Shared Projects

Adapter for Mini SAM to a 2.54mm DIP spaced breakout.

TheLittleEngineers.org-2732-TOFROM-2532-GCC-ECS-0001.2-09.APRIL.2019-02.JUNE.2019(EAGLE). 2732 <–> 2532 Adapter - The following text is from the repository originally uploaded by Ricardo Quesada at this url: https://github.com/ricardoquesada/2732-to-2532

This product is intended to allow a 2732 EPROM to be placed into a 2532 EPROM socket or a 2532 EPROM to be placed into a 2732 EPROM socket. Fitting I.C. pins for IC1 and a socket for IC2 allows a 2732 to be plugged into a 2532 socket, whilst fitting I.C. pins for IC2 and a socket for IC1 allows a 2532 to be plugged into a 2732 socket.

The 2732 has an output enable signal in addition to the chip enable signal. In most cases, the output enable signal can simply be connected to ground. However, it may sometimes be desirable to connect the ouput enable signal to the chip enable signal. Jumpers JP1 and JP2 allow these settings.

If JP1 is fitted, then the ouput enable will be connected to the chip enable. If JP2 is fitted, then the ouput enable will be connected to GND. JP1 and JP2 should NEVER be fitted at the same time - one or the other, but not both. In most cases, fitting JP2 will suffice. All of GIMEchip.com’s designs are created for the benefit of the vintage computing community as a whole. Although we copyright all of our works and retain all rights to them, we also don’t mind sharing. If you wish to produce and distribute this product, please contact us at: * [email protected]

In most cases, permissions will be granted Royalty Free. I said we like to share, didn’t I?

If you would like to include this product as part of your website, feel free to do so, as long as all documentation remains intact. We do ask that you inform us that you have included this file on your site so our ego’s may get a bit larger :-)

Enjoy - John Eric & John Robert (J.R.), Son & Father

I have updated the GCC-0001.0 (v1.0) product described above to GCC-0001.1 (v1.1) and placed a repository for the 1.1 version here: https://github.com/TheLittleEngineers/2732-tofrom-2532

The original version was created by my nephew and his father (my brother) with minor input from me. The 1.1 version made minor changes, specifically a cleaner silkscreen, mitered tracks and a CC BY-SA 4.0 License. I did not fork Ricardo Quesadas repository for that minor update, but rather simply made a new repository.

I have now updated GCC-0001.1 (v1.1) to GCC-0001.2 (v1.2), once again making only minor changes. These changes are to the EAGLE library to improve appearance. I decided, at this time, to fork Ricardo Quesadas repository for this version so that more people might find it and have access to the CC BY-SA 4.0 Licensed version.

Enjoy - Robert “The R.A.T.” Allen Turner, 02 June 2019.

This repository resides at: https://github.com/TheLittleEngineers/2732-to-2532

There is an OSHPark Project Page at this url: https://oshpark.com/shared_projects/kX8qkKjv

YardMaster i2c adaptor.

This card replaces the Feather mcu with a SparkFun sx1509 i2c IO board. This allows access to the YardMaster via i2c from another mcu.

UNTESTED as on June 2, 2019!!!

Yard Master RFID tracker.

This card connects an Adafruit Feather M0 Wifi to an Adafruit TCA9548A i2c mux. It additionally has connectors for 8 Adafruit PN532 RFID readers. This allows monitoring of RFID tag presence in 8 separate locations. It is intended for tracking rolling stock in a model railroad setup.

TheLittleEngineers.org-27C512E-TO-2532S-V1R1.20.APRIL.2019-01.JUNE.2019(KiCAD). TheLittleEngineers.org-27C512E-TO-2532S-V1R1.20.APRIL.2019 27C512 E.P.R.O.M. TO TMS2532 SOCKET CONVERTER. © 20 April 2019 and 01 June 2019 by: Robert Allen Turner http://www.TheLittleEngineers.org/ https://github.com/TheLittleEngineers

This product is intended to allow a 27512 or 27C512 EPROM to be placed into a TMS2532 EPROM socket. The 27512 is divided into 16 banks of 4Kbytes via the four jumpers at the bottom of the socket.

Released under a Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) License, 01 June 2019 In Memory of my Father, Robert Embry Turner, 1945 - 2019. Rest In Peace. I LOVE YOU DAD!

Archive name: “TheLittleEngineers.org-27C512E-TO-2532S-V1R1.20.APRIL.2019”

This is an update to the “TheLittleEngineers.org-27C512E-TO-2532S-V1R0.20.APRIL.2019” repository which resides at this url: https://github.com/TheLittleEngineers/27C512E-TO-2532S-V1R0 This update was made due to the fact that I was not very pleased with the initial Printed Circuit Boards that resulted from the original design. Although functional, the production of the Printed Circuit Boards was inconsistent between different manufacturers. This was due to a problem in the dimension layer of the original design and so I have created this new design to eliminate the inconsistencies.

This version should provide much better results.

Please note: This is derived from an original design by “Little” John Eric and/or his father “Big” John Robert (J.R.) by “Uncle” Robert Allen. It should be thoroughly scrutinized and verified prior to actual use of any kind. DISCLAIMER: The following article is provided for informational purposes only. Any attempt to modify your computer without the proper skills to do so may void your computer. Any attempt to modify your computer without unplugging it first may void you. This Information is provided “as-is” with no guarantee of fitness for any purpose, either explicit or implied. We disclaim any and all responsibility for losses incurred through the use of this information. By using this information, you are deemed to have accepted these conditions of use, and you agree NOT to sue us. CLARIFICATION: The above disclaimer states as plainly as possible that if you decide to make use of any of the information contained within this document that you do so at your own risk. Designing hardware for the CoCo (ColorComputer) and other vintage hardware is a hobby of ours and is not motivated by any desire of profits. As this is a not for profit venture, obviously we can’t afford not to disclaim the use of this information.

The GitHub home of this project is available at the following url: https://github.com/TheLittleEngineers/27C512E-TO-2532S-V1R1.20.APRIL.2019

This design is available at OSHPark with the following urls: https://oshpark.com/shared_projects/JmUiHyi1 (EAGLE .brd) https://oshpark.com/shared_projects/4RvjjYdM (KiCAD .kicad_pcb) Note that the KiCAD version has been imported using the EAGLE import function of the Version 5.x of KiCAD. As such, it may be potentially problematic.

TheLittleEngineers.org-27C512E-TO-2532S-V1R1.20.APRIL.2019-01.JUNE.2019(EAGLE). TheLittleEngineers.org-27C512E-TO-2532S-V1R1.20.APRIL.2019 27C512 E.P.R.O.M. TO TMS2532 SOCKET CONVERTER. © 20 April 2019 and 01 June 2019 by: Robert Allen Turner http://www.TheLittleEngineers.org/ https://github.com/TheLittleEngineers

This product is intended to allow a 27512 or 27C512 EPROM to be placed into a TMS2532 EPROM socket. The 27512 is divided into 16 banks of 4Kbytes via the four jumpers at the bottom of the socket.

Released under a Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) License, 01 June 2019 In Memory of my Father, Robert Embry Turner, 1945 - 2019. Rest In Peace. I LOVE YOU DAD!

Archive name: “TheLittleEngineers.org-27C512E-TO-2532S-V1R1.20.APRIL.2019”

This is an update to the “TheLittleEngineers.org-27C512E-TO-2532S-V1R0.20.APRIL.2019” repository which resides at this url: https://github.com/TheLittleEngineers/27C512E-TO-2532S-V1R0 This update was made due to the fact that I was not very pleased with the initial Printed Circuit Boards that resulted from the original design. Although functional, the production of the Printed Circuit Boards was inconsistent between different manufacturers. This was due to a problem in the dimension layer of the original design and so I have created this new design to eliminate the inconsistencies.

This version should provide much better results.

Please note: This is derived from an original design by “Little” John Eric and/or his father “Big” John Robert (J.R.) by “Uncle” Robert Allen. It should be thoroughly scrutinized and verified prior to actual use of any kind. DISCLAIMER: The following article is provided for informational purposes only. Any attempt to modify your computer without the proper skills to do so may void your computer. Any attempt to modify your computer without unplugging it first may void you. This Information is provided “as-is” with no guarantee of fitness for any purpose, either explicit or implied. We disclaim any and all responsibility for losses incurred through the use of this information. By using this information, you are deemed to have accepted these conditions of use, and you agree NOT to sue us. CLARIFICATION: The above disclaimer states as plainly as possible that if you decide to make use of any of the information contained within this document that you do so at your own risk. Designing hardware for the CoCo (ColorComputer) and other vintage hardware is a hobby of ours and is not motivated by any desire of profits. As this is a not for profit venture, obviously we can’t afford not to disclaim the use of this information.

The GitHub home of this project is available at the following url: https://github.com/TheLittleEngineers/27C512E-TO-2532S-V1R1.20.APRIL.2019

This design is available at OSHPark with the following urls: https://oshpark.com/shared_projects/JmUiHyi1 (EAGLE .brd) https://oshpark.com/shared_projects/4RvjjYdM (KiCAD .kicad_pcb) Note that the KiCAD version has been imported using the EAGLE import function of the Version 5.x of KiCAD. As such, it may be potentially problematic.

Fron lights for Pegaso truck

Terminal block to breadboard adapter.

Optical encoder reader with SPI interface based on LSI Computer Systems LS7366R.

Pyramid IOT thing.

A backlit commemorative plaque thing.

Preampv4.01

VoltroveMIC1557 is now available with RPP! It’ll auto fire in a reverse polarity condition, but won’t affect anything.

Proteus project file: https://drive.google.com/open?id=10_gWsq2oYxhuZroiCzH90-YV88kyd1HZ

Input range = 2s-4s. Switching Frequency = 280hz

“How low can I build?” You want to build higher and use the voltage. That being said, 2s = 0.15 3s = 0.2 4s = 0.3

Board has markings for 0, W(wiper) and 100 pins on the popular 93 series pots. There’s pins behind the 0 and 100 on the pot and the wiper is in the middle.

Fire switch should be wired between BAT+ and VIN+.

License: Free for all! Build ‘em, sell ‘em, whatever you want. :)

I recommend getting 2oz boards if possible, but 1oz would work.

Digikey cart share:

https://www.digikey.com/short/p454vb

Digikey cart is setup for enough components for 3 PCBs.

The top and bottom stencil files are in the gerber zip. Simply download the gerbers and order stencils from OSHStencils or wherever else you like.

Feedback is welcome.

You can reach us @ mark at voltrove dot com

Power supply

Monitors current, voltage and temperature via I2C. LTC4151 datasheet, PDF.

BoM: R1 2512 0R004 R1B 2512 0R004 R2 0603 100k NTC R3 0603 47k R4 0603 1k5 C1 0603 1uF 100V C2 0603 10uF 25V X1 22-05-7038-03 IC1 MSOP10 LTC4151CMS#PBF Adjust as required

Order 2 OZ Copper! PWM Dimmer board. See www.RV-Project.Com/projects/4dimmers.php for details, construction documentation, and Bill-of-Materials.

Andre Vigano Opendrop V3 PCB

Order 2 OZ Copper! PWM Dimmer board. See www.RV-Project.Com/projects/4dimmers.php for details, construction documentation, and Bill-of-Materials.

Order 2 Oz Copper!

Circuit board for the self contained PWM dimmer. See www.RV-Project.com/projects/4dimmers.php for details, including build instructions and bill of materials.

Project: https://github.com/rfrht/FT991A-PAT

This project is a remix of OE2DOR’s perfect and neatly crafted FT-991A Panadapter board.

The final objective is to actually embed a RTL-SDR inside a FT-991 (or FT-991A), without drilling holes, external cables, connectors or whatsoever: The FT-991A sports a USB hub (which feeds the sound card and the CAT interface). By replacing the existing 2-port USB hub chip with a 4-port variant (same SMD footprint and compatible pinout), the SDR will be installed in the radio, and it will be exposed to the computer via the existing USB port, conveniently routed through the radio’s USB hub. So, plug the radio’s USB port and the computer will see three devices: the virtual sound card, the CAT port and the SDR.

This fork adds on-board latch control, by using a AND gate with two inputs that controls a RF switch: The IF signal is only connected to the SDR if both signals (on my project, a SDR GPIO signal and the RX9 signal from radio’s Main Unit) are present. Otherwise, the SDR is left isolated to the ground and no signal is tapped.