Frequency meter and event counter module:

LCD panel meters, temperature or event counter modules are readily available in many electronics retail shops at reasonable prices. But try to find a practical, efficient, and value for-money frequency meter module and you will be disappointed. In that case, this article will, no doubt, be welcome. It describes a module based on a RISC (Reduced Instruction Set Computer) microcontroller, which guarantees accurate measurements over a wide frequency range for a reasonable outlay.