Although it's in spanish, I think you can get an idea of how it works. To put it simple, it's a pulse generator controlled by a potentiometer, whose output goes directly to the BUSRQ pin at the Z80. The pot controlls the speed.
Although it's in spanish, I think you can get an idea of how it works. To put it simple, it's a pulse generator controlled by a potentiometer, whose output goes directly to the BUSRQ pin at the Z80. The pot controlls the speed.
Comments
http://microhobby.speccy.cz/mhf/094/MH094_24.jpg
This schematic belongs to an article in the Microhobby Magazine, that spans for six pages:
http://microhobby.speccy.cz/mhf/094/MH094_22.jpg
http://microhobby.speccy.cz/mhf/094/MH094_23.jpg
http://microhobby.speccy.cz/mhf/094/MH094_24.jpg
http://microhobby.speccy.cz/mhf/095/MH095_26.jpg
http://microhobby.speccy.cz/mhf/095/MH095_27.jpg
http://microhobby.speccy.cz/mhf/095/MH095_28.jpg
Although it's in spanish, I think you can get an idea of how it works. To put it simple, it's a pulse generator controlled by a potentiometer, whose output goes directly to the BUSRQ pin at the Z80. The pot controlls the speed.
But what means: KPF by the condensators?
Micky
it's "Kilo Pico Farad" which is just a (stupid) way of saying nanofarad
Thanks.
Micky
http://velesoft.speccy.cz/other/zpomalovac_her.jpg