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Additional resources for Central Electronics 200V Broadband Transmitter- Exciter (voltage chart)
3 V LDO voltage regulator, button and LED (Figure 5). The node board is used to make a sensor unit using an iDwaRF module. The circuit (Figure 6) includes an LDR as a light sensor, an LM75 temperature sensor, an (optional) AT45DB801D serial flash memory, a button and an LED. 3 V LDO voltage regulator. The two printed circuit boards (Figure 7 and Figure 8) are chiefly populated using SMD components. Figure 9 shows the boards with iDwaRF-168 modules fitted. Figure 8. The node board converts the iDwaRF module into a complete sensor unit.
Resistors R6 and R7 provide current limiting in case of problems. They also have the pleasant erating annoying problems due to static charges if they left open. The circuit also has a temperature sensor (IC2). This is a ‘1-wire’ chip, which means that only one I/O pin is necessary to use the sensor. The input options are rounded out with five pushbutton switches. The circuit is fitted with an LCD that is driven using four data bits and the 5V 2 1 3 S1 1 S2 S3 5V S4 S5 C5 C4 C1 100n 100n 22u 20V 12 13 14 D5 D6 D7 9 11 10 D4 8 7 4 3 2 1 6 1k K4 PROG D2 1 DIGIN5 POWER GND GND MOSI GND 5 9 GND P1 DIGIN3 DIGIN4 10 8x 100k EN 8 5V 5V R/W 7 DIGIN4 100n R2 DIGIN2 10k RS DIGIN3 AIN3 DIGIN1 10 5 6 8 DIGIN1 DIGIN2 LCD K5 C6 AIN2 6 4 9 AIN3 5V 7 AIN3 GND 5V AIN1 MISO 3 SCK 2 AIN2 4 AIN1 AIN2 DIGIN5 1 C3 47u 20V 2 AIN1 2 3 4 5 6 7 8 9 5V K2 1 R3 3 1N4001 2 S1 5 S2 RESET S3 S4 D1 3 S5 IC1 MC7805BT K1 GND GND 5V 5V 5V 5V R1 R4 1k K3 1k R5 1 8 68 3 R7 D- 14 D+ 15 68 D3 16 6 5 DIGIN2 17 ONEWIRE 18 GND 5V 19 20 DIGIN5 21 RESET 9 IC3 PB7 (SCK) PA7 (ADC7) ATmega32-16PC PD0 (RXD) PC0 (SCL) PD1 (TXD) PC1 (SDA) PD2 (INT0) PC2 (TCK) PD3 (INT1) PC3 (TMS) PC4 (TDO) PD4 (OC1B) PC5 (TDI) PD5 (OC1A) PD6 (ICP) PC6 (TOSC1) PD7 (OC2) PC7 (TOSC2) 38 AIN3 37 S1 36 S2 35 S3 34 S4 33 S5 Re2 X1 D6 D7 D8 D9 D10 NC D11 NO 22 RS LED1 1 23 R/W LED2 2 24 EN LED3 3 25 DIGIN1 LED4 4 26 D4 LED5 5 27 D5 MOSI 6 28 D6 MISO 7 29 D7 SCK 8 IN1 OUT1 IN2 OUT2 IN3 OUT3 IN4 OUT4 IN5 OUT5 IN6 OUT6 IN7 OUT7 IN8 OUT8 GND K Re3 18 K8 17 COM 16 NC 15 NO 14 13 Re4 K9 12 COM 11 NC NO 10 Re5 ULN2803A K10 COM R10 C9 GND 12MHz NO 100k C8 18p NC C7 S6 RESET 3/2007 - elektor electronics D5 IC4 RESET GND K7 COM D4 9 RESET 1 32 PA6 (ADC6) 11 10k 30 PB6 (MISO) GND R8 DIGIN3 DIGIN4 PA5 (ADC5) NO 2 SCK PA4 (ADC4) PB5 (MOSI) 3 7 PA3 (ADC3) PB3 (AIN1/OC0) PB4 (SS) 4 MISO PA2 (ADC2) NC 5 6 PB2 (AIN0/INT2) COM 39 AIN2 6 5 MOSI PA1 (ADC1) 7 LED5 PB1 (T1) 40 AIN1 8 4 PA0 (ADC0) 9 LED4 AREF 3 AVCC LED3 R6 2 4 2 Re1 K6 PB0 (XCK/T0) XTAL1 5V LED2 8x 470 13 GND 1 R9 XTAL2 DS1820 LED1 12 1 ONEWIRE 31 DQ GND 2 VCC 100n GND IC2 10 4k7 3 C2 100n 18p GND 060276 - 11 35 HANDS-ON USB DESIGN property of reducing reflections on the data lines, which helps reduce errors.
There an LED for each relay to indicate whether the relay is actuated. The USB port is extremely simply with regard to the electronic components. Resistor R4 causes the host to recognise that a Low-Speed device is connected to the USB port. Resistors R6 and R7 provide current limiting in case of problems. They also have the pleasant erating annoying problems due to static charges if they left open. The circuit also has a temperature sensor (IC2). This is a ‘1-wire’ chip, which means that only one I/O pin is necessary to use the sensor.