You need to use EasyEDA editor to create some projects before publishing
Cant get an oscillation in my circuit
433 5
jokou 9 months ago
I'm a beginner in electronics and im trying to recreate this simple circuit i saw in a video ([https://youtu.be/QBatvo8bCa4?si=CuoNs3b35IVsrZIT](https://youtu.be/QBatvo8bCa4?si=CuoNs3b35IVsrZIT)) but i cant get an oscillation. Can you help me?![Στιγμιότυπο οθόνης 2023-08-27 011732.png](//image.easyeda.com/pullimage/DX6ugnhDHnRnQWJe44BBrkcG79ObA4PL910Y7DIn.png) Here's what i came up with ![image.png](//image.easyeda.com/pullimage/wFppKrwItefu3YQ2KdSFfxNnPESPPXfpq8IPnelw.png) ![image.png](//image.easyeda.com/pullimage/8Ny9zoVKsB2ofOBnsuO4xW0niL6EsPUji87h8l5t.png)
Comments
andyfierman 9 months ago
The power supply to SCHMITTINVEE is reversed. Look at the +/- polarity labels on the inverter and on the power supply, V1, pins. Before attempting simulation in EasyEDA, you must also read the Simulation Tutorial (3), in (2) in: [https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a](https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a) In particular you will find the section (9) on **Initial conditions and starting up circuits** helpful. BTW, before you correct your mistake, you look at the current drawn through V1, that will show you a huge current. That huge current should tell you that there is something wrong with your circuit.  In a real circuit, that huge current would burn out the device, giving a visual and olfactory indication that something is wrong. :)
Reply
andyfierman 9 months ago
Although it is usually less important in a simulation (because power supplies are often assumed to be ideal), you might like to read about the importance of power supply decoupling: [https://easyeda.com/forum/topic/UPDATED-Power-supply-decoupling-and-why-it-matters-30a39d0a77f34d5d8dc77e37c035b3d3](https://easyeda.com/forum/topic/UPDATED-Power-supply-decoupling-and-why-it-matters-30a39d0a77f34d5d8dc77e37c035b3d3)
Reply
jokou 9 months ago
Using your recommendations and with the help of the document you provided i came up with a circuit but when i start the simulation i get a gateway timeout error. I think its the pulse times that dont let me run the simulation but i cant get it right. ![image.png](//image.easyeda.com/pullimage/0OrTu80FEKTlISWdHqKxp3Q92mIRf2MNhPo15Gq8.png)
Reply
jokou 9 months ago
No matter i found the problem it was the capacitance value. Thanks for your help and the documents you provided helped me a lot to understand things i could never think of.
Reply
andyfierman 9 months ago
For info: The circuit you have made is an unusual configuration. Normally R1 is placed in parallel with D1. Also, you can change the duty cycle by adding a resistor, R2, in series with D1. In that case, R1 is connected across the series pair of D1 and R2. You can make the rise and fall times completely independent by adding a second diode, D2 in series with R1. D2 has to be connected in the opposite direction to D1. :)
Reply
Login or Register to add a comment
goToTop
你现在访问的是EasyEDA海外版,建议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 -mockplus- -mockplus- -mockplus- -mockplus- -mockplus- -mockplus- -mockplus- -mockplus-@1x -mockplus-

Cookie Notice

Our website uses essential cookies to help us ensure that it is working as expected, and uses optional analytics cookies to offer you a better browsing experience. To find out more, read our Cookie Notice