License

Public Domain

Tags
Recommend Projects

SineWaveMod tidied up

2 years ago 335
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
  • Comments

Description

Schematic and PCB layout tidied up to look more professional.

Open in Editor to see the changes.

Redrawn the schematic to make it more readable and to clarify signal and power flow and decoupling cap placements.

Added netnames.

Note that the 2 pin output connector now has the unused pin grounded. Previously, this pin was floating.

It is a bad idea to have a single wire connecting the output to some other point especially as the output resistance is 10k. Such a a single wire wire connection forms a loop with the ground connection via the input and/or 12V supply connections. This loop acts as an inductor and allows noise to be injected into the signal being fed to the Arduino input. This in turn may cause measurement errors due to pulse miscounting.

Redesigned PCB layout to use thicker traces and to place decoupling caps and comparator feedback resistors closer to where they need to be and to make signal and power currents flow logically through the PCB. This also simplifies tracking and maximises effectiveness of copper areas.

Note that all tracking is now on the bottom layer except ground which is a single, continuous copper area on the top layer.

Check out the Schematic and PCB Design managers (Design button in the left hand panel)

Note: no DRC errors in the PCB.

PCB corners rounded.

Because we can.

And it costs no more.

:)

Open the PCB up and play with it to see how the copper areas work and to see how net names help readability and checking using the Design Managers.

Documents

RPM_Signal_Module_v2.0b

RPM_Signal_Module_v2.0b

BOM

ID Name Designator Footprint Quantity
1 10KΩ RIN,R4,R5 AXIAL-0.4 3
2 10Ω R2 AXIAL-0.4 1
3 LM7805CT VR_5V TO-220(TO-220-3) 1
4 WJ301V-5.00-2P SINE_IN,SIG_OUT,12V_SUP WJ301V-5.00-2P 3
5 100nF C1 RAD-0.2 1
6 10uF C2 RAD-0.2 1
7 1N4730A D2,D1 DO-41 2
8 47KΩ R1,R3 AXIAL-0.4 2
9 LM311P U1 DIP8 1

Attachments

None
Success
The owner does not allow comments in this project now

Comments (0)

goToTop
你现在访问的是EasyEDA海外版,使用建立访问速度更快的国内版 https://lceda.cn(需要重新注册)
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https://lceda.cn/editor 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.