Q&A Forum
Hello, i have a old eddy current brake for testing my 50cc Race bike. It is really a old one but the break works. I like to renew the break now with some electronics. I am not sure about the needed loadcell because you use the american weigth system. We use Kilogramms here . On my scale i have mostly 15 to 18 Kilogramm. What loadcell must i select? The loadcell works with compression/push or tensile loading/pull ? Sorry for my bad english. Greatings from germany.
Daemo
Hi,
No problem to us an old brake, many brakes are several decades old and still work well!
You should be good with a 50lbs load cell. Does your setup already have a load cell? If so, you can most likely use it with YourDyno. Otherwise, order with a new 50lbs load cell.
YourDyno supports both metric and imperial units, so no problem to see all in Newton meters and kilograms, it is just an option in the software.
Cheers,
Jostein
Hello Mr. Jostein, is there an option to pick up the rpm directly from the engine? Like an Ignition stroboscope ?
Regards
Daemo
Hi,
The new kits support an optional second RPM input. It uses a 0-5V signal. To use an inductive rpm sensor, you need a converter to 0V-5V signal. The electronics for this is really simple, but it is not built into YourDyno.
Let me know if you find a system on the market that delivers a 0-5V signal, it can be useful for many.
Cheers,
Jostein
Hi,
The new kits support an optional second RPM input. It uses a 0-5V signal. To use an inductive rpm sensor, you need a converter to 0V-5V signal. The electronics for this is really simple, but it is not built into YourDyno.
Let me know if you find a system on the market that delivers a 0-5V signal, it can be useful for many.
Cheers,
Jostein
If I took the coil #1 5v logic signal from the ecu that fires the ignitor transistor, would that work for the data acquisition unit? I saw another RPM input printed on the acquisition pcb. I am guessing one side is the negative to the board and the positive side is where I input the 5v signal that triggers RPM from the spark on my Coil on plug smart coil (internal firing BIP transistor coil). I am guessing I also need a pulldown resistor to keep the pin on the acquisition unit from floating and causing a false trigger.
I just don't want to damage the board so any advice on how to take the rpm directly from the engine that puts me in the right direction will be greatly appreciated.
You guys are awesome.
-Andrew
Hi,
Indeed, the RPM input just needs a square wave 0-5V signal. Make sure ground is common! The signal has a pull-up on the board, so no need for a pull-down. Red is 5V, Black is ground and Yellow (white for some) is signal on the connector.
There are 2 RPM inputs. The second input is currently used if you have two independent brakes that need to be controlled separately. I will add more software functionality later for this signal, in the case only brake is connected. It can be used for automatic gear ratio calculation or automatic slip detection. Lots of ideas for improvements!
Cheers,
Jostein