ولت متر دیجیتال بدون میکرو - نسخه قابل چاپ +- Parsi Coders (http://parsicoders.com) +-- انجمن: Electronics and Robotics (http://parsicoders.com/forumdisplay.php?fid=149) +--- انجمن: Electronics (http://parsicoders.com/forumdisplay.php?fid=150) +--- موضوع: ولت متر دیجیتال بدون میکرو (/showthread.php?tid=3655)

ولت متر دیجیتال بدون میکرو - a.mehran - 09-06-2014 This is an easy to build, but nevertheless very accurate and useful digital voltmeter. It has been designed as a panel meter and can be used in DC power supplies or anywhere else it is necessary to have an accurate indication of the voltage present. The circuit employs the ADC (Analogue to Digital Converter) I.C. CL7107 made by INTERSIL. This IC incorporates in a 40 pin case all the circuitry necessary to convert an analogue signal to digital and can drive a series of four seven segment LED displays directly. The circuits built into the IC are an analogue to digital converter, a comparator, a clock, a decoder and a seven segment LED display driver. The circuit as it is described here can display any DC voltage in the range of 0-1999 Volts. PCB dimensions: 77,6mm x 44,18mm or scale it at 35% انواع مقاومت برای انواع ولتاژ 0 - 2 V ............ R3 = 0 ohm 1% 0 - 20 V ........... R3 = 1.2 Kohm 1% 0 - 200 V .......... R3 = 12 Kohm 1% 0 - 2000 V ......... R3 = 120 Kohm 1% ---------------------------------------- R1 = 180k P1 = 20k trimmer multi turn R2 = 22k U1 = ICL 7107 R3 = 12k LD1,2,3,4 = MAN 6960 common anode led displays R4 = 1M   R5 = 470k   R6 = 560 Ohm       C1 = 100pF   C2, C6, C7 = 100nF   C3 = 47nF   C4 = 10nF   C5 = 220nF مدار تغذیه