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Jeroni Paul projects

HTPC / Arcade project

• VGA to TV/Arcade and other cable schematics: schematics to interface VGA to Scart, VGA to Arcade, Jamma to Scart or Scart to VGA. These interfaces provide optimal picture quality on tube TV sets and Arcade monitors and avoid quality loses in conversions or scalings, WinModelines can be used to set the proper refresh rates for TV/Arcade.
• WinModelines: a Windows tool to add custom resolutions and refresh rates into ATI, NVidia, Matrox and 3Dfx video card drivers.
• RC800 - remote control plugin: a plugin for Girder, ARC2000 and HIP that allows you to use a PCI TV capture card remote control to control your PC. For BT8x8/BT8x9/CX2388x/SAA713x/SAA7146 based cards.
• Automatic PC fan speed regulation: easy way to turn a standard fan into a temperature regulated one with just a few components. This is a safe and cheap way to quiet a PC.

Electronics

• Nixie clock I − Vintage electronics: the charming neon light in a clock display. This project was made possible by Estebitan and Miguel Gimenez who provided nice tubes and valuable old electronic chips - Thanks!
• Programmable timer: my first digital electronics project designed using 4000 CMOS series chips. This device can be programmed with its display and buttons to turn on and off an electrical appliance at set times.
• Automatic switch for audio amplifier: this simple circuit switches the power to an audio amplifier automatically depending on the presence of audio in its input. It has a delay of one minute of silence to turn off. It was designed to replace a manual switch in an audio amplifier.
• Analog ESR meter: this section contains schematics and notes to build a working ESR meter for testing electrolytics. This material courtesy of Gary Woods was exposed in his web page but is no longer available.
• TDA3810 stereo simulator: an error exists in the TDA3810 Philips datasheet that makes it behave incorrectly in pseudo-stereo mode. Here is the error and its solution.
• Internal 56k PCI schematics: these diagrams show the line interface used in two models of Conexant internal 56k PCI modems.

Misc

• Metronic twinbox evo 2 receiver (441525) and clones: improved its firmware: better handling of widescreen (16:9) broadcasts, updated transponder lists for Astra (19.2°E), Hotbird and Hispasat and corrected some Spanish texts. Note: for terrestrial tuner NhPH1/3.
• Kaon receiver: encoding videos for playback on STB: tutorial explaining how to encode and transfer videos from PC to set top box hard disk for a proper playback. Tested on Kaon S7 and KVR-1000 but may work on other models as well.
• Kaon KVR-1000TS+ DTV/SAT receiver: reboot problem during startup: at startup this set top box reboots several times, here is the cause and possible solutions.
• Donnerzeien light timer: analysis, disassembly and schematics of a Donnerzeien stairway/garage light timer relay.
• Documents and manuals: exotic documentation not available anywhere else.
  • Single channel amplifier array Ikusi SZ-5/B
• Minesweeper for MS-DOS: the classic Minesweeper game brought to MS-DOS. This game also runs under Windows and is available in Catalan, Spanish, English, French and German.
• Useful tables: resistor and capacitor colour codes, labeling standards and typical ESR values for electrolytics.

Contact me at jeroni_paul (the usual symbol) hotmail.com