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.
You are not mistaking... I am old enough at this point to have enough experience to know how these things work. So here is my problem; I get approached 3 or 4 times a week by recruiters from large companies. All of them start with the same "We noticed your experience and so on..." at some point...
I used to work for a large tech company in a Physical Design group. In reality the group did only layout work using propriety tools developed internally (I even contributed to their development at some point). We never ran synthesis, STA was done using external tools that were wrapped in the...
I have finished a schematic and would like to "reset" the annotation (part designators) from left to right so they will make more sense. I go to Tools --> Annotate but I can't click it since it is in gray. Any idea why is that?
I have created a schematic symbol for an IC, power pins are hidden and marked as zero length. How can I connect these to specific power net in my design? I have several power nets and none are called VCC or GND.
As far as I know this should be possible to do (for the entire design) from edit...
Everything does seem OK now, the logic analyzer is unhappy about one of the transfers but I can confirm the ADC which is getting the data works as should. Do you happen to know which document has all this info that might help me avoid these problems in the future? I have the peripheral guide and...
CS seems OK other than that weird behavior at the beginning. I'm pulling the pin high in code, after that it will go low and than it will toggle high-low again before sending data. I am also not sure why the clock is not returning high after the the 3rd byte was sent.
Here is how the functions are being called in main:
MAX5216Init(&hspi3);
MAX5216Write(&hspi3,32000);
I have changed the settings to push/pull & no pull-up.
Here is what I see now:
Here is my code:
void MAX5216Init(SPI_HandleTypeDef *hspi)
{
MAX5216_CS_HIGH; // De-select MAX5216
MAX5216_CLR_HIGH; // Normal operation
uint8_t aTxBuffer[]={0x80,0,0}; // Temp buffer for command
MAX5216_CS_LOW;
HAL_SPI_Transmit(hspi,(uint8_t*)aTxBuffer,3,1000)...
I've setup SPI3, together with the rest of the project, in CubeMX. The CS is controlled by software so before starting a transfer I pull the pin low using a command from the GPIO library, after that a number of bytes are clocked out using a function from the SPI library and finally CS is pulled...
OK, I see...
The idea of the project is to record an audio signal onto a disc media, just like you said. The thing works OK with high voltage (50 - 100V) but I would like to lower that voltage, between 50 - 75%. The direction I was looking at is a current source which is modulated by the...
What type of copy machines you refer to? As far as I know they had some special coating on the drum which caused a charge to build up when the surface was lit or something along that lines.
I also think the high voltage needed is because of the lack of current driving capability of my circuit...
I want to be able to record a signal on a plate that is made up of a metal disc coated with an isolated oxide. The metal is grounded. A transistor with high voltage and current delivery capability is connected to a brush with discharges a small charge on the disc while it is moving. Another...
Here is the schematic, the graph that Multisim outputs and the setup I use for the analysis, which is the default but with a shorter time period. You can see that I alter the switch using a PWL voltage source. The program does show the voltage falling across the cap as soon as the switch closes...
I'm given this circuit:
The switch is open for a long time (so steady state is reached). at t=0 the switch closes and at t=1 usec the switch opens up again.
So here are the highlight in my analysis and where simulation using Multisim disagrees with me.
Before t=0, the voltage across the cap...
I'm starting a curve tracer design and the 1st fundemental circuit I need to test is a bi-polar current source I can control digitally as the project is micro-controller based. After looking at all kind of different solutions I've found the good old Howland current pump in an application sheet...
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.
