Frequency detection using LM567

Here I am used lm567 to detect desired frequency. It supports frequency between  0.01Hz and 500KHz .
Maximum ratings
·         Supply voltage of  9V  
·         Output Current of 100 mA











Design example
Here R₁=10k, C₁=0.01uF
Then f_o=9090Hz
FREE RUNNING FREQUENCY =10.5KHz
But I got lock frequency = 11KHz

                INPUT AT  PIN 3 (BLUE)  & OUTPUT AT PIN 8 (YELLOW)

OUTPUT SIGNAL WHEN THE  FREQUENCY OF  DESIGN RANGE NOT PRESENT (PIN 8 -YELLOW)

FREE RUNNING FREQUENCY OF VCO AT PIN5

OUTPUT AT PIN 6 (CAPACITOR CHARGING AND DISCHARGING -BLUE COLOUR)

OUTPUT AT PIN  1( BLUE COLOR)

OUTPUT AT PIN  2( BLUE COLOR)

OUTPUT AT PIN 3( BLUE COLOR)
EXAMPLE  – IR TRANSMITTER(555)  AND RECEIVER (LM567 )

Applications
v  IR sensors
v  Ultra sonic sensors
v  Frequency detector