12oclocker

OK, here is a pic of the first PCB, this thing is going to be TINY! About the size of 3 dimes width wise, and about a dime tall. I will post more pics of the install and the completed PCB once the connectors get here...

I've rebuilt a few engines, and done all my work on my bikes with tools I bought at Meijer, Walmart, and Harbor Freight. never had a problem with them. Stanley and GreatNeck I think is what they are, they work fine. I have some snapon tools, but I never really use them

Video of the Tachometer prototype design connected to a bike and working... this video is of the redesigned firmware for the chip. http://www.youtube.com/watch?v=vsTTdsS879M

crazy man, people are trying to kill us out there.

I wrote a new firmware version yet again, which instead of sampling how many pulses that occur over a given period of sample rate time, it actually measures the distance in microseconds between 2 pulses, doing thousands of calculations per second. this drastically increases the stability and gives dead on accuracy without ANY floating at all! It also allows the display to update Instantaneously if desired, unfortunately for me the firmware is now incredibly more complicated. which is probably why most people who design RPM meters don't do this, but it is a far superior way to do the calculations if you have a microprocessor that can handle it. I spent about 40hrs or so on this firmware version.

Very nice!

It should work on ALL bikes, I just need to test it on them to make sure, principle of operation is the same for all bikes, just a matter of hooking it up. On a side note, I think the healtech may actually have a EEPROM burn issue, healtechs continiously check and stores your max speed in eeprom, I thought about this while writing the firmware for my digital RPM meter, I thought about making it store the max RPM to eeprom, but then realized the EEPROM is only good for an average 100,000 read/write cycles, and if I load the previous stored EEPROM value to SRAM at startup, right there I reduce my product life to 100,000 power ups, then to take it a step further, If I write my max measure value to EEPROM every time I detect it occurs at a 500ms measure rate, I could actually Burn up my EEPROM after only 138 hours of operation of slowly increasing measurement values. naturally your measurements are going to jump around, and not slowly increase over such a long period, so your EEPROM reliability time would be much higher, but it still posses a "possiblity" of premature product failure after only a few years of operation in my opinion.

Updated the firmware, now it can work for 2stroke or 4stroke engines, by setting a jumper or flipping a switch, the screen now updates every 500ms, and shows the RPM reading for the last 1sec of sampled data, data is sampled every 500ms, and it uses the last 2 samples for calculations. screen scan is still 5ms. This gives a faster screen response but still maintains smoother readouts

I dont know of any bike salvage yards near where I live

haven't started on the gear indicator yet, been doing the board layout for the speedo healer and tachometer, I got the tach down to 1.4" by 1.4" by .8" height, I got the speedo healer down to 1.5" by .59" by .19" height

Yeppers!

I'll know the cost soon, I got to figure out what enclosure to buy I'll work on one that does speed pretty soon probably, I was tossing that idea around as well

for an enclosure, what do you guys like better of these 2?

thanks for the tip, I think my homemade board look pretty professinal now, after 12 years of making them I finally got it down to a science, I can even make traces as small as a human hair, lol, here's one I did back in 2006, it does not show hair traces, I dont have any pics of my hair trace design, I used that one on a midi controller back in 04 I think, I'll see if I can dig any of the boards up...

after the engine break in period you can use synthetic without molly additive. using synthetic before break in period is over can glaze your cylinder wall, and cause the piston and rings to not propery mate with the cylinder wall.

dude thanks for that tip man!!

I was thinking about doing that today..

a function generator, mine goes from 10hz to 1Mhz I think. it does square wave or sine wave generation.

that made me sick, yuck!

same way the other companies like trail tech do it, from the 12v lead before the coil which feeds the spark plug.

I make all my pcb's they actually come out looking like they came from a board house. that sounds good dustin, I'll let you know as soon as I have a few built... well many years ago I used to do this stuff as a job jesse, but then I started working in telecommunications field, and now I just do this stuff for fun.

Finally got the design done, took all weekend, and was a hundred times harder than I thought it was going to be, but was bored while waiting for my speedohealer project parts, and its been raining all weekend... The final unit will look very nice, and be very tiny on a PCB board, this picture is of my prototyping board. It uses a single ATMEL microcontroller chip which does everything! drives the display, measures the frequency coming from the coil on the bike, and does the calculations to convert to RPM and format the display data! So far its probably the most complicated microcontroller project I've done. The processor will sample the frequency coming from the bike in 1sec intervals, and while sampling, it displays the data it collected from the previous second. This unit will measure from 0 to 65500 RPM's! (shows 0.0 to 65.5 on the screen) Displaying 2500 rpm (2.5k RPM) Displaying 12,000 RPM (12.0k RPM) screen shot of the ATMEL AVR Development environment...

Yeah, I'll probably be making more speedo healers, first batch is only gonna be 4, with factory connectors for Yamaha WR250X (Found out it will fit other Yamaha Years also, pretty much whatever yamaha bikes use the same Speed Sensor Connector as the WR250X) I've already designed my TACH, its SWEET! A Single Chip Design, 1 microcontroller, measures the frequency going to your plug, does some 16bit binay math in an 8bit processor to convert to RPM's, then Displays the number on 7segment LED displays... Right now.... ...I'm trying to design if I want it to have Three 7 Segment Displays Like this.... 10.5 RPM's (x1000) ....and you would know there is to be a x1000 multiplier, Or if I should just put Five 7seg displays on there to read this.... 10500 RPM's this method seems kinda like a waste, since my binary math and frequency sample rate is always going to have the last digit read zero anyway, why bother having them? Anyone have any suggestions on how it should look? [10.5] RPM x1000 ....OR.... [10500] RPM ????

Zoltan does Wheelie Circles backwards, and does wheelies in circles, and for miles, with no front wheel. do some youtube'n

I just downloaded the new AVR studio version to start writing some asm for some microcontrollers, I'll probably be making a TACH, and gear position indicator next for the WR250X