A guide to building a tepaphone. This is the science of psionics, frequency use, etc.
It is about the brain :-P I have not yet read it...
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It is about the brain :-P I have not yet read it...
Some people write a resume as if the purpose of the document was to land a job. As a result they end up with a really long and boring piece that makes them look like desperate job hunters. The objective of your resume is to land an interview, and the
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It is about the brain :-P I have not yet read it...Description complète
It is about the brain :-P I have not yet read it...
It is about the brain :-P I have not yet read it...
http://keshefoundation.org Updated 10-31-15 v2. FREE energy has finally been released to the world and you can now power your own household with Mr. Keshe's Magrav power plasma unit. …Descripción completa
Helpful ways to help the body’s natural immune system do a superb job of helping fight disease-causing germs. However, as good as the system is, it can fail at times, allowing germs to invade and cause illness.
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PIC and USB - French version/Version française - Forum: Microcontrollers and usb
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· Linux on Fujitsu stylistic 1200 · How-to build a webserver for 30Euros with ENC28J60
· A little autonomous robot · A new autonomous robot project (V2) · How-to build a usb device a with 18F4550 or 18F2550
USB and PIC tutorial - Part 1 - How to build a USB device with a PIC 18F4550 or 18F2550 - Part 2 - Application: How to build a USB thermometer
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Part 1: How to build a USB device with a PIC 18F4550 or 18F2550
Electronicfr en francais
· Fabriquer un serveur web avec un circuit
Overview
ENC28J60
· Un petit robot autonome picbasic 3B · Un nouveau robot autonome à PIC
PIC 18F4550 and 18F2550 are powerful microcontrollers including a full-speed USB V2.0 compliant interface. With these MCU it's very easy for the hobbyist to design USB devices with very few components.
· Construire un périphérique USB avec un PIC 18F4550 ou 18F2550
In this page, I will describe how to use the CDC firmware from Microchip. It permits to emulate a serial port with a PC running Windows or Linux. It's also very easy to build HID devices.
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The 18F4550 experimentation board Here is a picture of the experimentation board:
(You can click on the picture to get an high resolution picture) This device is compatible with the microchip USB bootloader Please note C5 is 470nF (the datasheet recommend 220nF but more is better) and should be low ESR (for example a multi-layer ceramic). Don't forget the 100nF decoupling caps. Here is a possible implementation
You can download MCHPFSUSB_Setup on the Microchip website. It's a windows .exe :(. The firmware we will use is written in C (for the C18 Microchip compiler). This code is (royaltyes) free, but it's not a free software, so it's not possible to redistribute modified source code In this archive, you will find:
q q q
q q
The USB bootloader and its source code in C18 A windows utility for the bootloader The CDC firmware source code (serial emulation) in C18. It can be used with the USB bootloader without modification Another firmware for the HID device A windows driver for CDC (under linux CDC-ACM is natively supported)
Some tips for your prototypes: Source code is in the fw/cdc/MCHPUSB.mcw directory You should comment the following lines in usbcfg.h for a self powered usb device:
Next part -> Application: How to build a USB thermometer
PIC and USB - French version/Version française - Forum: Microcontrollers and usb
Electronicfr in english
· Linux on Fujitsu stylistic 1200
USB and PIC tutorial
· How-to build a webserver for 30Euros with ENC28J60
· A little autonomous robot · A new autonomous robot project (V2)
- Part 1 - How to build a USB device with a PIC 18F4550 or 18F2550 - Part 2 - Application: How to build a USB thermometer
Part 2: How to build a USB thermometer with PIC 18F4550 or 18F2550
· How-to build an usb device with 18F4550 or 18F2550
. New: Discussion forum
Electronicfr en francais
Sensor and schematic We will add a temperature sensor to the circuit described in the first part of this tutorial. You can use the very usual LM35 circuit (Datasheet), or many others circuits like MCP9701, TC1047...
· Fabriquer un serveur web avec un circuit The following schematic show how to plug the sensor on our USB experimentation board:
ENC28J60
· Un petit robot autonome picbasic 3B · Un nouveau robot autonome à PIC · Construire un périphérique USB avec un PIC 18F4550 ou 18F2550
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The firmware We will add some code for analog to digital convertion and temperature calculation in the file user.x
//Lets add includes for ADC and strings manipulations #include #include #include //[...] // We will write output data in this string char input_buffer[64]; // [...] void Exercise_Example(void) { int temp; // [...] else if(start_up_state == 3) { if(mUSBUSARTIsTxTrfReady()) { //A0 set in input TRISAbits.TRISA0 = 1; memset(output_buffer, '\0', 64); output_buffer[(6*5)] = '\r'; output_buffer[(6*5)+1] = '\n'; OpenADC(ADC_FOSC_8 & ADC_RIGHT_JUST & ADC_0_TAD, ADC_CH0 & ADC_INT_OFF & ADC_VREFPLUS_VDD & ADC_VREFMINUS_VSS, 0b1011); SetChanADC(ADC_CH0); Delay10TCYx( 50 ); ConvertADC(); // Start conversion while( BusyADC() ); // Wait for ADC conversion temp = ReadADC(); // Read result and put in temp CloseADC(); // Disable A/D converter
The value in Celsius degree will be sent threw the USB bus when the button on RB4 will be pressed. Under windows, you can use the hyperterminal utility (19200bd with a 20MHz cristal) to see the value. Under linux you can use cat /dev/ ttyACM0 .
How to use a 18F2550
You can use the source code for 4550 w ith very few modifications. Just select the appropriate device in the MPLAB configure menu. Change the linker script, and set the configuration bits (like in this picture). Remove any references to port D in io_cfg.h. Here is a picture of a small prototype using PIC 18F2550:
Some links about USB Making sense of the USB standard (Beyond logic) Understanding USB (usbdeveloper) USB 2.0 Specifications(usb.org)
Getting help Ask your question to the ele ctronicfr community http://www.electronicfr.com/forum/phpBB2/viewforum.php?f=1.
Disclaimer ANY CONTENT ON THIS WEBSITE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
Next Soon, you will find a schematic for a USB to serial (RS232) converter.