Stamp reccomendation for knotmeter
jimg1
Posts: 2
I built a knotmeter twenty years ago usinig an 8748, but it's long lost, and I no longer have access to the tools, the programmer, etc.
The original program worked fine and was just under 256 bytes of assembler using eight ram locations. It used three inputs (data, calibration, average) and used 22 outputs for a 3 digit seven segment LCD.
In a nut shell, I need a Basic Stamp that will do the following:
1) Interface with a 2 1/2 digit LCD
The original incarnation drove a raw seven segment display using I/O ports, but I assume there are
cheap encoded LCDs out there now. The displays on the Parallax site are either too small or too spendy.
2) Count the zero crossings of an analog input (frequency up to 100 cps)
The speed sensor actually produces a .5volt sine wave, although I can add some external processing.
3) Optionally time average the value over 10 seconds.
4) Have a calibration function.
The 8748 incarnation used a 555 oscillator to provide an adjustable reference.
An analog input from a potentiometer would work.
4) 12VDC power available
Now that I'm older and dumber, I'd prefer something easier to program and that doesn't require a huge investment in stuff.
The original program worked fine and was just under 256 bytes of assembler using eight ram locations. It used three inputs (data, calibration, average) and used 22 outputs for a 3 digit seven segment LCD.
In a nut shell, I need a Basic Stamp that will do the following:
1) Interface with a 2 1/2 digit LCD
The original incarnation drove a raw seven segment display using I/O ports, but I assume there are
cheap encoded LCDs out there now. The displays on the Parallax site are either too small or too spendy.
2) Count the zero crossings of an analog input (frequency up to 100 cps)
The speed sensor actually produces a .5volt sine wave, although I can add some external processing.
3) Optionally time average the value over 10 seconds.
4) Have a calibration function.
The 8748 incarnation used a 555 oscillator to provide an adjustable reference.
An analog input from a potentiometer would work.
4) 12VDC power available
Now that I'm older and dumber, I'd prefer something easier to program and that doesn't require a huge investment in stuff.