I have NAV too. Some person sent me BLAST.exe!!!! AHHHHHHHHH, NAV got it. I got rid of it. The same person sent me W32sobig.exe!!!!!! What do you guys think? I...
6115
rtstofer
Sep 1, 2003 2:21 pm
You didn't say whether this is an analog joystick - in other words, at some position less than full forward does the output on the blue lead have a voltage...
6116
Rod Reidnauer
titantornado
Sep 1, 2003 2:32 pm
Ha, 30. that's nothing. I have received it a couple hundred times already. (always killed by NAV) Almost every one has come from my website e-mail...
6117
Rod Reidnauer
titantornado
Sep 1, 2003 2:47 pm
Could it be a simple as this, for a high current adjustable voltage regulator? I've added a diagram in the photos section labled "High Current Voltage...
6118
Rod Reidnauer
titantornado
Sep 1, 2003 2:56 pm
Stinkin' Yahoo cuts off the full web address, you will need to copy and paste the whole thing if you want to get to the right picture. This might work too...
6119
rtstofer
Sep 1, 2003 5:53 pm
You are setting the base voltage on the pass transistor and hoping that Vbe doesn't change with collector current. Depending on the application the resulting...
6120
aix59
Sep 1, 2003 6:38 pm
So do I....
6121
zeyad rezk
zeyad_rezk
Sep 1, 2003 10:35 pm
Thanks for ur replay , when i use op amp ,how can i connect the output wires
of the joystick ? (there are three wires ) one is common and the others for
the...
6122
rtstofer
Sep 1, 2003 11:46 pm
I don't know how to respond to this - you said that you had various voltages on the output between green and blue and green and yellow. It would seem that...
6123
manifold
manifold_1
Sep 2, 2003 5:44 am
Yes, it will sort of work. You need to move the pot to the output instead of the input to actually get any regulation. Actually, you need to use a fixed...
6124
manifold
manifold_1
Sep 2, 2003 5:49 am
At 1kHz you can just add a gain and boost stage similar to an audio power amplifier. That would be the least expensive way and it would give you the behaviour...
6125
rtstofer
Sep 2, 2003 12:01 pm
I couldn't find the app note at National Semiconductor but they have one that uses a pass transistor, regulates the output voltage and has over current...
6126
Alvin Rose
ajroseca2
Sep 2, 2003 5:51 pm
An LM358 or LM324 will output a square wave up to 54 volts peak to peak using a supply of 27 volts (3 nine volt batteries in series) Also a TS522 and a...
6127
Alvin Rose
ajroseca2
Sep 2, 2003 5:51 pm
Is there a way to make a voltage regulator into a dc supply that will start at 0 volts and go to 10 volts over a period of 30 minutes or so..I want to produce...
6128
Scott Thompson
blueelectron9
Sep 2, 2003 8:40 pm
You could use an RC circuit to produce an exponential waveform, or charge a (relatively) large capacitor with a (relatively) small constant-current source to...
6130
rtstofer
Sep 2, 2003 9:17 pm
I think you should give serious consideration to using a PIC microcontroller to set the address bits of a DAC. You can pick the resolution you need - maybe 10...
6131
zeyad rezk
zeyad_rezk
Sep 2, 2003 9:52 pm
Hi rtstofer : u can see the data sheet of this joystick in the following link : http://www.rsegypt.com/cgi-bin/bv/search/SearchDisplay...
6132
rtstofer
Sep 3, 2003 12:17 am
There are a couple of ways to look at this. If you use a 10V power supply with the black wire grounded then all voltages will be above 0 which is helpful....
6133
manifold
manifold_1
Sep 3, 2003 12:53 am
Yes. Using a PIC or other micro-controller is the only way to get repeatable performance. An RC solution will give a different ramp each time it is restarted;...
6134
manifold
manifold_1
Sep 3, 2003 12:58 am
I have not seen that app note. It must use more components to achieve current limit. It can't be done with a single regulator and single pass transistor. And...
6135
Alvin Rose
ajroseca2
Sep 3, 2003 1:18 am
Hi Guys I'm not too familiar with pic microprocessors but I have done some work with the atmega 128 line of processors for control. I thought of a simpler...
6136
Scott Thompson
blueelectron9
Sep 3, 2003 1:57 am
What exactly are the performance criteria? I thought a simple pot was being used in the first place. Even a xtal oscillator is going to have significant drift...
6137
mindover2003
Sep 3, 2003 2:24 am
Hi Friends, I have just joined to this group.I do electronic experiements during my leisure time.However, I'm not an electronic guy. I want to build a ...
6138
Dave Mucha
dave_mucha
Sep 3, 2003 3:30 am
Hi All, first post here. I have a desire to use a filter to eleminate a noisy signal for an ADC and am getting stumped on filters and gain. Is there a simple...
6139
rtstofer
Sep 3, 2003 3:58 am
It's been a couple of months since I saw the app note but I am not too certain that thermal was not included. As I recall, the 3 terminal regulator was in...
6140
Scott Thompson
blueelectron9
Sep 3, 2003 4:03 am
A decibel is 1/10 of a Bell and is a base-10 logarithmic ratio of two numbers. If you are talking about voltage, then the dB gain is 20*log(Vout/Vin) and if...
6141
Vincent Geesing
vinnie230979
Sep 3, 2003 7:24 am
If i'm not mistaken, dB gain, or -dB gain is a sort of amplification of the signal. Do you want to make a static filter, or do you want to change the filter...
6142
ravi sumith
mindover2003
Sep 3, 2003 9:19 am
Decibels provide us with a convenient means of expresing gain (amplification) and loss (attenuation) in electronic circuits. The decibel (dB) is one tenth of a...
6143
Charles Douvier
intellstat
Sep 3, 2003 2:05 pm
An oscope with an LED display would be worthless. I am guessing you mean LCD display? It would probably be easier and cheaper to make a computer interfaced...
6144
Henning Wright
mfem.geo
Sep 3, 2003 3:14 pm
... Hello, A long time ago Popular Electronics (IIRC) published plans for an LED oscope. Havent got the mag anymore but the thing used a bargraphdriver...
