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Nissan 200SX - SR20DET with VEMS - Östersund, Sweden http://lh5.ggpht.com/_V2yrN18mN60/S_PU7N5VWnI/AAAAAAAAACY/0e80nRFl_Lk/s640/DSC00061.JPG Contents: MembersPage/Larsa/VEMSpictures MembersPage/Larsa/Firmware ----------------------------------------------------------------- '''Tachometer requires lower than 50% duty''' Orginal tachometer has a dutycycle of 33/255 and doesnt like signals other than that. * Since 1.1.77 (see GenBoard/UnderDevelopment/FirmwareChanges ) '''very low (1-5) tach_div value adjusts duty''', (than freq is nonadjustable, same as if the default 16 was used). You can try 4 for 4/32 (or 3 for 3/32 or 5 for 5/32) duty * is that common for Nissan 200SX or most Nissan ? oscilloscope picture of tach signal [1000rpm 2ms/div] http://lh6.ggpht.com/_V2yrN18mN60/S_PS4XTBJeI/AAAAAAAAABQ/92vv6KwCRuQ/s640/1000rpm%202ms.JPG [1000rpm 10ms/div] http://lh6.ggpht.com/_V2yrN18mN60/S_PS4qSA1vI/AAAAAAAAABU/LK_cLQraTAA/s640/1000rpm%2010ms.JPG [3000rpm 2ms/div] http://lh3.ggpht.com/_V2yrN18mN60/S_PS5fHudxI/AAAAAAAAABY/3n4bFhhVjsE/s640/3000rpm%202ms.JPG
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