405/819 Line STANDARDS CONVERTER
Hedghog L is a homebrew standards converter. From a 625 line input it will generate 405 line or 819 line standards . It is coupled with a versatile programmable modulator that uses two MC44BS373.
This converter uses the Lattice iCE40HX1K FPGA. When compared to the FPGA's used in previous Hedghog's it is very small. The standards converter had to be heavily pruned back in order to get it to fit within the iCE40HX1K. While the standard of the output isn't up to the standard of previous Hedghog's it still gives a reasonably good conversion. In order to get more functionality multiple program images are stored in flash memory and loaded as required.
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.
28.5 to 56.25 MHz step 15.625 KHz
56.25 to 112.5 MHz step 31.250 KHz
112.5 to 225 MHz step 62.500 KHz
225 to 450 MHz step 125 KHz
450 to 900 MHz step 250 KHz
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.