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Hi thanks for reply, yes there is a ground plane underneath the antenna trace, but the ground on either side of the trace on the top layer is just to add extra capacitance to mach the impedance to 50 ohms.(I used this calculator) If I would remove the ground under the inductor also capacitance...
The purpose of the inductor is to block the RF signal and feed the antenna line with DC current (bias tee). Maybe removing ground on the bottom side of the board would also be considered?
The current through inductor in normal conditions is 100mA max. In case of external surge voltage, the...
I have a dilemma wether I should allow the ground pour to go under inductor (see image) or not.
The inductor had a restrict area underneath it in Eagle, so currently there is no ground plane under it.
Why to allow: then the ground path for antenna microstrip would be uninterrupted
Why not to...
ok thanks. How should I trace my ground connections? Jus as short track from one connector to the other as possible with no ground plane on either side?
I have a little different problem. I just need to draw a short 50 ohm feedline (not antenna) on the PCB. It is in 150MHz range. Do I need a ground plane on the other side of the board and is the trace width important at all?
I just have an RG-58 coaxial cable that connects to the PCB board, goes...
I have a new 110 Volt Precision rework station + soldering iron 2in1 station on an auction. No rserve price.
These stations go up to 200 USD. See it quick before it ends (07 detsember)
**broken link removed**
It is a high quality station and I have used it myself for years. Iron heating...
Does anyone know why I cant change contrast on 5110 LCD?. When I send the command (0x80 to 0xff) to one of my 3310 LCD-s to change Vop, the contrast changes like it should. But I recently bought a bunch of 5110 LCD-s(which I think are refurbished cause they look used) and this command doesn't...
Hey, thanks
I copied the link again
**broken link removed**
in case if it won't work it's the AN966 pdf and asm files
---------- Post added at 14:10 ---------- Previous post was at 13:58 ----------
If I can understand right, I should be able to replace the chips any time without processor...
I just bought atmel - at25320b SPI EEPROM. Can I make it wirk with PIC16f887? Pinout is the same, page system is the same (32 Bytes per page) as Microchip 25LC320A. Is there anything else I should consider?
In Atmel's manual it is said that it is designed to work with 6805 and 68HC11 series of...
My PIC was 16f690. I have never seen shared memory mentioned in manual so I'm sure this device doesn't have that. My solution to the proböem was to create two W_TEMP registers one in bank 0 and other in bank 1 (W_TMP_B1). So If iterrupt occurs in bank 0, w goes to W_TMP if it occurs in bank1...
Ok here is typical entry and exit from Interrupt routine in 16f microcontrollers:
Entry
movwf W_TEMP ; Copy W to TEMP register
swapf STATUS,W ; Swap status to be saved into W
clrf STATUS
movwf STATUS_TEMP ; Swaps are used because they do not affect the status bits...
As it turns out I can place the strings anywhere in the code I want, on any page:-D, very nice. Now I got plenty of memory to store many screenfull of text, and it is much easyer than call instruction and then having to mess around with PCLATH register to point to the right page.
Thanks alot
yes now I see. The High address(EEADRH) is always cleared in "lee_rotulo" subroutine. Now before I load "lee_rotulo" I also read high string label
movlw high mensaje2
and place it in EEADRH, now I can read data that is located over the 256 byte limit. Next thing to do is to place all the data...
Thanks for answer.
One thing about this code I don't understand. When usually dt direcrive is used in lookup tables and the table is called with a "call" instruction, then here is just movlw "string label" instruction. How can the whole string fit into W register???? Does it? or the program...
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