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need to measure the Sound Pressure from 30 to 110 db and display on LCD using PIC 16F877.
on the internet i found using LM358 (pre amp + peak detector) and CA3140 (no high gain, mean preamp) for single supply and TL071 (pre amp) with LF351 (half wave rectifier) with Dual supply.
any idea how...
3v to 15v level translator
hi friends
i also need this but with 3 to 8 MHz switching speed, what to use.
op-amp, high speed transistors or what?
i want buffer output not inverting. (3.....5 TO 15) and 0 to 0.
i also used ULN but that does not work with high speed also that inverts...
virtual scope
hi friends
i want to make this project. has anyone tried this. where to find its codes.
how to start this?
or has any other option like this using PIC 16F877 and PC for a Scope.
maxim 89c430
hi friends
i have a problem in simulating 89c420 in K*eil , in that software i could not get memory map correctly, only left side geneal SFRs are showing. where r the other registers? how to get full variables data to display.
also there is a problem that @25MHz ajmp...
visual basic 9 bits serial
ok now
9600,N,8,1 works well with MCU for 0-255 but PC was not determinig the two 0s value.
hyper terminal is still showing the black rightward sign for 2 consecative zeros but VB does not show anyone therefore VB is right (null showing) but buffer count...
89c51 uart source
hi friends
i have a problem in serial communication with at89c51. i want to send 8 bits of data 0-255, i first used serial mode 1 which works well 1-255 but for zero i used mode 3 (9 bit uart) but it caused a problem.
i am using odd parity in PC. and with 8 bits, 9600 baud...
vfd graphic
hi friends
i want to interface 256x64 VFD graphic display (containing NEC ICs) with PIC/8051/AVR Controller but i dont have its pin connection and interfacing pattern. the specification of this display is
NEC ICs
D65015 x 1
D16306 x 4
D16326 x 4
BR6265 x 1
CN1 is 30 Pins Connector...
hi sherif12
i downloaded icon and got idea to save and make ico file. but i want to resize other images too. you used 321x321 and save 321-1/10 pixels.
how to resize jpg, bmp, etc .
also i want to change the color level to 2 bits or any bits color range. is it possible with thresh...
hi friends
i want to interface 64KB Parallel EEPROM (storing data not code) and 32KB Parallel RAM with 89c55 instructions MOVX. how to do it. 89c55 has 16bits address which is also equal to eeprom address where to connect RAM. or with decoder ......
what to do.
hi friend
i am new to visual basic. i want to resize or cut pictures to my own X x Y in visual basic. i.e. 800x600 to X x Y any pixel value. but how to do it.
and also can we get every pixel data of RGB in bytes of arrays like Matrices in Matlab?
if any one knows please upload code files.
hi friends
i want to save the Ram Data into pc as hex/bin file like EEPROM or EPROM files online.
i have ram rom and uprocessor in uporc. starter board and i can offline the rom, uproc. and other components except ram.
i can connect it to any eeprom/eprom programmer what will be the...
Re: MPLAB v6.3 help ?
ok massive
i got my answer.
stimulus is in debugger menu in MPLAB 6.3. there we select pin of selected MCU and then we have some options sync. and asunc. and pin action on fire low/high/toggle/pulse. nice. but it will work until the stimulus function menu is not closed.
mplab v6
hi friends
i am using mplab v6.3. i am having a difficulty in using simulation of mplab. in every software the port or pins which are defined for inputs cannot be changed during simulation. why?in mplab only.
i have written many software for taking input but when i change logic 0...
hi friend
i am studying weather monitor system containing MAX110 (12 bits A2D), MPX5100 (Pressure Sensor), AD590 (Temperature Sensor) and PIC16C64A but any one have idea or interfacing techniques/code with 8051 or PIC or with AVR then plz upload that will be very help ful for me..
i am...
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