Shared Projects

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.

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.

I2C_RGB_Encoder breadboard friendly corrected hole size for pins

Yet another attempt…no leads under QFN