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6³q½s¸Ñ½X¹q¸ô¹Ï Decoder OP-Amp "a" amplifies the incoming pulses from the receiver. This stage is self biassed and may be connected directly to the output of a ZN414Z, ZN416E or any other output with between 0 to +6vDC standing potential. If the output of the receiver is capacitively coupled, has a standing negative DC potential or is DC grounded then couple the signal in via a 10nF capacitor and connect a high value resistor (470K - 2M2) between the two points marked with an "X". The output of this stage should be a near perfect square-wave. This square-wave is used to clock the channel counter and "top-up" the charge of a capacitor. OP-Amp "b" compares the charge on the "top-up" capacitor. During the 4mS silent period this capacitor will discharge causing OP-Amp "b" to reset the counter. Note that the 4017 output 0 is a reset output and the channel outputs are 1 to 6 (up to 9). The output signal from each channel terminal is a single pulse which varies from 600uS to 1600uS depending upon the setting of the encoder channel potentiometer. A normal servo has three wires; Black, Red and White. Black is negative, Red is +6vDC and the white is the pulse input from the receiver. Servo's normally draw 300mA to 500mA which may disturb the recever. If this is the case then feed the +DC supply to the servo via a 10 ohm resistor and feed the receiver +DC supply via a diode and connect a 470uF accross the receiver supply. Encoder This is just a simple multivibrator with one timing resistor selected by a CMOS Johnson counter. In this way the start of each pulse is determined by a different potentiometer. Each potentiometer should vary from 0 to 100K. Note that normal joysticks used for computers may be fitted with a linear 100K pot but provide only 60 degrees of the total 300 degrees of movement. This means that you should either fit a 500K pot or change the timing capacitors (10n) in the encoder circuit. The ON pulse from the multivibrator should be about 300nS to 400nS in length and the OFF pulse should vary from 200nS to 1200nS. With this timing you should be able to drive almost any of the cheaper servo's (eg. Futaba, Horizon etc). The servo should give you a 180 degree movement for the full movement of the encoder pot. The 10K resistor in the encoder circuit prevents a zero-ohm pot stuffing the full supply voltage on the base of the transistor. The 300K resistor determines the length of the silence between each channel pulse-train. This period of silence should be about 4mS or more. The 4017 outputs 0 - 8 can be used to give you 9 independant proportional channels but the tenth is used to provide the silence between each channel pulse-train. I have only shown six channels in the drawings so output 7 must be used to reset the counter back to 0 again. ¡@
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¡@ I believe that the "JDM Programmer" is cheap and very useful PIC Programmer. However, since "JDM Programmer" cannot control VDD, the algorithm "VPP before VDD" is inapplicable. Programming to the latest device from this reason may go wrong when using CONFIG settings as "Internal oscillator" "MCLR OFF". These devices are given power from the "JDM programmer",and execute program code. An error may come out by verification, or it may become impossible erasure and become impossible re-programming . In order to solve this problem, I designed a programmer based on the "JDM programmer." Since this programmer was made of resistors, capacitors, and diodes, I named this the "RCD Programmer." "Hardware settings" of IC-Prog are the same as the "JDM programmer."
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¡@ C1 is a charge pump capacitor*. This works voltage doubler. When TxD is negative voltage, C1 is charged through D7 from GND. If TxD carries out turn-on, since it will become positive voltage, the voltage charged in C1 is raised. The created high voltage is regulated by D7 to about 13V. If TxD carries out turn-on, both supply voltage will be created. CTS and RTS also join creation of supply voltage. This VDD is delayed and is applied by C2 and R4. D1-D5 are clump diodes. Since voltage drop is within the limits which can be disregarded, general purpose small rectifier is sufficient as the diode to be used. e.g. 1N4148,1S1588(Toshiba),1S2076A(Renesas or Hitachi),1S133(ROHM) . When not succeeding by the device which needs programming current like 16F84(A), the value of R3 is made small. Probably, it will be good using a trimmer resistor as R3. After I published the RCD Programmer on my Web site, it has passed in one year. I obtained various questions about the RCD Programmer from many people. And Microchip newly developed Low-Pincount PICs which built in the memory exceeding 1k words. I recommend change capacity of C1 to 470uF now for stable programming. *About general description of charge pump, please refer to . A important point is not a charge pump but controll of VDD in the RCD Programmer circuit. If this point is excluded, the JDM Programmer is far more excellent than the RCD Programmer. Because the RCD Programmer works by the pulse only once, the capacitor power cannot be continued for a long time. Consideration for the computers which have poor surge protection (added: 2005-02-06 JST) When you insert a RCD Programmer into the COM port of your computer during operation("Hot Plug-in" or "Hot Socketing"), inrush current is generated. It seems that it is weak to an overcurrent and a short circuit although "EIA/TIA -562" is power saving and compatible with "EIA/TIA-232-E." So, I added 200-ohm current limitation resistor. This resistor limits peak current and help computers which have poor surge protection circuit inside. However, the RCD programmer will not work well as for such a computer because the voltage of the COM port might be very low.
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/* AVR oscilloscope with 128x64 graphic LCD. Created by Serasidis Vassilis and finished at 03.Aug.2007 Home: http://www.serasidis.gr e-mail: info@serasidis.gr and avrsite@yahoo.gr This code is ditributed under GPL licence. */ #include <avr/io.h> // include I/O definitions (port names, pin names, etc) #include <avr/interrupt.h> #include "glcd.c" void USART_Init(unsigned int baudrate); void timePause(unsigned long count); void ADC_init (void); void initTimer (void); /* define CPU frequency in Mhz here if not defined in Makefile */ #ifndef F_CPU #define F_CPU 16000000UL #endif #define msUp 1 #define msDwn 4 #define YposUp 0 #define YposDwn 3 #define freeze 2 #define AC 0 #define DC 1 #define SQUARE 2 #define TRUE 0 #define FALSE 1 unsigned int counter = 0; unsigned int dataCounter = 0; unsigned int timeDiv = 52; unsigned int analogInput = 0; unsigned char trigger = 2; unsigned char cnt = 0; unsigned char empty = 0; unsigned int out = 0; unsigned char findZero = 0; unsigned char pressedButton = 0; unsigned char upLimit = 0; unsigned char dnLimit = 255; unsigned char limitBkup = 0; unsigned char voltageType = AC; unsigned char complete = TRUE; signed char Ypos = 0; signed char Ypos2 = 0; signed char position = 0; int main (void) { DDRC = 0b00000000; PORTC = 0b11111111; DDRA = 0b00000000; unsigned char temp1; unsigned int temp2; unsigned char i; glcdInit(); ADC_init(); createWelcomeScreen(); showTheWave(); timePause(10000000); for(;;) { //--------- if (pressedButton == 0) { if (~PINC & (1<<msUp) && (timeDiv <= 1000)) { if(timeDiv == 0) timeDiv = 52; else timeDiv += 145; pressedButton = 1; } if (~PINC & (1<<msDwn) && (timeDiv >= 52)) { if(timeDiv <= 145) timeDiv = 0; else timeDiv -= 145; pressedButton = 1; } if (~PINC & (1<<YposUp) && (Ypos2 <= 60)) Ypos2++; if (~PINC & (1<<YposDwn) && (Ypos2 >= -60)) Ypos2--;
if (~PINC & (1<<freeze)) while (~PINC & (1<<freeze)); // It freezes the display to watch the wave. } else { temp1 = PINC; if (temp1 == 255) pressedButton = 0; } //--------v // This routine makes the trigger. dataCounter = 0; findZero = 0; upLimit = 0; dnLimit = 255; for (i=99; i>0; i--) { ADCSRA |= (1 << ADSC); // Enable ADC loop_until_bit_is_set(ADCSRA, ADIF); // wait until conversion complete. temp1 = ADCL; temp2 = ADCH; timePause(timeDiv); //(7); if (upLimit < temp2) // find the higher voltage level of the input waveform. upLimit = temp2; if (dnLimit > temp2) // find the lower voltage level of the input waveform. dnLimit = temp2; if (temp2 > 0) { temp2 += 5; temp2 /= 5; temp2 += 2; }else temp2 = 2; position = temp2 + Ypos2 +5; if (position <= 63 && position >= 0) // Adjust Up-Down the wave. fillDataLcdBuffer(i,position); else fillDataLcdBuffer(i,0); } if(upLimit != dnLimit) trigger = (((upLimit - dnLimit)/2)+ dnLimit); // find the middle of the wave, to be used it as a trigger. //--------^ createRaster(); createWave(); showTheWave(); dataCounter = 0; do { limitBkup = temp2; ADCSRA |= (1 << ADSC); // Enable ADC loop_until_bit_is_set(ADCSRA, ADIF); temp1 = ADCL; temp2 = ADCH; //timerPause(timeDiv); if(limitBkup == temp2) { dataCounter++; if(dataCounter >= 500) voltageType = DC; else voltageType = AC; } if((voltageType == AC) && ((temp2 == trigger) && (limitBkup < temp2))) complete = TRUE; else if((voltageType == DC) && (limitBkup == temp2) && (upLimit != dnLimit)) { dataCounter = 0; do { ADCSRA |= (1 << ADSC); // Enable ADC loop_until_bit_is_set(ADCSRA, ADIF); temp1 = ADCL; temp2 = ADCH; complete = TRUE; dataCounter++; }while ((temp2 > trigger) && (dataCounter <1000)); dataCounter = 0; do { ADCSRA |= (1 << ADSC); // Enable ADC loop_until_bit_is_set(ADCSRA, ADIF); temp1 = ADCL; temp2 = ADCH; complete = TRUE; dataCounter++; }while ((temp2 < trigger) && (dataCounter <1000)); } else if((voltageType == DC) && (limitBkup == temp2)) complete = TRUE; else complete = FALSE; } while(complete == FALSE);
} }
//=============================================================================== // //=============================================================================== void ADC_init (void) { ADMUX = 0b01100000; // PA0 -> ADC0, ADLAR=1 (8bit) ADCSRA = 0b11000100; // ADC prescaler at 16 } //=============================================================================== // //=============================================================================== void timePause(unsigned long count) { while(count--); } //=============================================================================== // //=============================================================================== AVRStudio><MANAGEMENT><ProjectName>AVR_oscilloscope</ProjectName><Created>04-Jun-2007 15:46:58</Created><LastEdit>05-Aug-2007 16:57:50</LastEdit><ICON>241</ICON><ProjectType>0</ProjectType><Created>04-Jun-2007 15:46:58</Created><Version>4</Version><Build>4, 12, 0, 491</Build><ProjectTypeName>AVR GCC</ProjectTypeName></MANAGEMENT><CODE_CREATION><ObjectFile>default\AVR_oscilloscope.elf</ObjectFile><EntryFile></EntryFile><SaveFolder>D:\avr 05-09-03\Projects\AVR_oscilloscope\</SaveFolder></CODE_CREATION><DEBUG_TARGET><CURRENT_TARGET>AVR Simulator</CURRENT_TARGET><CURRENT_PART>ATmega48.xml</CURRENT_PART><BREAKPOINTS></BREAKPOINTS><IO_EXPAND><HIDE>false</HIDE></IO_EXPAND><REGISTERNAMES><Register>R00</Register><Register>R01</Register><Register>R02</Register><Register>R03</Register><Register>R04</Register><Register>R05</Register><Register>R06</Register><Register>R07</Register><Register>R08</Register><Register>R09</Register><Register>R10</Register><Register>R11</Register><Register>R12</Register><Register>R13</Register><Register>R14</Register><Register>R15</Register><Register>R16</Register><Register>R17</Register><Register>R18</Register><Register>R19</Register><Register>R20</Register><Register>R21</Register><Register>R22</Register><Register>R23</Register><Register>R24</Register><Register>R25</Register><Register>R26</Register><Register>R27</Register><Register>R28</Register><Register>R29</Register><Register>R30</Register><Register>R31</Register></REGISTERNAMES><COM>Auto</COM><COMType>0</COMType><WATCHNUM>0</WATCHNUM><WATCHNAMES><Pane0></Pane0><Pane1></Pane1><Pane2></Pane2><Pane3></Pane3></WATCHNAMES><BreakOnTrcaeFull>0</BreakOnTrcaeFull></DEBUG_TARGET><Debugger><modules><module></module></modules><Triggers></Triggers></Debugger><AVRGCCPLUGIN><FILES><SOURCEFILE>AVR_oscilloscope.c</SOURCEFILE><OTHERFILE>glcd.c</OTHERFILE></FILES><CONFIGS><CONFIG><NAME>default</NAME><USESEXTERNALMAKEFILE>NO</USESEXTERNALMAKEFILE><EXTERNALMAKEFILE></EXTERNALMAKEFILE><PART>atmega32</PART><HEX>1</HEX><LIST>0</LIST><MAP>0</MAP><OUTPUTFILENAME>AVR_oscilloscope.elf</OUTPUTFILENAME><OUTPUTDIR>default\</OUTPUTDIR><ISDIRTY>1</ISDIRTY><OPTIONS/><INCDIRS/><LIBDIRS/><LIBS/><LINKOBJECTS/><OPTIONSFORALL>-Wall -gdwarf-2 -DF_CPU=16000000UL -Os -fsigned-char</OPTIONSFORALL><LINKEROPTIONS></LINKEROPTIONS><SEGMENTS/></CONFIG></CONFIGS><LASTCONFIG>default</LASTCONFIG><USES_WINAVR>1</USES_WINAVR><GCC_LOC>C:\WinAVR\bin\avr-gcc.exe</GCC_LOC><MAKE_LOC>C:\WinAVR\utils\bin\make.exe</MAKE_LOC></AVRGCCPLUGIN><ProjectFiles><Files><Name>D:\avr 05-09-03\Projects\AVR_oscilloscope\AVR_oscilloscope.c</Name></Files></ProjectFiles><IOView><usergroups/></IOView><Files><File00000><FileId>00000</FileId><FileName>AVR_oscilloscope.c</FileName><Status>257</Status></File00000><File00001><FileId>00001</FileId><FileName>glcd.c</FileName><Status>1</Status></File00001><File00002><FileId>00002</FileId><FileName>glcd.h</FileName><Status>1</Status></File00002></Files><Workspace><File00000><Position>359 85 1441 608</Position><LineCol>155 14</LineCol></File00000><File00001><Position>390 153 1356 496</Position><LineCol>6 32</LineCol></File00001><File00002><Position>359 82 1441 605</Position><LineCol>31 0</LineCol><State>Maximized</State></File00002></Workspace><Events><Bookmarks></Bookmarks></Events><Trace><Filters></Filters></Trace></AVRStudio> /* As graphic LCD used the DEM128064A model (128x64 pixels). Created by Serasidis Vassilis and finished at 03.Aug.2007 This code is ditributed under GPL licence. */ #include <avr/io.h> #include <avr/pgmspace.h> #define lcdrs 0 // LCD's RS pin is connected to Pin0 of AVR #define lcdrw 1 // LCD's r/w pin is connected to Pin1 of AVR #define lcde 2 // LCD's e pin is connected to Pin2 of AVR #define lcdcs1 5 // LCD's CS1 pin is connected to Pin5 of AVR #define lcdcs2 4 // LCD's CS2 pin is connected to Pin4 of AVR #define lcdrst 3 // LCD's RST pin is connected to Pin3 of AVR #define ctrl_port PORTB #define ctrl_port_ddr DDRB #define ctrl_port_pins PINB #define data_port PORTD #define data_port_ddr DDRD #define data_port_pins PIND void glcdInit (void); void createWelcomeScreen (void); void createRaster (void); void delayTime (unsigned long counter); void glcdWait (void); void eStrobe (void); void enable_cs1 (void); void enable_cs2 (void); void showTheWave (void); void changeLine (unsigned char data); void createWave (void); void fillDataLcdBuffer (unsigned char address, unsigned char data); unsigned char column = 0; unsigned char line = 0; unsigned char lcdBuffer[1024]; unsigned int lcdAddress = 0; unsigned int flashAddress = 0; static unsigned char dataLcdBuffer[128]; unsigned int backupLcdAddress = 0; const char LcdRaster[] __attribute__ ((progmem)) = { 255,1,1,1,1,1,1,1,1,3,1,1,1,1,1,1, 1,1,1,3,1,1,1,1,1,1,1,1,1,3,1,1, 1,1,1,1,1,1,1,3,1,1,1,1,1,1,1,1, 1,171,1,1,1,1,1,1,1,1,1,3,1,1,1,1, 1,1,1,1,1,3,1,1,1,1,1,1,1,1,1,3, 1,1,1,1,1,1,1,1,1,3,1,1,1,1,1,1, 1,1,1,1,255,0,0,0,0,0,224,80,72,80,224,0, 248,0,0,0,248,0,248,72,200,72,48,0,0,0,0,0, 255,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0, 0,0,0,8,0,0,0,0,0,0,0,0,0,8,0,0, 0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0, 8,170,8,0,0,0,0,0,0,0,0,8,0,0,0,0, 0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,8, 0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0, 0,0,0,8,255,0,0,192,32,32,35,0,192,32,35,32, 0,193,34,33,192,0,227,32,32,193,2,224,32,32,32,0, 255,0,0,0,0,0,0,0,0,32,0,0,0,0,0,0, 0,0,0,32,0,0,0,0,0,0,0,0,0,32,0,0, 0,0,0,0,0,0,0,32,0,0,0,0,0,0,0,0, 32,170,32,0,0,0,0,0,0,0,0,32,0,0,0,0, 0,0,0,0,0,32,0,0,0,0,0,0,0,0,0,32, 0,0,0,0,0,0,0,0,0,32,0,0,0,0,0,0, 0,0,0,32,255,0,0,72,73,73,70,64,71,72,72,72, 64,71,72,72,71,64,79,65,65,64,64,79,73,73,9,0, 255,128,0,128,0,128,0,128,0,192,0,128,0,128,0,128, 0,128,0,192,0,128,0,128,0,128,0,128,0,192,0,128, 0,128,0,128,0,128,0,192,0,128,0,128,0,128,0,128, 128,234,128,128,0,128,0,128,0,128,0,192,0,128,0,128, 0,128,0,128,0,192,0,128,0,128,0,128,0,128,0,192, 0,128,0,128,0,128,0,128,0,192,0,128,0,128,0,128, 0,128,0,128,255,0,0,152,164,160,152,132,164,152,0,0, 48,72,64,48,8,72,48,0,0,0,0,0,0,0,0,0, 255,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0, 0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0, 0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0, 0,171,0,0,0,0,0,0,0,0,0,1,0,0,0,0, 0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1, 0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0, 0,0,0,0,255,0,0,92,82,82,82,82,82,92,0,0, 161,161,161,161,161,161,189,0,0,224,32,64,128,0,0,0, 255,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0, 0,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0, 0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0, 2,170,2,0,0,0,0,0,0,0,0,2,0,0,0,0, 0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2, 0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0, 0,0,0,2,255,0,0,198,41,40,230,33,41,38,0,0, 140,82,16,140,66,82,140,0,0,25,164,164,164,165,165,25, 255,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0, 0,0,0,8,0,0,0,0,0,0,0,0,0,8,0,0, 0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0, 8,170,8,0,0,0,0,0,0,0,0,8,0,0,0,0, 0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,8, 0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0, 0,0,0,8,255,0,0,56,165,37,57,37,165,37,0,0, 49,74,74,121,72,74,73,0,0,99,148,20,36,68,132,243, 255,128,128,128,128,128,128,128,128,160,128,128,128,128,128,128, 128,128,128,160,128,128,128,128,128,128,128,128,128,160,128,128, 128,128,128,128,128,128,128,160,128,128,128,128,128,128,128,128, 160,170,160,128,128,128,128,128,128,128,128,160,128,128,128,128, 128,128,128,128,128,160,128,128,128,128,128,128,128,128,128,160, 128,128,128,128,128,128,128,128,128,160,128,128,128,128,128,128, 128,128,128,128,255,0,0,99,148,132,103,20,148,99,0,0, 17,17,17,17,17,10,4,0,0,60,66,90,82,90,66,60}; const char welcomeScreen[] __attribute__ ((progmem)) = { 255,1,1,1,1,225,33,33,33,33,33,33,33,33,33,33 ,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33,33 ,33,33,33,33,33,33,225,1,1,1,1,1,1,1,1,1 ,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1 ,1,1,1,1,1,1,193,225,49,25,25,49,225,193,1,1 ,249,249,1,1,1,1,249,249,1,1,249,249,25,25,25,57 ,241,225,1,1,1,1,1,1,1,1,1,1,1,1,1,1 ,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,255 ,255,0,0,0,0,255,0,0,0,17,0,0,0,17,0,0 ,0,17,0,0,0,0,85,0,0,0,17,0,0,0,17,0 ,0,0,17,0,0,0,255,0,0,0,0,0,0,0,0,0 ,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ,0,0,0,0,0,0,127,127,12,12,12,12,127,127,0,0 ,15,31,48,96,96,48,31,15,0,0,127,127,6,6,6,15 ,123,113,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255 ,255,0,0,0,0,255,0,8,0,73,0,8,0,73,0,8 ,0,73,0,8,0,8,93,8,0,8,65,8,0,8,65,8 ,0,8,65,8,0,8,255,0,0,0,0,0,0,0,0,0 ,252,254,2,254,252,0,156,190,34,238,204,0,252,254,2,14 ,12,0,0,2,254,254,2,0,254,254,0,0,0,0,254,254 ,0,0,0,0,252,254,2,254,252,0,156,190,34,238,204,0 ,252,254,2,14,12,0,252,254,2,254,252,0,254,254,34,62 |