If you want a super fast 1-day service you *WILL* pay for it. It is far better to wait a few days and get them at a much more reasonable price.

Note the 'purple' pics are auto-generated images provided by the Osh Park web site when PCB designs are submitted for manufacture. Green PCB pics were generated by Eagle V9.6

This page will be under construction until all the projects I'm interested in are listed here.

Item	Description	Image
3.	GBA1000 Motherboard rev 4 This is an A3000-spec replacement motherboard with a couple of enhancements that fits into an A1000 case and was designed by G.Braun (circa ~2006). The Osh Park web site does not render the board pics properly so my guess is this board is too complex for them to produce correctly. To give you an idea just how complex this is, look at the multiple pics showing the various gerber files. It is probably best to get them made in China in quantities >50 with a bulk collaboration of many people to get the price down to 2-figures, otherwise you're looking at 4-figures to make 1 ;-) It's pretty nice but really it isn't as good as an A1200 with a 68030 accelerator but I built this just for fun. I didn't bother to populate the serial port since it's non-standard on the A1000 (the GBA1000 designer didn't correct that error, urgghh!) and nowadays no one is using a serial port for anything. Build Level: PCB Pick'n'Place Machine	Size: 344.5mm x 314.0mm (4 Layer)
4.	GRAKA Rev 3.3 Picasso II-compatible Zorro-II Graphic Card (suits GBA1000 but will actually plug into any Amiga Zorro-II slot) by G.Braun Build Level: SMD Master	Size: 140.4mm x 123.8mm (4 Layer)
5.	TK-02 MC68060 Turbo Card by G.Braun (suits GBA1000) Build Level: SMD Master	Size: 147.0mm x 98.0mm (4 Layer)
9.	C64 Lumafix Used to reduce the vertical stripes produced by the C64 video chip. This actually isn't that useful and really does nothing. There are some good ways to get a better picture on the C64 but this isn't one of them ;-) Designed by e5frog Build Level: Intermediate	Size: 50.9mm x 27.3mm (2 Layer)
10.	C64 Switchless Quad Kernal Adapter Allows C64 to switch between 4 kernal images using the RESTORE key. An Easy Flash 3 cart does that and offers a lot more and is a better option IMO. Designed by bwack Build Level: Beginner	Size: 45.2mm x 22.9mm (2 Layer)
13.	Easy Flash 3 C64 cartridge Designed by 'skoe' (2012) Build Level: Advanced to SMD Master	Size: 83.6mm x 62.0mm (2 Layer)
22.	Amiga 500/1000/2000 14MHz 68000 + 4MB RAM + IDE A friend had an A1000 with a SupraDrive 4X4 which died and couldn't be fixed even after replacing every chip so this really nice board replaced it. I never had much luck with the 14MHz operation but it's great for adding 4MB RAM and an IDE HDD to an aging A1000. The original design didn't really fit in an A1000 so I have modified it to fit and made some other changes to fix some issues. RAM and IDE are not autoconfig. Requires boot disk to load drivers to enable the RAM and IDE. Original design by Matthias Heinrichs Build Level: Intermediate (no programming required, only soldering) Note: This is obsoleted by item 23 below.	Size: 83mm x 100mm (2 Layer)
23.	Amiga 500/1000/2000/CDTV 68000 + 8MB RAM + Autoboot IDE Similar to the above but with 8MB auto-config RAM and autoboot IDE. Originally designed for the CDTV by Matthias Heinrichs, but it works just fine in A1000, A500 and A2000 as well. Build Level: Advanced (Many SMD parts, JTAG programming etc)	Size: 80mm x 90mm (2 Layer)
24.	Amiga 500/2000 68020 + 16MB RAM + Autoboot IDE A more advanced version of the above with 25MHz 68020 + 16MB RAM and autoboot IDE. Original design by Matthias Heinrichs Build Level: Advanced (All SMD parts, JTAG programming etc)	Size: 100mm x 125mm (2 Layer)
25.	Amiga A3640/3660 68040/68060 Accelerator 68040/60 Accelerator for Amiga 3000 & Amiga 4000 Build Level: SMD Master	Size: 206mm x 98mm (4 Layer) Stock Level: 10
	More things I'm going to be adding eventually (no order, no time-frame).....
	EasyFlash3+SD2IEC-OLED This is an EasyFlash 3 cart with an added SD2IEC Dual AVR + OLED display but in full SMD. This is heavily re-designed and is a very advanced project. Currently Work-In-Progress at Rev 1.1 Build Level: SMD Master / PCB Pick'n'Place Machine
	Commodore 64 PSU (9VAC, 5VDC @ 3A) This is a PCB that drops into the standard original Commodore 64 angled-brick PSU that was very common in 240V PAL regions like Australia. It uses the original transformer and case. It has built in over-volt, over-current and thermal protection. This is custom designed by me. Currently Work-In-Progress at Rev 1.2 (note rev 1.0 is shown in the pic) Build Level: Intermediate
	Amiga 500 VIDIOT Hybrid Replaces the Commodore 390229-03 VIDIOT custom IC used on A500, A2000, A3000 etc. Build Level: Intermediate	Size: xxmm x xxmm (2 Layer)
	Amiga 500/2000 Kickstart Switcher #1 This can take 2 standard Kickstart chips and you can switch between them using a 6-second hold of CTRL-A-A. This one is a reversed copy of the 'Wilcom ROM Switcher' which I own. Note sure when it was originally made but probably late 80's. Build Level: Intermediate	Size: xxmm x xxmm (2 Layer)
	Amiga 500/2000 Kickstart Switcher #2 Similar functions to the above, but using on-board flash ROM for the kickstarts and converted to full SMD by me. Build Level: Advanced	Size: xxmm x xxmm (2 Layer)
	Amiga 1000 Kickstart Upgrade Replaces the silly 64k boot-ROM in the A1000 with a proper Kickstart ROM, even up to KS3.1.4 Build Level: Advanced	Size: xxmm x xxmm (2 Layer)
	Fast Load Cart for C64 #2 Same as the above but using full SMD parts. Build Level: Advanced	Size: xxmm x xxmm (2 Layer)
	A1200 LED board I got hold of a non-working A1200 in poor condition and brought it back to life but it was missing the LED board, so I made one. Build Level: Beginner	Size: xxmm x xxmm (2 Layer)
	A600 LED board Not sure if I'll do this, it's just an idea, same purpose as the A1200 board above but for A600. Build Level: Beginner	Size: xxmm x xxmm (2 Layer)
	5101 RAM adapter for Stern MPU-200 Same as the above but to suit Stern MPU-200 boards that use 2x 5101 RAMs. This single board plugs into 2 sockets to replace both 5101 chips. Build Level: Intermediate	Size: xxmm x xxmm (2 Layer)
	Commodore PET Repair Module This is a dead project from 2012 called the PetVet. It plugs into the 6502 socket on a faulty PET motherboard and makes it work again. Basically this replaces the CPU+RAM+ROMs on the motherboard. I have converted most of the parts to use SMD and made it much smaller than the original.... there's a theme here if you didn't notice.... smaller and cheaper ;-) Build Level: Intermediate	Size: xxmm x xxmm (2 Layer)
	Atari 2600 Joystick PCB Replacement Replaces the crappy and cheapo tact dome switches board inside the Atari 2600 joystick with a version using modern parts Build Level: Intermediate	Size: xxmm x xxmm (1 Layer)
	C64 Datasette Replacement This is a Guru re-work of the Tapuino, but made smaller so it costs less. The original design is way too big and 50% of the PCB is unused, resulting in a product that costs way more than it should. Back in the early 80's no one liked the datasette, and now 30 years later it's just a novelty item. People who are curious can now make one for very little cost. The add-on Arduino only costs $2 extra from China. Build Level: Advanced	Size: xxmm x xxmm (2 Layer)
	more coming soon.....