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DISPLAY_BOARD_FOR_RADAR_GUN

2016-12-12 13:10  
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DISPLAY_BOARD_FOR_RADAR_GUN
This circuit takes signal (doppler) from a radar,un, amplifies and limits it, and feeds the frequency into a counter (U4) and display circuit (DISP1, DISP2,U5,U6). Counter calibration is set by clock circuit U2B. Calibration is obtained via R21 and R22. R21 can be changed if kilometers/hour readout is desired.