1Hz Timebase For Readout And Counter Applications


Posted on May 6, 2012

This counter makes direct readout of frequency-generating equipment very easy when a 1-H


1Hz Timebase For Readout And Counter Applications
Click here to download the full size of the above Circuit.

z time-base is added to latch, reset, and the count signal is conditioned. This design has the flexibility to select either polarity. By differentiating, inverting, and ORing the clock pulses in XOR gate U2A, a stream of 1-Hz, positive, 200-/as pulses is generated. For latching, the 1-Hz stream is again differentiated in U2B, input 1 to supply a 50-/as pulse. Though U2B"s output goes from high to low, it can be reversed, by making input 2 low. Because the reset pulse must occur after the latch signal, the 1-Hz stream from U2A is delayed 100 at U2C input 1. The output-pulse polarity is determined by making U2C"s input 2 either high or low.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Hi-Fi Headphone Amplifier
Car battery condition checker
Full-wave scr control
Laser Head (A2074) Manual
Contactless air range finding method on the basis of P89LPC932
output relay delay audio amplifier
anti theft security for car audios
PCM2706 USB DAC with I2S
Oscilloscope
Dimming circuit using capacitance
LC189 making decorative lanterns with fans
For differential drive circuit diagram of a voltage output DAC AD5620
Precision Analog VU-meter Circuit



Top