Plus it will match the dual battery voltmeter I installed last year. Personally I don't like analog gauges and I can put a digital one together for less than 15 bucks in parts, actually less because I have most of it on hand already. If someone has already done this I don't want to waste time 'reinventing the wheel'. to match the input on a microprocessor IC that will count the frequency and convert it to drive four 7 segment LED display's. Basically I need to convert that pulse down to 5 V. had considerable needle bounce, and lacked a precise zeroing capability. 7 volt drop across the diode can help too.īTW I'm just poking around the net trying to find any info on digital tachs. The printed circuit board, batteries, and a battery charger are housed in the. That's why they spec a 1 amp diode which is going to be a rectifier diode rather than using a high speed switching diode (Like used in a envelope detector circuit) like a 1N918 or 1N4148Īlso most of the frequency to voltage IC's in these tachs have to have a voltage level on the input that's 1.5V or more lower than the supply voltage so the. What they are doing here is using inherently slow switching speed of a rectifier type diode to smooth out the pulses.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |