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3/29/2010
3/20/2010
ATmega48/88/168 Development Board
The development board consists of:
1. ATmega AVR microcontroller in DIP28 package
The development board is designed to use ATmega48 with 4kB flash memory or ATmega88 (8kB), ATmega168 (16kB). New version of these microcontrollers ATmega48P/88P/168P and ATmega328P (with 32kB) are pin compatible with old version, so they can be used also.
External crystal X1 is placed in socket, so it is easy to change it or remove it. If internal oscillator is used...
Controlling Stepper Motor with a Parallel Port
Controlling Stepper Motor with a Parallel Port Scheme
Controlling Stepper Motor with a Parallel Port Physical
This is an easy to build stepper motor driver that will allow you to precisely control a unipolar stepper motor through your computer's parallel port. With a stepper motor you can build a lot of interesting gadgets such as robots, elevator, PCB drilling mill, camera panning system, automatic fish feeder, etc. If you have never worked...
Circuit diagram for CCTV by Solar Panel
Below is the circuit used to power the CCTV camera, provide lighting inside the nestbox, and charge batteries from a PV solar panel.
Circuit diagram for CCTV powered by Solar Panel with Battery Backup
D1 is a Schottky Diode used to prevent battery charge escaping through the solar panel at night. Something like a 1N5817 (1 Amp 20 Volt diode) will do the job and it has a very low voltage drop of under 0.45 Volts. D2 and D3 are ultrabright LEDs used...
Description of the serial programmer:
The programmer is quite simple and it is based on the SI-Prog from the author of PonyProg software. The Zener diodes D2, D3 with the resistors R2, R3 reduce the voltage from the ouput pins DTR, RTS on the serial port to around 5V which is suitable for microcontroller (MOSI, SCK). MISO signal is connected directly to the input CTS pin. The Zener diode D1 with the resistor R1 drive the NPN transistor T1, which controls RESET signal. The AVR microcontrollers...
AVR PROGRAMMER FOR MICROCONTROLLER
This simple AVR Programmer will allow you to painlessly transfer hex programs to most ATMEL AVR microcontrollers without sacrificing your budget and time. It is more reliable than most other simple AVR programmers available out there and can be built in very short amount of time.
AVR programmer consists of in-circuit serial programmer (dongle) and small pcb with a DIP socket where you can fit your microcontroller and have it quickly programmed.
You...
PIC Universal Programmer Schematic
The signals from a parallel port is standard TTL and being "abused" by their journey on the cable connections, they are reshaped by inverters contained in IC1. As this circuit has open collector outputs it allows easy control of three transistors T1, T2 and T3. T1 and T2 allow the application of high programming voltage VPP legs adequate support universal programmer. T3 controls the normal supply voltage VDD applied also to the universal support.
This...
The 640 MIC circuit
The 640 MIC circuit
This tour, available in Stainless DIL 8 legs, can measure 4 analog voltage independent between 0 and 5 volts, and send the result of this measure in the form of four characters on a standard asynchronous serial link. Its serial output is directly TTL or CMOS compatible and can be connected to a serial input RS 232 by simply adding a resistor.
The MIC 640 can operate in automatic mode, thus sending the result of four steps every...
3/19/2010
Kumpulan Kata-Kata Bijak
Beberapa Kata-Kata Bijak Hasil Pencarian dari Berbagai Sumber
Kejujuran adalah perhiasan jiwa yang lebih bercahaya daripada berlian
Belajar tanpa berpikir tidak ada gunanya, sedangkan berpikir tanpa belajar adalah berbahaya.
Cinta kepada Allah adalah puncaknya cinta. Lembahnya cinta adalah cinta kepada sesama.
Keluhuran budi pekerti akan tampak pada ucapan dan tindakan.
Orang yang berjiwa besar teguh pendiriannya, tetapi tidak keras kepala.
Ulurkan cintamu karena Tuhanmu dan tariklah cintamu karena Tuhanmu, anda tentu tak akan kecewa.
Cinta...
