github.com/bkw777/TPDD_Cable

tandy.wiki/TPDD

78xx/78Mxx power supply. 1Amp max when potted (2A max if 2Oz copper used). Instructions and BoM for creating a 3.3V @500mA power supply are at: http://www.rv-project.com/tips/level1.php

Now with address header for 4MB operation

Labjack 42 TC board, 1 of 2

Labjack 42 TC Board, Top

16x2 OLED/VFD display shield for Adafruit Metro Mini 328 and DS3231 Precision RTC Breakout.

Tested with: Winstar WEH001602A and Noritake CU16025-UW6J

Copyright and Disclaimer

Copyright: René Richard

https://github.com/db-electronics/phoenix-audio-adapter-kicad

This documentation describes Open Hardware and is licensed under the CERN OHL v. 1.2.

You may redistribute and modify this documentation under the terms of the CERN OHL v.1.2. (http://ohwr.org/cernohl). This documentation is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY AND FITNESS FOR A PARTICULAR PURPOSE. Please see the CERN OHL v.1.2 for applicable conditions

Phoenix Audio Adapter

I didn’t want to have a bunch of stripped wire connectors on my Extron Crosspoint 12x4 video switch so I decided to make this simple adapter which allows a stacked RCA stereo audio jack (Digikey# CP-1435-ND) to be interfaced to a standard 5pin 3.5mm Phoenix connector.

Output Differences

The Extron Audio output wiring is different than the input wiring. There are 2 PCBs in this project. Be sure to use the output PCB for your outputs!

Phoenix Adapter

This folder contains a PCB which connects L- and R-. You “can” use this PCB for all your needs, provided you cut the R- and L- traces for outputs. If you forget to cut the traces it’s probably not a big deal since there is internal resistance (50 ohms or so) in line which each output. Obviously best if they are cut, but not catastrophic by any means.

Phoenix Adapter Output

This folder contains a PCB which leaves L- and R- floating.

Copyright and Disclaimer

Copyright: René Richard

https://github.com/db-electronics/phoenix-audio-adapter-kicad

This documentation describes Open Hardware and is licensed under the CERN OHL v. 1.2.

You may redistribute and modify this documentation under the terms of the CERN OHL v.1.2. (http://ohwr.org/cernohl). This documentation is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY AND FITNESS FOR A PARTICULAR PURPOSE. Please see the CERN OHL v.1.2 for applicable conditions

Phoenix Audio Adapter

I didn’t want to have a bunch of stripped wire connectors on my Extron Crosspoint 12x4 video switch so I decided to make this simple adapter which allows a stacked RCA stereo audio jack (Digikey# CP-1435-ND) to be interfaced to a standard 5pin 3.5mm Phoenix connector.

Output Differences

The Extron Audio output wiring is different than the input wiring. There are 2 PCBs in this project. Be sure to use the output PCB for your outputs!

Phoenix Adapter

This folder contains a PCB which connects L- and R-. You “can” use this PCB for all your needs, provided you cut the R- and L- traces for outputs. If you forget to cut the traces it’s probably not a big deal since there is internal resistance (50 ohms or so) in line which each output. Obviously best if they are cut, but not catastrophic by any means.

Phoenix Adapter Output

This folder contains a PCB which leaves L- and R- floating.

Copyright and Disclaimer

Copyright: René Richard

https://github.com/db-electronics/phoenix-audio-adapter-kicad

This documentation describes Open Hardware and is licensed under the CERN OHL v. 1.2.

You may redistribute and modify this documentation under the terms of the CERN OHL v.1.2. (http://ohwr.org/cernohl). This documentation is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY AND FITNESS FOR A PARTICULAR PURPOSE. Please see the CERN OHL v.1.2 for applicable conditions

Phoenix Audio Adapter

I didn’t want to have a bunch of stripped wire connectors on my Extron Crosspoint 12x4 video switch so I decided to make this simple adapter which allows a stacked RCA stereo audio jack (Digikey# CP-1435-ND) to be interfaced to a standard 5pin 3.5mm Phoenix connector.

Output Differences

The Extron Audio output wiring is different than the input wiring. There are 2 PCBs in this project. Be sure to use the output PCB for your outputs!

Phoenix Adapter

This folder contains a PCB which connects L- and R-. You “can” use this PCB for all your needs, provided you cut the R- and L- traces for outputs. If you forget to cut the traces it’s probably not a big deal since there is internal resistance (50 ohms or so) in line which each output. Obviously best if they are cut, but not catastrophic by any means.

Phoenix Adapter Output

This folder contains a PCB which leaves L- and R- floating.

This is a simple 2 transistor flashing circuit designed to introduce a child to soldering. Unfortunately the pad sizing and spacing were slightly too small for a first introduction to soldering, but will probably serve well for someone who has soldered a couple of projects and looking for a more challenging project to improve their skills.

Particular areas likely to cause difficulty are soldering Q1 and Q2, where the chance of a solder bridge is high.

BOM

• D1, D2: 5mm Light Emitting Diode
• R1, R4: 470 Ohm 1/4W Resistor
• R2, R3: 22K Ohm 1/4W Resistor
• C1, C2: 30uF Capacitor
• Q1, Q2: 2N2222 Transistor

Note: The flashing speed is currently too fast. This could be improved by increasing the size of R2 and R3, or increasing the size of C1 and C2. Increasing the resistor size is likely to be easier, with 100K likely a reasonable size (testing to follow)

Circuit Diagram: To be uploaded

DO NOT USE. Replaced by DRO Sensor Jumper 2768 v1.0a.

DO NOT USE. Replaced by Touchscreen DRO v1.01a.

diy eval board for buck/boost converter

This is part of the PS1 Flash Bios project.

It’s an easy way to swap the PS1’s bios. All PS1 revisions with 32 pin BIOS are supported.

Order this board in 0.8mm thickness!

The (A) variant is a simple adapter that connects the pinout of the SST39VF040 TSOP flash memory with the pinout of the BIOS. The memory must be written to beforehand. For this I also made a flash adapter for the TL866.

For the (A) variant you need:

• PS1_Flash_Bios_(A) board
• or PS1_Flash_Bios(A)without_castellation board
• SST39VF040_to_TL866_Adapter board
• SST39VF040 Flash IC
• 10K resistor 0603 (or solder bridge)
• two 1x16 pinheaters

without_castellation: The version “without castellation” has no castellated vias. These have to be cut yourself. Some board manufacturers charge extra for castellation.

This is part of the PS1 Flash Bios project.

It’s an easy way to swap the PS1’s bios. All PS1 revisions with 32 pin BIOS are supported.

Order this board in 0.8mm thickness!

The (A) variant is a simple adapter that connects the pinout of the SST39VF040 TSOP flash memory with the pinout of the BIOS. The memory must be written to beforehand. For this I also made a flash adapter for the TL866.

For the (A) variant you need:

• PS1_Flash_Bios_(A) board
• or PS1_Flash_Bios(A)without_castellation board
• SST39VF040_to_TL866_Adapter board
• SST39VF040 Flash IC
• 10K resistor 0603 (or solder bridge)
• two 1x16 pinheaters

without_castellation: The version “without castellation” has no castellated vias. These have to be cut yourself. Some board manufacturers charge extra for castellation.

This is part of the PS1 Flash Bios project.

It’s an easy way to swap the PS1’s bios. All PS1 revisions with 32 pin BIOS are supported.

Order this board in 1.6mm thickness!

The (A) variant is a simple adapter that connects the pinout of the SST39VF040 TSOP flash memory with the pinout of the BIOS. The memory must be written to beforehand. For this I also made a flash adapter for the TL866.

For the (A) variant you need:

• PS1_Flash_Bios_(A) board
• or PS1_Flash_Bios(A)without_castellation board
• SST39VF040_to_TL866_Adapter board
• SST39VF040 Flash IC
• 10K resistor 0603 (or solder bridge)
• two 1x16 pinheaters

without_castellation: The version “without castellation” has no castellated vias. These have to be cut yourself. Some board manufacturers charge extra for castellation.

This is part of the PS1 Flash Bios project.

It’s an easy way to swap the PS1’s bios. All PS1 revisions with 32 pin BIOS are supported.

Order this board in 1.6mm thickness!

The (B) variant consists of three boards. The (B1) board is the circuit board that is soldered into the PS1. There is a 32 pin connector on it. The (B2) board is then the counterpart to it. The matching 32-pin connector is on the underside and the SST39VF040 TSOP memory is on top. The memory is pluggable and can be removed and re-flashed externally at any time. For external flashing, there is also the (B3) board, which is intended for the TL866 programmer and has the appropriate socket.

Attention 1!

The B variant cannot be used together with the PS1Digital, as the boards are too high and do not fit under the PS1Digital Board.

Attention 2!

The DF12 (3.0) -32DS-0.5V is no longer manufactured. You have to find old stocks or an alternative of the same construction.

For the (B) variant you need:

• PS1_Flash_Bios_(B1) board
• or PS1_Flash_Bios(B1)without_castellation board
• PS1_Flash_Bios_(B2) board
• PS1_Flash_Bios_(B3) board
• SST39VF040 Flash IC
• DF12(3.0)-32DP-0.5V
• DF12(3.0)-32DS-0.5V is no longer produced!
• 10K resistor 0603 (or solder bridge)
• two 1x16 pinheaters

without_castellation: The version “without castellation” has no castellated vias. These have to be cut yourself. Some board manufacturers charge extra for castellation.