Figure 1 shows the electrical circuit of the frequency divider. The input circuit contains a frequency multiplier made on two elements of the U1 CD4070 XOR chip. The doubled frequency signal enters ...

Posted in Arduino Hacks, Tool Hacks Tagged arduino nano, diy oscilloscope, dso, frequency counter, signal generator ...

Figure 2 shows the detailed design of the frequency counter. Comparing this schematic to the previous GPSDO schematic, you can see the changes. Along with the removal of the VCXO circuitry, you will ...

If you have an old “Racal-Dana 199x” frequency counter or similar 10 MHz internally referenced gear with a poor tolerance “standard quartz crystal oscillator” or bit better “temperature ...