Recommend Projects


4 years ago 4567
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
  • Comments


In this project, we are going to build a Digital Voltmeter without using any microcontroller. Here we are using a very popular IC for voltage measurement namely ICL7107/CS7107. ICL7107 is a 3.5 digit analog to digital converter (ADC) which consumes very low power. The IC has internal circuit for driving four seven segment display to display the measured voltage. It also has a clock circuit and a reference voltage source.

For detailed instructions to DIY this Voltmeter circuit and PCB design, click here.





ID Value Qty. Package Components
1 ICL7107CPL1 U1 DIP40 1
2 Seven Segment Display J1J9,J1J10,J1J11,J1J8 NONE 4
3 120K R1 AXIAL-0.4 1
4 100pF C1 RAD-0.2 1 C26856
5 100nF C2,C5,C7 RAD-0.2 3 C26856
6 5k PR1 RES-ADJ_EVN6X6 1 C5018
7 22K R2 AXIAL-0.4 1
8 47K R3 AXIAL-0.4 1
9 47nF C3 RAD-0.2 1 C26856
10 220nF C4 RAD-0.2 1 C26856
11 10K R4 AXIAL-0.4 1
12 1M R5 AXIAL-0.4 1
13 Probe J1 M1X2 1
14 Probe(optional) J2 H2-5.0-10.5X8.0MM 1 320110006
15 1k R6,R7,R8,R9 AXIAL-0.3 4
16 555 Timer U2 DIL08 1
17 1N4148 D1,D2 DO-35 2
18 -L7805 U3 L7805 1
19 10uF C6,C CAP-D5.0XF2.0 2 C19576
20 1K R10 AXIAL-0.4 1
21 -LED U4 LED5 1


The owner does not allow comments in this project now

Comments (1)

martin garix (martin) Reply

Play Online mahjongg dark dimensions,it is not high concept game,you can easily to play with out any problem mahjongg dimensions dark now invite your friends and classmate to play this simple tiles based game.

如果需要转移工程请在个人中心 - 工程 - 工程高级设置 - 下载工程,下载后在 打开保存即可。
有问题联系QQ 3001956291 不再提醒
svg-battery svg-battery-wifi svg-books svg-more svg-paste svg-pencil svg-plant svg-ruler svg-share svg-user svg-logo-cn svg-double-arrow
We use cookies to offer you a better experience. Detailed information on the use of cookies on this website is provided in our Privacy Policy. By using this site, you consent to the use of our cookies.