If you wanted to do what I do, that would be a 6 or 7.5V Zener and then a pair of 10kOhm to ground with the a0 connected at the middle of those two resistors 10k resistors seem to behave themselves ok near to a0 analog to digital inputs of the arduino. With 22 to 27 V pairs of car batteries in a solar project, I subtract a fixed V through a zener and then have a resistor potential divider below that. Also some users might have updated stators / charging systems that will differ. Some users will have different types of batteries that have different on/off values. I might be also adding in a fuel gauge, haven't worked that part out yet though.īluejets: I understand you're thought process but this is for users that know and understand what values their battery should be at. Also, the speedo doubles as a trip meter. I didn't want to deal with anything mechanical, so I went with hall effect. 2mph accuracy up to 120 mph (above top speed of bike). Mulungu: I have a RCT (clock), ambient temperature, compass, speedometer (hall effect), and this will be the last piece (battery / charging system monitor). Using a 1/4 voltage divider, I'll still get. Robin2: Normal value for the battery is 12.6v (vehicle off) and can get up to 14.5v when the vehicle is on. Wow, lots of replies, and I don't want to make anyone feel bad, but I've already thought / done everything suggested. Pretty easy to do with an LED and a zener.
#Motorcycle battery meter generator#
So as Robin2 says, a big red warning light, to monitor generator is the best you will do.īattery you'll have to test with a different system as suggested. There were quite a few engines blown up because of that one. Used to happen back in the 60's when young blokes would rip out the oil warning light and fit an oil gauge. You will find yourself constantly needing to check and decipher the reading as to whether it is good or bad and as shown in your first example with battery voltage going to 16v (never happen on a healthy system)In most instances a rider may never know what they are looking at but a big flashing red warning light definetely means something is not right. (end up riding up the back end of a truck) In your case, a warning light, preferrably one that flashes brightly (red normally accepted as being on the immediate to do list) would do much much better than a digital readout one has to constantly check for fault levels. In my experience, any warning of impending problem must be associated with something that grabs your attention.
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