638 Threads found on edaboard.com: Convert To Negative
I need to convert a PCI layout in PDF format from positive to negative I mean background in black and traces in white or transparent keeping PDF format and dimentions.
Software Problems, Hints and Reviews :: 04.03.2006 01:22 :: fjpompeo :: Replies: 0 :: Views: 586
To build a dc-dc converter that can generate stabile negative output voltages you will have to use a transformer ..
Take a look at the attached circuit.
Although it was designed to convert +V to +V, by changing the polarity of assorted components at the secondary site you will be able to generate required negative voltage (...)
Professional Hardware and Electronics Design :: 17.03.2006 15:12 :: IanP :: Replies: 14 :: Views: 19674
I am considering to design a DC converter which can convert the positive voltage to negative voltage. Does any one have ideas about the componets, schematics of it, ...vv..
Thank in advance
There are many and many as ICL7660, MC34063, . . . . .schematics and the another informations which there is
Professional Hardware and Electronics Design :: 20.09.2006 13:00 :: KST :: Replies: 10 :: Views: 1880
I am struggling to understand why negative 8 bit convert to 16 bit ? What about positive?
What is the benefit?
data += 0xFF00; // convert to negative 16-bit
data = data;
Microcontrollers :: 29.06.2009 12:56 :: Maverickmax :: Replies: 2 :: Views: 794
What is the voltage to be converted and what current you need out of it?
Help depends on your reply.
Analog Circuit Design :: 02.09.2011 13:39 :: Raza :: Replies: 10 :: Views: 691
Do you need to convert 100V to -100V or do you want to generate as power supply capable of supplying both +100V and -100V?
ASIC Design Methodologies and Tools (Digital) :: 19.02.2013 07:36 :: nitishn5 :: Replies: 3 :: Views: 157
If your input signal is LVTTL for example:
- connected to pin A1 in Bank 1 (for example)
you have to write some HDL to route it to another bank, simple instantiation of your LVDS standard output (search in the library)
for example (X!linx)
the input to this module will be your LVTTL input and th
PLD, SPLD, GAL, CPLD, FPGA Design :: 01.10.2004 14:55 :: maestor :: Replies: 16 :: Views: 6159
Plotting polar patterns in Matlab could be proved very tricky ;)
Matlab converts negative numbers to positive/180phase... 2D polar patterns need to be carefully converted before plotting...
Moreover, 3D polar patterns are impossible with Matlab... You have to convert to XYZ data points and then plot with 'surf' or 'mesh' (...)
Electromagnetic Design and Simulation :: 18.11.2004 17:15 :: mogwai :: Replies: 7 :: Views: 4500
Any cam tool can do this.
Cam350, Camtastic, GC-CAM.....
You can also do it without CAM tool.
Most packages will allow you to have multiple PCB on the same PCB document, but of course you cannot use any rule checking features as the netlists will be corrupt.
But if you open a new PCB file, create your mechnaical details for your 'panel'
PCB Routing Schematic Layout software and Simulation :: 24.11.2004 19:19 :: Frosty :: Replies: 5 :: Views: 2065
if negative (carry set)
make complement of value
optionally display "+"
divide value by 100
if result > 0 display it
divide remainder by 10
if result >0 display it
All of this should convert to '51 asm quite straighforwardly.
Microcontrollers :: 02.09.2005 13:25 :: wek :: Replies: 4 :: Views: 733
at first for measure the current i use shunt resistive wire and when i measure voltage i see 65mVac (with voltmeter) how can i amplifier this voltage AND how can i convert to line voltage(in turkey is line voltage 220V)
DO YOU KNOW ANY CIRCUIT TO MEASURE AND convert FOR MICRO
THAK YOU EVERYBODY....
Microcontrollers :: 05.09.2005 23:09 :: dolphin :: Replies: 5 :: Views: 791
The negative format for the plane is the normal way a plane is represented in EDA software. In Protel, the planes are displayed in negative, and you edit them by placing lines and fills where you want copper removed. It is done this way in all PCB software to reduce the size of PCB and Gerber files.
There is no need to convert the (...)
PCB Routing Schematic Layout software and Simulation :: 17.05.2006 00:19 :: House_Cat :: Replies: 5 :: Views: 1717
Here is the code in assembly ( Sorry its a long one )......
; Temperature Alarm/Thermostat Celsius and Fahrenheit Display
; Use with Philips 2322-640-63103 NTC Thermistor R/r=9.0, 10K@25C
; Valid range of -50C to +125C. Basic accuracy 2% withi
Microcontrollers :: 24.08.2006 02:22 :: chevymn1964 :: Replies: 4 :: Views: 2988
haf seen tis diagram before. but dunno if this diagram works. haf u tired it before? and how to convert to sinewave?
Hobby Circuits and Small Projects Problems :: 12.01.2007 16:56 :: evelyn :: Replies: 142 :: Views: 110906
Can i do it like this way?
if(1's) // number of '1's in Data 0-7
if(Parity) Parity=Even; // Parity=0
else Parity=Odd; // Parity=1
You can't use 8051 parity bit inside C code
Please can you teach me how to write the code. Because i can match the timing accoding the attached pictures. I
Microcontrollers :: 30.01.2007 18:40 :: budhy :: Replies: 37 :: Views: 3770
How to convert antenna gain from dB to dBi (at 2.4 and 5.5GHz). I am sure its Quite simple but tricky
RF, Microwave, Antennas and Optics :: 19.09.2007 18:53 :: snkhan :: Replies: 7 :: Views: 15363
i am trying to make Microchip AN582 appnote work in PROTEUS. The code for AN582 is written for PIC16C74, but i have model in proteus only for PIC16C74B.
code compiled good in MPLAB 7.60, but when i assembled Circuit in PROTEUS. and did run that code, all pins of the PIC were in grey color! seems like no ports were set to input or output... and t
Microcontrollers :: 16.10.2007 11:00 :: BlackOps :: Replies: 1 :: Views: 859
put your red probe on the more positive side. In this case, since ground is more positive than the negative voltage supply, put your red probe on ground, and the black probe on the more negative side.
1.) So even the "continuity check" on my DVM has a "potential polarity"?
With a oscilloscope its great for signal tracing , so the signal goe
Electronic Elementary Questions :: 12.04.2008 20:03 :: walters :: Replies: 1 :: Views: 470
convert S parameter in to Z parameters.
Add XL that is inductance to Z parameters
Again convert to S parameters.
If your S11 is >1 means you have obtained negative resistance.
You find the details about the explanations in following books
You can tally this using S11 equation. (zin-zo/zin+zo)
1) Microwave transistor (...)
RF, Microwave, Antennas and Optics :: 20.08.2008 10:36 :: Abhishekabs :: Replies: 3 :: Views: 750
I am working on butterworth IIR filter & I have to implement it in ARM assembly. This filter have some fractional coefficients. Can anybody explain me how to convert this fractional coefficients in hex so that I can use it in assembly without changing the response of filter?
Digital Signal Processing :: 10.02.2009 11:43 :: smartshashi :: Replies: 3 :: Views: 2480
I want to make a negative voltage to control the zoom & focuse of my security camera and control the negative voltage with MCU. I want one component that converts the positive to negative voltage with any need of other components. any one know that what component I must use ?????????
I used from MAX232's VS+ (...)
Analog Circuit Design :: 11.04.2009 15:18 :: rezaf :: Replies: 3 :: Views: 542
The normal regulator only converts the positive voltage and their substrate is ground.
Now I want to design a regulator, whose negative input voltage may exceed its negative substrate voltage.
For example, its input voltage is from -10V to +10V, I would like to convert it to constant voltage -5V to +5V. But (...)
Analog IC Design and Layout :: 08.06.2009 19:09 :: katrin :: Replies: 4 :: Views: 1326
I have mentioned already what "large signal" means. I repeat: It does NOT depend on any output level, but instead on the input stage condition. The first stage must go for a short time into saturation - until the feedback works and brings it back to the linear region. This effect determines the slew rate.
Most opamp datashe
Analog Circuit Design :: 06.07.2009 23:05 :: Audioguru :: Replies: 31 :: Views: 1752
i dont think for any direct method . first you can convert it to pdf and change to negative mode with some editing software.
PCB Routing Schematic Layout software and Simulation :: 15.08.2009 20:01 :: rajudp :: Replies: 3 :: Views: 5539
To connect the PC to PIC we use the max232 to convert RS232 signal to TTL.
MAX485,however, makes TTL-level signals RS-485 compatible. So, logicaly, to connect a PIC to a 485 Network we use the MAX 485 and then the Max232 as interface (see figure).
I saw in internet some guys connecting PIC directly to the Max485 without us
Microcontrollers :: 03.09.2009 11:50 :: mouzid :: Replies: 1 :: Views: 2006
Hmmm, hi... Im reading the post and Im wondering why to repeat the whole block of code in the conversion of the readed data to ASCII... It would be more efficient and faster to write the common conversion one time and the negative/positive reading in the if then else structure...
PD: Its just a point of view, but perhaps Im wrong... Im a newbie
Microcontrollers :: 25.03.2010 22:16 :: albejanon :: Replies: 11 :: Views: 1719
convert it to a character string with sprintf(), this will put the ascii value of each digit into an array. You can refer to the individual digits using the array index (myArray, myArray...). If you need to convert to real decimal digits, just subtract 0x30 or logic AND (&) with 0x0F to make the conversion.
Microcontrollers :: 21.06.2010 09:49 :: betwixt :: Replies: 22 :: Views: 862
thx... .. whats a rectifier?
A rectifier is a component that converts the alternating current (AC) out of the transformer to direct current (DC).
The amplifier needs DC voltages to work.
oh and how do i tell positive and negative?.. its labelled ac1 and ac2.
Normally you use a multime
Hobby Circuits and Small Projects Problems :: 04.12.2010 21:39 :: presch :: Replies: 4 :: Views: 1228
i think that is a half-bridge converter circuit
Power Electronics :: 16.01.2011 22:40 :: qayyoum :: Replies: 133 :: Views: 7733
V = 120sin(120nt)
to convert to cosine, V = 120cos(120nt - 90°), this is correct conversion from sine to cosine right?
n = pi or 3.1416
The value of the time to reach 96V for the first time using the sine function is equal to 0.00246 seconds, using the sine function. however when using the cosine function to calculate for the time, the calc
Electronic Elementary Questions :: 19.01.2011 03:27 :: bigjoe :: Replies: 19 :: Views: 4986
I am trying to create a portable EL-wire driver that can handle a wide range of wire lengths, up to 100 feet if possible. EL-wire takes roughly 50mW per foot to glow brightly. I've been designing buck converters successfully for about 2 years now, so I thought this would be easy. But....
I am having a problem boosting 7.4 volts to the needed
Power Electronics :: 27.01.2011 00:43 :: AleXYZ :: Replies: 23 :: Views: 1956
Lets say we have a flop whose setup time is 10ns. How to convert this flop to the setup time of -10ns.
ASIC Design Methodologies and Tools (Digital) :: 28.06.2011 10:43 :: kirangu :: Replies: 4 :: Views: 705
hello sir, i want to make a circuit that measure negative voltage of battery.i am using pic adc to measure this voltage, but does not read negative voltage. so i have convert this negative to positive voltage.
1. i don't have negative voltage on the system,to convert this (...)
Hobby Circuits and Small Projects Problems :: 16.09.2011 10:50 :: zeroskj1988 :: Replies: 5 :: Views: 1081
Yes you did, but I dont understand the point of what you're doing. why bother using -0.129? you're just converting it to 0.129, so all results will be A(i) * 0.129.
why not just use ufixed all the time and use 0.129?
---------- Post added at 10:32 ---------- Previous post was at 10:31 ----------
this code i
PLD, SPLD, GAL, CPLD, FPGA Design :: 17.10.2011 11:32 :: TrickyDicky :: Replies: 13 :: Views: 275
the float data type is a 32bit value, if you convert it to a variable that uses only one byte like an unsigned char then you will loose all the decimals and you can only represent integers from 0 to 255 (0b00000000 to 0b11111111).
Assuming that the value can fit in 8bits and you don't mind truncating the decimals you can use (unsigned char)my_fl
Software Problems, Hints and Reviews :: 19.01.2012 09:42 :: alexan_e :: Replies: 2 :: Views: 310
need help in converting 12volt 2.3ah acid battery to 5volt. I have already try to lookup some information in internet and make some test. it manage to get 5volt using lm7805 ic and some capacitors but when connect to MCU it drop to 2volt reading,... need some help get the actuall capacitor and resistor for dc to dc converter
Analog Circuit Design :: 05.02.2012 06:38 :: shamito88 :: Replies: 15 :: Views: 836
I need to convert signed/unsigned decimals to their equivalent signed binary values in Matlab.I had used 2 functions but they work for positive integers only i.e de2bi() and there any function that help me or I had to write my own routine for conversion.
PLD, SPLD, GAL, CPLD, FPGA Design :: 11.02.2012 12:50 :: vickyuet :: Replies: 1 :: Views: 944
As mentioned, we need to know your current requirements on the negative 12V. However...
Switched capacitor convertors are nice and easy:
The ICL7660S converts a +1.5 to +12V into an equal magnitude negative output. It only needs two capacitors for a basic circuit - no inductors.
The LT1054 is simila
Analog Circuit Design :: 14.02.2012 01:23 :: FoxyRick :: Replies: 10 :: Views: 2218
It is simple , but it depends on the current that you need .
If your current is low , you can use a simple multiplier with capacitor and diode and some resistors .
But if you need higher currents , you can use boost converters .
So , tell me what do you need accurately , that i help you .
Power Electronics :: 29.02.2012 23:57 :: goldsmith :: Replies: 14 :: Views: 463
i need to convert a positive dc(+15v) to negative dc (-15v) at least at 2amps..
is it possible with any simple circuit or any ICs.
please suggest me.....
Professional Hardware and Electronics Design :: 10.03.2012 19:25 :: muttraj.k :: Replies: 2 :: Views: 696
I have a -15V 0 +15 supplies and i want to convert it to -5v 0 +5
please can u help
Electronic Elementary Questions :: 11.12.2012 21:21 :: mhmd.sh89 :: Replies: 6 :: Views: 199
Can't help much with the code for your pic.
However in case it must not be exposed to negative volt levels...
you will need to convert the negative pulses to a positive polarity.
A simple circuit below can deliver a positive pulse at the end of the negative
Microcontrollers :: 18.12.2012 06:37 :: BradtheRad :: Replies: 4 :: Views: 247
How should I measure this negative voltage?
You can convert that negative voltage into the positive voltage easily via an inverting amplifier with gain of -1 so you can easily measure it !
Microcontrollers :: 13.04.2013 02:35 :: goldsmith :: Replies: 15 :: Views: 309
What's the difference between using the circuit shown above and a high precision resistors to convert current to voltage ?
Although I know the above circuit is much better, but I do not know why ?
Mind share with me ?
Professional Hardware and Electronics Design :: 02.05.2002 02:59 :: ayeong :: Replies: 19 :: Views: 24011
In most cases it is not recomended to connect an unbalanced test equipment to a balanced output.
There are three possibilities:
1) Connect a load resistor from each output to ground, and connect the analyzer on one of the load resistors with a high impedance probe.
2) Connect the unbalanced analyzer to the balanced output with a BALUN (BALa
Professional Hardware and Electronics Design :: 22.07.2002 13:35 :: strabush :: Replies: 9 :: Views: 1737
I am working on serial to parallel converter for RECS-80 protocol.
Bit order in received signal is LSB--> MSB and I want to convert it to
So how can I do this in minimum :?: ? (Because my micro is 1k Flash) please give best a solution.
11000101 ---> 10100011
PC Programming and Interfacing :: 27.09.2002 15:46 :: woody28 :: Replies: 9 :: Views: 6006
Check LM2786 at National Semiconductors. It's wery good switch down converter with minimal number of external components.
Hobby Circuits and Small Projects Problems :: 03.02.2003 23:02 :: tjalps :: Replies: 21 :: Views: 17131
i have find a tool Gerbtool v12 that make this convertion but not with the demo version !!!
PCB Routing Schematic Layout software and Simulation :: 03.04.2003 12:21 :: totue :: Replies: 6 :: Views: 2329
negative setup times are achieved by pulse triggered latches. the latch design will in way that when internal clock is fed to it, it will convert it an pulse clock, by means of a circuitary. Draw a pulse clock and you will come to know.
PLD, SPLD, GAL, CPLD, FPGA Design :: 28.04.2009 05:35 :: ved9876 :: Replies: 18 :: Views: 17703
Anyone saw in web a c-program for converting 24-bit BIN to BCD format?
Microcontrollers :: 08.10.2003 10:19 :: Alexander Prad :: Replies: 7 :: Views: 8697