A little help with gauge reversal circuit please. Hi folks. Hope you can help. I have an antique 1968 gauge and have replaced the level sender with new which of course is incompatible as the originals are no longer made. I know this has been discussed before - http://forum.allaboutcircuits.com/showthread.php?t=29644 (many thanks to Jack-K & SgtWookie) All was going well using an LM2904 but as I needed more current (about 100mA) I added an output PNP, but this has led to an unwanted offset of 0.8V which means I cannot get close to zero. I need to get to 0.5v and am at present on about 1.3V minimum. Is there a way to increase current handling from the LM2904 without adding an offset or do I need another op amp? I'm fairly new to this level of electronics and am self taught but enjoying it, so any help would be appreciated. Many thanks.