https://cungchoinhac.com/mach-dien/mach-dien-tu/do-tu-hoa-tren-mach-esr-meter
ESR meter (95$) too expensive.
https://anatekinstruments.com/products/fully-assembled-anatek-blue-esr-meter-besr
http://www.electronicrepairguide.com/build-your-own-esr-meter.html
https://www.eevblog.com/forum/testgear/$20-esr-lcr-transistor-npn-pnp-mosfet-meter/
PNP transistor in WR 740 router
http://www.icvn.com.vn/virtuemart/search?keyword=2SB772&limitstart=0&option=com_virtuemart&view=category
http://kme.com.vn/products/b772-sot-89
http://www.icvn.com.vn/virtuemart/linh-kiện-smd-khác/transistor-mosfet-smd-30-sp/2sb772-smd.html
http://igbt.com.vn/2sb772-b772-transistor-pnp-3a-40v-sot-89.html
http://www.szct.com.cn/Cn/upload/B772.pdf
https://linhkienbandan.com/shop/transitor-b772-2sb772-pnp-40v-3a-to-126/
https://linhkiendientu104.all.biz/
http://linhkientudong.vn/plc_c226.aspx
[TODO] Move to new post WR740
https://phobosk.wordpress.com/2012/10/21/how-to-turn-your-tp-link-tl-wrt740n-router-into-a-fully-functional-one-using-openwrt/#jp-carousel-64
http://goughlui.com/2013/09/20/tp-link-tl-wr740n-cheapest-dd-wrtopenwrt-router-ever/
https://en.wikipedia.org/wiki/File:Energy_Efficiency_in_Transports.png
http://www.fsbrec.com/pdf/2SB772T.pdf
https://www.electronicsrepairmadeasy.com/2010/08/do-it-yourself-flyback-tester.html
https://www.eevblog.com/forum/beginners/(cheap)-esr-meter-for-beginner-suggestions/
http://kripton2035.free.fr/esr-repository.html
Cheap opensource LCR tester can not test ESR of capacitor in circuit ?
Đã mua 1 bản tiếng Trung ở HN bên banlinhkien. Giá rẻ 180K chắc do bản tiếng Trung.
https://91make.world.taobao.com/
Link gốc sp ở đây.
Mạch test này do 1 thanh niên người Đức viết phần mềm và làm bản đầu tiên sau đó public dạng opensource cho cộng đồng sử dụng và update.
Về code C (hoặc Assembly) mình nghĩ không dài, cái quan trọng của board này là phải hiểu nghiệp vụ các cách và mạch đo link kiện khác nhau.
Về cơ bản mạch hoạt động nhờ theo dõi điện áp thay đổi khi ta cấp các mức dòng điện khác nhau lên chân của linh kiện test. Dòng điện khác nhau này tạo nhờ 2 điện trở đi vào mỗi chân.
"...by only applying different currents by two different resistors on each pin and checking how the voltages change "
Đây là video review trên EEVBlog
Link tài liệu gốc:
https://www.mikrocontroller.net/articles/AVR_Transistortester
Mặc định trang để tiếng Đức, các bạn có thể thấy tiếng Đức hay dùng chữ 'k' thay cho 'c' như mikro, teknique, ekonomy, musik ...
Có linh tiếng Anh ở ngay đầu list chọn ngôn ngữ.
Đây là comment của tác giả trên Youtube:
I'm the creator of the original version of this tester; it uses an ATMega8 and a 2x16 character LCD as told in the video. I started this project in early 2009: After seeing a similar commercial tester (Atlas DCA 55), I thought it would be an interesting project to try building a similar device myself.
As far as I remember (it's so long ago...), my first version could only detect bipolar transistors, diodes, MOSFETs and resistors. For this reason, I called it "Transistor tester".
But the component detection - by only applying different currents by two different resistors on each pin and checking how the voltages change - worked far better than I had imagined. So I thought the project may be useful to others and decided to release it.
I released the code completely free to everyone in a German microcontroller forum: At this time I was 16, was programming C for only about 2 years, and didn't even know about open source licenses :D .
So it's completely OK for me that others make money of the project. I'm really pleased and impressed that this project got that popular and developed further by the community.
Many features shown in the video were added by the community and not by me: Inductor detection, Vloss and ESR measurement for capacitors, the battery voltage display, and several more. Since the community versions completely surpassed it, I stopped active maintenance of the original version at some point in 2012.
Just one more thing about the capacitor measurement: In the original version, it just shorts the capacitor to discharge it, then charges it via a resistor, and measures the time until a I/O pin connected to the capacitor changes from low to high. This threshold voltage isn't too accurate, therefore the capacitance reading also isn't very precise. There is no fancy measurement at 1 kHz; in 2009 I didn't know that capacitances are meant to be measured at 1kHz ;)
ESR meter (95$) too expensive.
https://anatekinstruments.com/products/fully-assembled-anatek-blue-esr-meter-besr
http://www.electronicrepairguide.com/build-your-own-esr-meter.html
https://www.eevblog.com/forum/testgear/$20-esr-lcr-transistor-npn-pnp-mosfet-meter/
PNP transistor in WR 740 router
http://www.icvn.com.vn/virtuemart/search?keyword=2SB772&limitstart=0&option=com_virtuemart&view=category
http://kme.com.vn/products/b772-sot-89
http://www.icvn.com.vn/virtuemart/linh-kiện-smd-khác/transistor-mosfet-smd-30-sp/2sb772-smd.html
http://igbt.com.vn/2sb772-b772-transistor-pnp-3a-40v-sot-89.html
http://www.szct.com.cn/Cn/upload/B772.pdf
https://linhkienbandan.com/shop/transitor-b772-2sb772-pnp-40v-3a-to-126/
https://linhkiendientu104.all.biz/
http://linhkientudong.vn/plc_c226.aspx
[TODO] Move to new post WR740
https://phobosk.wordpress.com/2012/10/21/how-to-turn-your-tp-link-tl-wrt740n-router-into-a-fully-functional-one-using-openwrt/#jp-carousel-64
http://goughlui.com/2013/09/20/tp-link-tl-wr740n-cheapest-dd-wrtopenwrt-router-ever/
https://en.wikipedia.org/wiki/File:Energy_Efficiency_in_Transports.png
http://www.fsbrec.com/pdf/2SB772T.pdf
https://www.electronicsrepairmadeasy.com/2010/08/do-it-yourself-flyback-tester.html
https://www.eevblog.com/forum/beginners/(cheap)-esr-meter-for-beginner-suggestions/
http://kripton2035.free.fr/esr-repository.html
Cheap opensource LCR tester can not test ESR of capacitor in circuit ?
Đã mua 1 bản tiếng Trung ở HN bên banlinhkien. Giá rẻ 180K chắc do bản tiếng Trung.
https://91make.world.taobao.com/
Link gốc sp ở đây.
Mạch test này do 1 thanh niên người Đức viết phần mềm và làm bản đầu tiên sau đó public dạng opensource cho cộng đồng sử dụng và update.
Về code C (hoặc Assembly) mình nghĩ không dài, cái quan trọng của board này là phải hiểu nghiệp vụ các cách và mạch đo link kiện khác nhau.
Về cơ bản mạch hoạt động nhờ theo dõi điện áp thay đổi khi ta cấp các mức dòng điện khác nhau lên chân của linh kiện test. Dòng điện khác nhau này tạo nhờ 2 điện trở đi vào mỗi chân.
"...by only applying different currents by two different resistors on each pin and checking how the voltages change "
Đây là video review trên EEVBlog
https://www.mikrocontroller.net/articles/AVR_Transistortester
Mặc định trang để tiếng Đức, các bạn có thể thấy tiếng Đức hay dùng chữ 'k' thay cho 'c' như mikro, teknique, ekonomy, musik ...
Có linh tiếng Anh ở ngay đầu list chọn ngôn ngữ.
Đây là comment của tác giả trên Youtube:
I'm the creator of the original version of this tester; it uses an ATMega8 and a 2x16 character LCD as told in the video. I started this project in early 2009: After seeing a similar commercial tester (Atlas DCA 55), I thought it would be an interesting project to try building a similar device myself.
As far as I remember (it's so long ago...), my first version could only detect bipolar transistors, diodes, MOSFETs and resistors. For this reason, I called it "Transistor tester".
But the component detection - by only applying different currents by two different resistors on each pin and checking how the voltages change - worked far better than I had imagined. So I thought the project may be useful to others and decided to release it.
I released the code completely free to everyone in a German microcontroller forum: At this time I was 16, was programming C for only about 2 years, and didn't even know about open source licenses :D .
So it's completely OK for me that others make money of the project. I'm really pleased and impressed that this project got that popular and developed further by the community.
Many features shown in the video were added by the community and not by me: Inductor detection, Vloss and ESR measurement for capacitors, the battery voltage display, and several more. Since the community versions completely surpassed it, I stopped active maintenance of the original version at some point in 2012.
Just one more thing about the capacitor measurement: In the original version, it just shorts the capacitor to discharge it, then charges it via a resistor, and measures the time until a I/O pin connected to the capacitor changes from low to high. This threshold voltage isn't too accurate, therefore the capacitance reading also isn't very precise. There is no fancy measurement at 1 kHz; in 2009 I didn't know that capacitances are meant to be measured at 1kHz ;)
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