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Laying Out the Board
Preparing a Schematic
Circuit Board Design Class
I made this twice and it didn't work. Has anyone made it and had it work hooked up to a charger?
I remade this project and it still doesn't work. Has anybody had success. The demo on the you tube video doesn't duplicate conditions for charging a battery since it only connects to a light.
I made this project. My relay did not have the same footprint, so I could not use the layout of components the way it showed on your printout. I have double checked and it does follow the schematic. I am having difficulty getting mine to work right. I can turn the pot and get it to cut out or cut in, but can't seem to find a place that shuts off at a certain charge. I also had a problem with my relay buzzing when my pot was in a position where it was transitioning between off and on. I was working with it on my workbench with a 600ma wall charger hooked to a 7.5 ah gel cell. (maybe the low current capacity of the wall charger was causing this) Unfortunately I don't have a big "car sized" battery in a stage of discharge so I can't test it with a big charger.
I made this and it works pretty good. Reaction to nonferrous metals seems to be the same as ferrous. I was hoping it would be more sensitive to small bolt-like objects (maybe I could use it for when I drop a bolt in the grass) I tried it with a coil I made with like 75 turns and after I bumped the capacitor up to like .05 mfd I, played around with pulse number and got it working. No increase in sensitivity.
Getting Started With Electronics
I have this nice coil already made. 75 windings of enamel wire. I tried it yesterday, but was getting numbers in the serial monitor in the 600 range. I am at the airport heading out on vacation so it will be a while till I get back to it.
Is there any advantage to making a coil with many more windings. I have seen in one of the comments that I would have to change the value of the capacitor. Would more windings make it more sensitive?As far as the code is concerned, I don't know enough about coding to begin to try to improve on yours. I do however have a friend who programs for a living, maybe I can get him interested enough to take a look at it.
I like the idea of pressing a button to trigger calibration. any chance you could provide the code.