Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Hi,
This is my some years old project I finally posted:
Instructions and design files on Instructables
Design files at the bottom of the page. Click on vote for the PCB contest, if you like the design :)
I'm accepting any ideas for better USB to I2S chip (I would prefer not to use full...
Are you going to draw any current from the circuit? If you are a voltage division is not a good idea. But if you use it as a reference you could just use resistors to divide the 300 Vac into 5 Vac in the first place. But this is only if you don't draw much current from it.
1. It might burn the LEDs (200 mA). Use a 10k resistor instead of 1k and it will work (20 mA). The resistor need to withstand 200 Watts though :)
2. Your circuit will flicker slightly (even if it's said that human eye only detects 20 Hz flicker with 50% duty cycle). With a rectifier bridge and...
You can have multiple devices in one network, and control each individually by choosing the right IP. And using a microcontroller you can control pretty much anything you want to.
You might want to use Arduino with an Ethernet shield to try this out, it's cheap and easy, as there's a ton of...
I think choosing the best microcontroller for the project in also about what you want to learn. If you want to learn about microcontrollers, you should probably use something else than arduino. But if you don't know much about electronics, and just want to build a working device, I think arduino...
Measure from both ends of R2 and D1 and the Q2 collector. You should have 9 V, ~1.6 V, ~1.6 V, 0V and 0V. This won't be the case though, because you've connected something wrong.
I recommend you trying out Arduino. That is an easy start to microcontrollers. You will figure the thing out just by reading their online resources. https://www.arduino.cc/ It's a microcontroller platform that is very capable and easy to use. After that you can move to something more...
If you have a DC signal (signal is always higher than ground, no minus voltage), this will do:
https://upload.wikimedia.org/wikipedia/commons/3/3b/RC_Divider.svg
You'll have to remember that you shouldn't put too much load on this circuit though. Or if you do, you need to buffer it with an op...
I prefer using PICs own HW USB-port. It can be configured to be seen as a COM port on PC. It can also be used to power up the system and it's a common connector. At least PIC18F-series had this option, I bet they haven't removed it in PIC32. This way you don't even need external components...
They're both normal capacitors. They just call it a coupling capacitor when you want to connect two points with a capacitor. Normally that is in circuits where you only want to couple AC voltage, but not the DC part. So you couple them by AC and decouple DC. For example in audio amplifiers you...
You should also consider using some current limiting. Without knowing anything about you circuit, you could consider adding a series PTC thermistor for current limiting. The thermistor has a very low initial resistance, but when current increases, the thermistor heats up, building up more...
Hi,
If the resistor is the first thing to fail, I would guess it leaves an open. But that's just a guess. If you want it to leave an open, you should buy a special type of resistor, that is promised to leave an open in case of burn. Capacitors are also sold in the same manner.
Edit:
Here's an...
Hi,
That sounds like a big inductor. Generally they are named much like resistors. 103 would be 10 uH * 10^3 = 10 mH. The inductors in the picture would be 22 uH (22 uH * 10^0) and 47 uH (47 uH * 10^0). You probably get the idea?
Re: 2N2222A Transistor Types
If there's a difference in performance, it must read on the datasheet. There should be some extra letters after "2N2222A". Otherwise they won't differ. Metal packaging could offer better heat sinking properties, but not necessarily. Please post the exact product...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
