The Multi function frequency meter is an instrument that can measurement many things in a single display with
LED 7 segment 8 digit. The controls measures sector as well as the display is used a single master IC. Is A good IC of Intersil Corporation.
The Multi function frequency meter is an instrument that can measurement many things in a single display with LED 7 segment 8 digit. The controls measures sector as well as the display is used a single master IC. Is A good IC of Intersil Corporation.
Start from the oscillator circuit which has Which has external devices works together the base time circuit inside the IC-3X1 working together with C1, C12, R11 are the oscillator
circuit. By determine frequency of use at X1 is 10 MHz has C12 to adjust the frequency. This frequency value of 10 MHz May switch to 1 MHz by changing X1 is 1 MHz. By modify the CTRL circuit at pin 1 that use R 10K connected series with diode 1N4148 to pin K2 of display section.
Circuit Multi Function Frequency
The main input that use to measuring the frequency at an input A, but an input B is used compared with the measurement input A only. The selector switch (SW8) is used to select the measurement function. The switch-SW7 is used to select a range.