Cheap, very low hz frequency counters?

[ExpAnonColin]

Just so I don't have to do the math so much... are they worth it, and does anyone know where I could get a 0hz-1mhz one, as opposed to 10hz-500mhz?

-Colin

[R.G.]

There is a DIY project I've seen using one PIC and some seven segment displays to do a low frequency counter. I think the code is downloadable. Parts cost should be under $30

[ExpAnonColin]

There is a DIY project I've seen using one PIC and some seven segment displays to do a low frequency counter. I think the code is downloadable. Parts cost should be under $30

Any clues to where itis?

-Colin

[Paul Perry (Frostwave)]

The key to a low frequency counter, is to use the signal you are examining, to turn on & off a counter that is counting a high freq oscillator.
Then you do some maths
That is why you don't see many very low freq counters (look for 'period' in the description if you wnat to find one)
Another bloody job for a PIC!