BAR GRAPH READOUT VOLTMETER


Posted on Feb 6, 2014

Sections of RS339 quad comparator each drive LED to give indications of four different input voltage levels, While LED 1 is connected to ground for use as zero indicator Resistors shown are for Radio Shack 276-041 red LEDs ›change R6-R9 to 270 ohms and R1 to 470 ohms for green LEDs Pot R1 is used to calibrate voltage divider R2-R5 With R1 set all


BAR GRAPH READOUT VOLTMETER
Click here to download the full size of the above Circuit.

ow resistance, comparators turn on at intervals of 1 V or more With high resistance for R1, comparators turn on at fractional-volt intervals. F. M. Mims,  Integrated Circuit Projects, vol. 4,  Radio Shack, Fort Worth, TX, 1977, 2 nd Ed. , 76-85.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Sawtooth generator circuit
Switched-mode-motor-speed-controller
Four-Input Minimum Maximum Selector Circuit
The Design of Car Audio Power Amplifier
Driving a Bipolar Stepper Motor with Arduino and ULN2803AG
linearizing circuit for thermocouples
Stereo balance indicator
BA1451F Am Radio / Fm If Stereo System Ic
Atari Joystick USB Adaptor
Quadruple semi-continuous casting machine speed control circuit
DK-1 type control box using the AC electromagnet closing circuit



Top