Frequency Generator circuit

  
This is a useful instrument for works hops. The standard of the produced frequencies is 10 to 1. The basic frequency is produced by a crystal with high accuracy. The circuit is consisted by the oscillator, around the crystal and the frequency divider, which divides to 10. The produced pulses are quadrangular.
Frequency Generator circuit - schematic

R1= 1 Mohms C1-2= 27pF ceramic Q1=1 MHZ Crystal R2-8= 100 ohms C3= 100nF 100V MKT D1= RED LED R9= 33K ohms IC1= 4584 TR1= BC337 R10= 1.5Kohms IC2-7= 4017