Hedghog IV is a homebrew standards converter based around a EP2C5T144C8N FPGA. From a 625 line input it will generate 405 line video. It is coupled with a versatile programmable modulator that uses two MC44BS373. It is similar to the HEDGHOG III but in addition to the functions of the HEDGHOG III it also can store a single image. The image can be displayed in either 4:3 or 5:4 aspect ratios. On this page you will find the files required to build it.
All material including Downloads on these pages are provided 'as is' without warranty of any kind, either expressed or implied.
All Resistors, Capacitors and Inductors are 0805 size.
All Capacitors are ceramic multilayer types.
Where given manufacturers part numbers are given as examples alternative parts may also suit.
The PCB is double sided and measures 100 mm X 89.5 mm.
Link to uploaded Gerber files on PCBWay
Menu description (.pdf)
Circuit diagram (.pdf)
Component list (.pdf)
Component layout top (.png)
Component layout bottom (.png)
Front and rear panel legends (.pdf)
FPGA program file (.jic)
Microcontroller program file (.hex)