Recent content by Rainier9

I need to print the int i right next to the main, but I need to do it while I am in the if portion of the following code: int i = 7; int main() { int i = 5; cout << ::i; if(1) { int i =9; cout << ::i<<endl; } return 0; } Right now it prints 7. I need it to print 5...

It's because is required for a class. Otherwise I'd just use an Arduino. Thanks for answering though! More opinions are welcome as well.

Hi everyone, I was wondering if any of the students or engineers here have ever worked with the 8088 microprocessor? If so, how difficult (in terms of Assembly code) would be to implement a Graphic Liquid Crystal Display (GLCD) and a RF-ID reader? I have more concern in the glcd than the rf-id...

What you need to study is another branch of engineering: Industrial Design. It's perfect for your description, and yes companies like Nike would hire you for designing a shoe. Industrial designers have to worry about aesthetics, cheap manufacturing, environment and overall a way to incorporate...

The frequency depends on the Transmitters+Receivers. There are a few available: 433MHz, 315MHZ, and a few more...

I was thinking of buying a RF kit with a Transmitter and a Receiver, and do the signal encoding and decoding with the IC pairs HT12D and HT12E. Links for images showing the transmitter and receiver are shown below, also a ciruit schematic...

Thanks xD It's a Volume Unit meter. It displays the intensity of the sound.

Hi everyone, haven't been posting here for a while now...And as always, I come with a doubt xD I want to activate a simple circuit (one that swtiches a transistor ON and OFF) via RF (any other wireless communication method is very well welcomed, except optical of course). The thing is, I...

Thanks for everyone's help. We finished the project in early may of the year, I thought some of you may want to see the end results, so here's a quick video! The VU meters are the lights at the sides and the top. The other lights are activated by movement.

Thanks a lot for your help. I decided using a dual supply, since I was getting some undesirable voltage at the output, it worked wonderfully with the dual supply, thanks again!

Oh, but the voltage levels of the inputs is not going to be an issue for the LM3916, as I am pre-amplifying each signal before summing. I'll give it a try both ways.

Is the opamp of that circuit supposed to sum LOW IN and HIGH IN? I only got one more question, what's the reason you think, I need the Precision rectifier? Take in consideration that I am now using dual supplies. I tested with a single supply and even though it worked, it had noise and I wasnt...

I was going to use it as a bargraph display for some 110volts lights, hence the optoisolator. Why would it lit from the centre if its supposed to measuer the Power delivered by the output of the summing amplifier? If there isn't a signal to sum, wouldn't all the leds be 'off'? What I am trying...

Thanks a lot for everything you've done. I really appreciate it, now I am going to simulate it and work my ways around the circuit. Note that I won't be using it to actually 'listen' to the output, but to use it as the Signal Input for a LM3916 that then will drive some Opto-isolators. Any...

Thank you for your fast reply. If it isn't too much, can you then explain me how would I sum the signals with the single supply? A 2 channel schamtic is all I need, sorry to bother, and again thanks.