Analog counter circuit


Posted on Oct 4, 2012

A straightforward circuit using a LM311 for the level detector and a CMOS analog gate to discharge the capacitor is shown. An important property of this type of counter is the ease with which the count can be changed; it is only necessary to change the voltage at which the comparator trips. A low cost A-D converter can also be designed using the same principle since the digital count between reset periods is directly proportional to the analog voltage used as a reference for the comparator. A considerable amount of hysteresis is used in the comparator.


Analog counter circuit
Click here to download the full size of the above Circuit.

This ensures that the capacitor is completely discharged during the reset period. In a more sophisticated circuit, a dual comparator ' 'window detector'' could be used, the lower trip point is set close to ground to ensure complete discharge. The upper trip point could then be adjusted independently to determine the pulse count.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Acceleration sensing USB interface
44 Watt Mobile Car Stereo Amplifier
OddWatt Audio 5751 SRPP / KT88 Push-Pull Monoblock Tube Amplifier Kits
ADUC832 1.3MIPS 8052 MCU + 62kB Flash + 8-Ch 12-Bit ADC + Dual 12-Bit DAC
PLL1706DBQ 3.3-V DUAL PLL MULTICLOCK GENERATOR
RF2516 VHF/UHF TRANSMITTER
Improved vacuum tube models for SPICE
Chloroplast type 1 SE
Only one-way operation of the automatic control circuit of the motor



Top