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IMPORTANT: enter the case-INsensitive alphabetic (no numbers) code AND WRITE SOME SHORT summary of changes (below) if you are saving changes. (not required for previewing changes). Wiki-spamming is not tolerated, will be removed, so it does NOT even show up in history. Spammers go away now. Visit Preferences to set your user name Summary of change: With this solution you can fast open low z injectors and fast close(30V flyback) but with 30% pwm(low energy losses on flyback transistor). Schematic: http://carphotos.cardomain.com/ride_images/1/2822/1741/7053370240_large.jpg * diode : I use by500-1000 (cheap, fast) ** I put zener diode on vems board 30V transient protection diode (1k5E30 diode from WebShop) ** so when pwm is activated, current flow throo active flyback, but when injector needs to close, 30V high voltage flyback inside VEMS does the clamping mcell9 yes, the sch on your wiki page is drawn in a confusing way mwfire i have pcb for smd componets (1206) mwfire but pcb is trial to made new Same schematic, but drawn in a slightly confusing way: http://img359.imageshack.us/img359/5412/flybackln2.jpg When pwm last, flyback voltage is 0.3-1.5V(depending of schottky diode and mosfet(irf9540)) http://img516.imageshack.us/img516/5109/voltagevs1.jpg Bad thing is, you must have one of thise flyback for every injector. PCB http://hosting01.imagecross.com/image-hosting-07/49841.jpg Assembled board(missing 2 zener diodes, i bought two too few) http://hosting01.imagecross.com/image-hosting-07/4062.jpg That board was tested on lpg injectors(landi renzo, 0.9ohm) and working well. Optional: Add document to category: Wiki formatting: * is Bullet list ** Bullet list subentry ... '''Bold''', ---- is horizontal ruler, <code> preformatted text... </code> See wiki editing HELP for tables and other formatting tips and tricks.