Electronics

DELL Server Power Supply AA233300 repair These power supplies are available under a number of different model numbers / brands. However they are all really the same (only minor mechnical outside differences). This is great for us as it means that we can use them to repair other models if needed. The DS550-3 The DS550-3 is the actual manufacturers model number for this supply. It was manufactuered by Emerson, However it appears that the same supply is also manufactured by Artesyn Embedded Technologies....

NMEA 2000 - Part 1 NMEA 2000 is the new standard that is being rolled out in boating (well has been for a while). This standard is notable as a replacement for NMEA 0183, as it resolves the issues 0183 faced. NMEA 2K is based on the CAN BUS communications platform, this is an awesome as it resolves the main issue of connecting multiple devices on a single bus. Also included in the specifications for the NMEA 2K standard is two styles of wiring (Mid and micro size) with matching connectors....

eBike monitor The eBike monitor concept is to provide a HUD for the energy information for eBikes. The unit consits of a small colour LCD screen that can be mounted on the handlebars or whereever you wish, and a monitoring pcb that is installed inside of the battery pack. Concept The system works by having the battery monitoring and statistics calculations performed on a small pcb that is mounted inside of the battery pack....

The HP P4XX The HP P4XX series of RAID controllers are HP’s first PCIe SAS/SATA Raid controllers, and personally I have found them to work excellently for use in my servers (G5/G6 servers). The cards are upgradable to use a 512MB cache and also have a backup battery for the cache (to prevent data loss in power outage). This battery backup unit is my only issue with these raid controllers…...

SPI Flash ics SPI Flash chips are a fantastic way to store a medium amount of information for a microcontroller when you dont wish to impliment a whole filesystem layer. This is great for when you do not wish to use a large ram footprint (no large buffer needed!). They can provide relatively high density storage for a low cost, and enable high speed data storage. This page will be updated in future, as my code progresses....