You need to use EasyEDA editor to create some projects before publishing
bc547 equivalent
1370 11
djlace 4 years ago
What transistor would one recommend out of the jlcpcb SMT library that would be a basic equivalent to the bc547. All it's doing is controlling the brightness of an led, I'm not sure which one to pick out of what is available.
Comments
andyfierman 4 years ago
Your circuit is private so only you can see it. Please read: [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) To properly select an equivalent you need to show us your application or at least describe the max collector voltage and current and a circuit showing how you are driving the base of the BC547. The JLCPCB parts list: [https://jlcpcb.com/parts/componentSearch?secondSortUuid=65bdd51e95f94772bab043e587d091aa&name=Transistors%20(NPN/PNP)&firstSortUuid=6cb8980d2f8d498ba2169b6aedbeaafc](https://jlcpcb.com/parts/componentSearch?secondSortUuid=65bdd51e95f94772bab043e587d091aa&name=Transistors%20%28NPN%2FPNP%29&firstSortUuid=6cb8980d2f8d498ba2169b6aedbeaafc) is not helpful because it is just a list of part numbers with minimal device spec info and no way to sort by parameters. Starting with a datasheet for BC547: [https://www.onsemi.com/pub/Collateral/BC550-D.pdf](https://www.onsemi.com/pub/Collateral/BC550-D.pdf) The MMBT3904 is not an equivalent but it might be suitable: [https://www.onsemi.com/pub/Collateral/MMBT3904LT1-D.PDF](https://www.onsemi.com/pub/Collateral/MMBT3904LT1-D.PDF) You will have to do some simulation work or old fashioned maths to check it's suitability in your application.
Reply
andyfierman 4 years ago
This might make finding a part from JLCPCB a tiny bit faster but not much... [https://jlcpcb.com/componentSearch/uploadComponentInfo](https://jlcpcb.com/componentSearch/uploadComponentInfo)
Reply
djlace 4 years ago
totally sorry dude. my bad. here is the schematic. It's just 12v driving a bicolor with a couple bc547 transistors and a pot to fade between them. [https://easyeda.com/djlace/bc547](https://easyeda.com/djlace/bc547)
Reply
andyfierman 4 years ago
Try searching the JLCPCB online list for: NPN 100mA 45V or NPN 100mA 50V and see: [https://easyeda.com/forum/topic/Please-make-JLCPCB-components-catalogue-sortable-and-searchable-like-LCSC-parts-lists-b8edafd3f2c34167aecf192710ff1a5a](https://easyeda.com/forum/topic/Please-make-JLCPCB-components-catalogue-sortable-and-searchable-like-LCSC-parts-lists-b8edafd3f2c34167aecf192710ff1a5a) :)
Reply
djlace 4 years ago
Found one ! the bc847. You da man! thanks!
Reply
andyfierman 4 years ago
@djlace, Sorry, I'm being dim. BC847 is an SMD equivalent to the BC547.
Reply
djlace 4 years ago
All good! I barely know what I'm doing! Lol, all feedback is appreciated! thanks for taking the time to help me! :D
Reply
andyfierman 4 years ago
I haven't tried but I think you may have a problem when you do Convert to PCB... because the User Contributed PCB Footprint assigned to the Schematic Symbol you have used for the pot both net names assigned to the pins. If you chek the connectivity using the Design Manager you may see errors flagged up. If you need help just keep the project public and post back. :)
Reply
andyfierman 4 years ago
Sorry, meant to add: (2.3) 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) will give more of an insight to that.
Reply
JLCPCBsupport 4 years ago
@andyfierman  Well done !!
Reply
andyfierman 4 years ago
@djlace, @JLCPCBsupport, Thanks!
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