What can you do with the $50 in present days? Well, some of you might want to feast yourself with some fast foods; Or, you might want to buy a new clothe etc. What is your reaction, if you are being told that you can have a 40MHz frequency counter for under $50?
Yep, this is not a joke, where with less than $50, you can have an 8 digit LCD display, 10Hz resolution, a six channel digital voltmeter, and the optional offsets (The offsets are being used as a receiver or transceiver) and much more!
By the way, you must always remembered that the main function of AVR frequency counter is to use for measuring the frequency in a set period of time or the number of oscillation/pulses per second in a repetitive electronic signal. Therefore, you have to make sure that the LCD display need to be the standard industry 16×2 dot matrix module for the clearer display.
Another advantage of using this AVR frequency counter is it requires low current single supply operation, where it can be operated with a small battery. Hence, you can bring it to anywhere you want!