Frequency of 100mHz

Simple frequency meter with TFT display on Attiny, measurement range from 0 to 100mHz.
It works from the CR1220 type battery, there is a switch to the 1 to 10 divider with a maximum amplitude of 50V.
There are distributed components that can be purchased in any radio mag. Example SS for the packaging ~110 UAH (for the purchase of the packaging at a retail price).