Search found 326 matches

by Sambuchi
Fri Oct 09, 2009 8:59 am
Forum: Computer Programming
Topic: How to program a PLD from ATMEL
Replies: 2
Views: 1404

Re: How to program a PLD from ATMEL

ok, I found what I needed.
by Sambuchi
Fri Oct 09, 2009 5:50 am
Forum: Computer Programming
Topic: How to program a PLD from ATMEL
Replies: 2
Views: 1404

How to program a PLD from ATMEL

I am looking at this device.

ATF22V10C

I was wondering how to program it. I cant find any hardware tools explaining how to do this.

Tony
by Sambuchi
Fri Oct 09, 2009 4:02 am
Forum: General Discussion
Topic: Pulse Generation
Replies: 7
Views: 844

Pulse Generation

Hello all. I have a question for the experts here.

I need a circuit that can generate a 5V 50ns pulse every 90us

Whats the best way to do this?

Thanks in advance!

Tony
by Sambuchi
Tue Jul 21, 2009 7:23 am
Forum: General Discussion
Topic: Amp Circuit Explanation
Replies: 6
Views: 794

Re: Amp Circuit Explanation

I forgot to thank everyone for their input!

Thank you very much! I now have a better understanding what is happening here.

My input conditions are:
The pulse width is 50ns and periodic 90 ms.
The min signal pwr that needs to be detected is 560nA

Again your input is greatly appreciated.

Tony
by Sambuchi
Thu Jul 16, 2009 11:51 am
Forum: General Discussion
Topic: Amp Circuit Explanation
Replies: 6
Views: 794

Re: Amp Circuit Explanation

This 3 stage amp has a 1000 x amplification to a IR signal coming in. I'm guessing that the first stage is filter out high frequencies and at the end of each stage has a comparator. That is the best I can think of. I need something that can do this. Hopefully with today IC's this circuit can be simp...
by Sambuchi
Wed Jul 15, 2009 5:18 am
Forum: General Discussion
Topic: Amp Circuit Explanation
Replies: 6
Views: 794

Amp Circuit Explanation

Hello all, I have a circuit that I found on the net and was hoping to get some feedback on it. It is an amplification circuit that can be turned on/off. DET_CH0 is the signal input with 50 impedance. PWR_CH0 turns power on off to the circuit and DET_PULSE_CH0 is the out. Looking at the circuit you c...
by Sambuchi
Tue Jun 30, 2009 9:11 am
Forum: General Discussion
Topic: Coax Cable/Connector Signal Loss
Replies: 6
Views: 1041

Re: Coax Cable/Connector Signal Loss

Thank you Robert for putting my mind at ease. Yes the signal will be digital The total length of the cable wont be longer than 40 feet. I think with what you said I should be ok. I am designing the board that the cables connect to and I included 50 termination and matching. I want to thank you again...
by Sambuchi
Mon Jun 29, 2009 10:17 am
Forum: General Discussion
Topic: Coax Cable/Connector Signal Loss
Replies: 6
Views: 1041

Re: Coax Cable/Connector Signal Loss

What frequency? Very low and low power. ~ 200kH What style connector? I would be using some standard SMA stuff. How long is the cabling? I don't know! I cant make it long if I loose too much of the signal. But if properly installed with proper tools can be much less. I will be getting the proper too...
by Sambuchi
Mon Jun 29, 2009 6:28 am
Forum: General Discussion
Topic: Coax Cable/Connector Signal Loss
Replies: 6
Views: 1041

Coax Cable/Connector Signal Loss

Hello all, I would like to calculate the signal loss in a coax cable and connector. I don't have a particular connector in mind. I was hoping to find an online calculator that would allow me to plug in some numbers to see what the loss would be if I were to use a certain length RG178 cable with some...
by Sambuchi
Thu May 21, 2009 4:20 am
Forum: General Discussion
Topic: Build Piezo Motors on PCB
Replies: 2
Views: 508

Build Piezo Motors on PCB

I thought this was neat.
Turn your PCB into a motor!

http://www.pcbmotor.com/default.aspx?CMSID=125

Seeing that spinning coffee cup tells me its about that time! :D
by Sambuchi
Mon May 11, 2009 9:18 am
Forum: General Discussion
Topic: 28V BATTERY TO 5V / 3.3V
Replies: 11
Views: 1362

Re: 28V BATTERY TO 5V / 3.3V

I have processors on a data bus operating at high speeds. Noise could greatly effect my design.

I was reading this and that is what got me on this subject.
http://www.robustdc.com/library/an005.pdf

Now i'm reading up on Galvanic isolation. Wow... Getting little overwhelmed. :D
by Sambuchi
Mon May 11, 2009 6:55 am
Forum: General Discussion
Topic: 28V BATTERY TO 5V / 3.3V
Replies: 11
Views: 1362

Re: 28V BATTERY TO 5V / 3.3V

I'm worried about the current surge from the device and the return current messing up my GND.

In these cases I thought there was ways to protect your circuit.
by Sambuchi
Mon May 11, 2009 5:23 am
Forum: General Discussion
Topic: 28V BATTERY TO 5V / 3.3V
Replies: 11
Views: 1362

Re: 28V BATTERY TO 5V / 3.3V

Ok, I have a twist to put on this. I have a device that I need to hook up to my embedded design. It will need the 28V input from the battery to run and will need to interface to my micro. The 28V device can draw 1 amp 28W. I am worried now when I activate the 28V device on and off, the current will ...
by Sambuchi
Mon Apr 27, 2009 5:17 am
Forum: General Discussion
Topic: 28V BATTERY TO 5V / 3.3V
Replies: 11
Views: 1362

28V BATTERY TO 5V / 3.3V

Hello everyone. I've been asked to make a widget for one of my buddies. The widget has to go on a vehicle that runs on 28V battery. I need 5V and 3.3V to run what I want to use... micro/GPS/radio. I dont see this design drawing more than 2 Watts. My next step now is to go to Linear's website to play...
by Sambuchi
Tue Apr 21, 2009 9:19 am
Forum: General Discussion
Topic: RabbitCore Modules
Replies: 0
Views: 693

RabbitCore Modules

Hello all. I just wanted to share some information to you... For the past year I have been doing Ethernet based systems for my company. The processor that we use is a Rabbit they can be found here... http://www.rabbit.com/ Bang for buck you cant find something better for an Ethernet based system. Th...