Search found 21 matches

by Leo Hathaway
Sun Jan 13, 2019 7:53 pm
Forum: General Discussion
Topic: Something Wrong with Coupling Capacitor
Replies: 7
Views: 313

Re: Something Wrong with Coupling Capacitor

I think whether this can be regarded as the equivalent series of stopping DC capacitor, so the capacity decreases, the low frequency impedance increases, and the bass becomes worse. If the combination of the front and back stages is not constant, any straight phase can be removed; the combination of...
by Leo Hathaway
Thu Jan 10, 2019 6:37 pm
Forum: General Discussion
Topic: Something Wrong with Coupling Capacitor
Replies: 7
Views: 313

Re: Something Wrong with Coupling Capacitor

Thank you all you advice at first. I guess, this can be regarded as the equivalent series of stopping DC capacitor, so the capacity decreases, the low frequency impedance increases, and the bass becomes worse. If the combination of the front and back stages is not constant, any straight phase can be...
by Leo Hathaway
Thu Jan 10, 2019 12:12 am
Forum: General Discussion
Topic: Something Wrong with Coupling Capacitor
Replies: 7
Views: 313

Something Wrong with Coupling Capacitor

I bought a 5532 front tuning board, with two coupling capacitors on the output side of the tuner, another two resistors at the input end without coupling capacitors, and two coupling capacitors at the input end of the post-stage power amplifier. In this way, there are four coupling capacitors betwee...
by Leo Hathaway
Thu Dec 20, 2018 7:49 pm
Forum: General Discussion
Topic: Resistor Color Codes
Replies: 9
Views: 381

Re: Resistor Color Codes

Thank you all guys. I look for the solution just for learning, I know the resistor color codes is less popular now :|
by Leo Hathaway
Thu Dec 20, 2018 1:51 am
Forum: General Discussion
Topic: Resistor Color Codes
Replies: 9
Views: 381

Resistor Color Codes

For the resistor color codes, it is necessary to understand the corresponding relationship between the colors and the Arabic number. So I find some material to learn it, the color in different positions has different digital meanings, that is, the colors representing different values( learning from ...
by Leo Hathaway
Wed Dec 05, 2018 12:47 am
Forum: General Discussion
Topic: Looking for a Specific IC Embedded Systems
Replies: 1
Views: 189

Looking for a Specific IC Embedded Systems

I want to make a hand held device of very small dimensions, which incorporates 4 leds and a motor. I used an 8051(https://www.kynix.com/Parts/2627837/8051%20CONTROL%20BOARD.html) to control these leds and motor and code accordingly, but as size is a constraint I can’t afford to make use of it. The I...
by Leo Hathaway
Wed Dec 05, 2018 12:43 am
Forum: General Discussion
Topic: Some questions met when designing PCBs
Replies: 2
Views: 229

Re: Some questions met when designing PCBs

Thank you for your advice, it helps me a lot. :cool:
by Leo Hathaway
Wed Nov 28, 2018 1:55 am
Forum: General Discussion
Topic: Some questions met when designing PCBs
Replies: 2
Views: 229

Some questions met when designing PCBs

I've designed a kind of PCB now, but never put much thought into good practices. They were small boards and most of the emphasis was put into just making sure everything connected that needed to be connected. I want to get more serious into making well designed boards currently. I've designed and re...
by Leo Hathaway
Mon Nov 19, 2018 5:44 pm
Forum: General Discussion
Topic: How to select the Gate Drive Resistor
Replies: 4
Views: 222

Re: How to select the Gate Drive Resistor

My major is electronic engineering, is there any problem?
by Leo Hathaway
Thu Nov 15, 2018 10:25 pm
Forum: General Discussion
Topic: How to select the Gate Drive Resistor
Replies: 4
Views: 222

How to select the Gate Drive Resistor

I am currently doing my graduate paper design about the drive resistor of MOSFET, be specifically, about the gate drive resistor, and I'm trying to figure out how to use the parts which are available from the Internet. Fortunately, I find a article about the calculation, there have formulas and calc...
by Leo Hathaway
Thu Nov 08, 2018 5:57 pm
Forum: General Discussion
Topic: How select the Commonly Used Electronic Components
Replies: 5
Views: 352

Re: How select the Commonly Used Electronic Components

Thanks a lot for all you guys suggestions, I will continue to look for the better way to improve my ability at this field.

Sincerely,
Leo
by Leo Hathaway
Wed Nov 07, 2018 1:05 am
Forum: General Discussion
Topic: How select the Commonly Used Electronic Components
Replies: 5
Views: 352

How select the Commonly Used Electronic Components

Daily contact with electronic components is a common practice for engineers, but for beginners, even if they have information about the type of components they need, it is a headache when they browse the merchants to buy them. The datasheet is the same, and there are some additional reference values...
by Leo Hathaway
Tue Nov 06, 2018 11:57 pm
Forum: General Discussion
Topic: Amplifier LM358—classical circuits
Replies: 5
Views: 460

Re: Amplifier LM358—classical circuits

Thanks a lot for your kindness, I have found the materials and asked some professional people to get to know them clearly.

Cheers,
by Leo Hathaway
Fri Oct 26, 2018 12:47 am
Forum: General Discussion
Topic: 1,000 LED Sequencer
Replies: 45
Views: 6470

Re: 1,000 LED Sequencer

Hi, A better knowledge of the features of the LED and circuit, which can lead to efficiency improvement and powerful design tools. It is found a detailed way to describe something of the LED. This is very valuable information for the design process https://www.kynix.com/Blog/397.html If you know mor...
by Leo Hathaway
Fri Oct 26, 2018 12:27 am
Forum: General Discussion
Topic: Need help with a circuit again
Replies: 29
Views: 1139

Re: Need help with a circuit again

I think you must know the component very well and then you may have a test to check it.

So the basic knowledge of your components in circuit you must know, here is the part https://www.kynix.com/Blog/316.html, also you must keep your circuit is correct first.

cheers.