Technology and mechanics

ATmega8 AVR 8-BIT Microcontroller

2009-02-19T17:00:00.002+07:00

CMOS RISC, ATmega8 AVR 8-BIT Microcontroller, In-system Programmable with Flash code storage, re-programmble up to 1000 times. Features 32 working registers, single clock cycle execution giving up to 1MIPs/MHz. Features

* 8K BYTES of In-System Programmable Flash
* 512 Bytes EEPROM, Endurance: 100,000 Write/Erase Cycles
* Optional Boot Code Section with Independent Lock Bits. In-System Programming by On-chip Boot Program
* 1K Bytes SRAM
* Analog Comparator
* Watchdog
* SPI
* Two 8-bit Timer/Counters with Separate Prescaler, one Compare Mode
* One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture Mode

* Real Time Counter with Separate Oscillator
* Three PWM Channels
* 6-channel ADC -Four Channels 10-bit Accuracy and Two Channels 8-bit Accuracy
* Byte-oriented Two-wire Serial Interface
* Programmable Serial USART
* Master/Slave SPI Serial Interface
* Power-on Reset and Programmable Brown-out Detection
* Internal Calibrated RC Oscillator
* External and Internal Interrupt Sources
* Five Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, and Standby
* 23 Programmable I/O Lines
* 4.5 to 5.5V operation

cutting material for conventional machine

2009-02-19T16:28:00.003+07:00

huy... this time i want to tell you about cutting tool in conventional machine.
cutting tool in conventional machine is divide by four substance

1.Steel
Steel with carbon >= 1%
Not put up with high temprature. In 200'C degree, steel will be less hardness.

2. HSS (High Speed Steel)
Combination with chromium or molibdenum
Endure up to 550'C degree
Cutting speed up to 3x cutting speed steel

3. STELIT/REXALLOY/ARMALOY/TANTUNG
It's not steel, combination with chromium, tungsten, carbon, and nickel.
This product is small, sharp.
We put on the tip stem knife. with brazing
Endure up to 800'C degree, with cutting speed 50-70% HSS cutting speed

4. Carbide
Combination with tungsten carbide and cobalt, or mixed tungsten carbide, tantolium carbide, titanium carbide with cobalt.
Set same as STELIT
Endure up to 925'C degree, with cutting speed 2-4x HSS cutting speed

5. Ceramic
Made by alumunium oxide or silicium dioxide.

Ponyprog AVR

2009-02-17T18:38:00.005+07:00

huy.. kali ini saya akan menjelaskan suatu software yang sangat menarik untuk anda yang senang berkecimpung dalam dunia mekatronika. software yang akan saya perkenalkan adalah software ponyprog. software ini berguna sebagia penghubung antara mikrokontroller dengan komputer anda. caranya dengan menghubungkan mikrokontroller anda dengan komputer dengan menggunakan serial port cable. nah setelah itu masukan program anda untuk mikrokntroller tersebut. biasanya menggunakan bahasa c, c++, basic, fortran, atau bisa juga dengan software ldmicro.

kalau anda benar benar tertarik, anda dpat mengisi comment saya dan menuliskan alamat e-mail anda, saya akan segera mengirimkan tutorial trsebut ke e-mail anda berikut programnya. ini GRATISSSS!!!!...
semua untuk membantu anda yang senang dengan robot.

selamat mencoba!!

Robot Rover

2009-02-15T22:26:00.004+07:00

Every week we meet at this spot to share news of another new gadget or two. With this year-end column we begin a new tradition - The G-Spot Gadget of the Year.

There's no monetary prize for the inventor. No regal ceremony in some snow-laden Scandinavian country. I simply take a look back at this year's columns and pick the gadget I think was the best of the lot.

This was a big year for The Gadget Guy family. We got two new dogs in 2008. The corgi pup lying on my living room rug is Chip. He's extremely loving, constantly runs to our front door to bark at nothing and has a running feud with a parked Jeep across the street.

The other pooch is Wrex The Dawg. Robots were big in the gadget world this year, and Wrex, a personable and very mechanical version of a junkyard dog, wins 2008's Gadget of the Year honor.

Wrex (originally priced by Wowwee at $150; currently available for $50 at Amazon.com) does everything you'd expect of a real dog: He plays, begs, swivels his ears, turns his head and even cocks his leg while making peeing sounds.

Since he's a cartoon-like robot, he'll also act like a cat when you smack his "bump button nose," and he can rotate his eyes like a slot machine. His moods include happy, crazy or "junkyard dog" angry.

Chip performs no tricks, though he loves to fetch. Wrex performs any of 80 movements or tricks as directed via remote control. He can also roam freely, avoiding obstacles and reacting to things around him.

Wrex faced tough competition for the title of Gadget of the Year (all of which you can re-read in the archives at ColumbusAlive.com).

He beat out Heartland America's Lover's Cushion, which promises no less than the best sex ever; GPS lingerie from Brazil; the 195-mph Lamborghini Gallardo Spyder I test-drove; the Clear card that legally lets you line-jump at airport security checkpoints (not including Port Columbus); the DTV converter box you better attach to your analog TV by Feb. 17; and the Toto Washlet Toilet with its heated seat and the mechanics to wash and dry your sorry butt.

But in the end, thanks to Wrex, 2008 proved to be the year of the robot dog.

PROTEUS

2009-02-12T00:58:00.005+07:00

satu lagi info menarik dari saya mengenai robot. mungkin kamu sudah pernah dengar bahwa rangkaian circuit pada PCB bisa di buat oleh software, seperti protel, eagle, orcad, dan masih banyak lagi.
sekarang saya ingin memperkenalkan software baru buat para "techer" (sebutan untuk pengunjung setia blog ini). yaitu software yang bernama PROTEUS. saoftware ini lebih canggih lagi.

ya satu level dibawah labview. kelebihanya adalah bisa buat simulasi program mikrokontroller. dan lebih mudah penggunaan untuk orang awam.
tapi yang jelas kamu harus menentukan mana software yang kamu pilih. karena kamu harus fokus pada stu program sehingga kamu menjadi handal.

saya punya link untuk download tutorialnya buat kamu yang belum mengerti.
tutorial

good luck.

Abu robocon 2009

2009-02-10T19:53:00.006+07:00

Abu Robocon in tokyo make a theme "travel together for the victory drums". its very interesting for us to see the action of a brain robot.
the assignment is how the robot action go along the way with carry a "kago" run over the obstacle.
kago is a traditional Japanese palanquin or litter of the pre-modern era. People were often carried in Kago to distant places. The Kago was a basket suspended from a wooden pole, called here the Shoulder Pole, as shown in the photo. It was carried by two men, one in front and the other behind.
Travel in olden times was far from smooth. There were mountains, steep slopes, and sharply winding roads to traverse. The bearers who carried the Kago had to cooperate very closely to reduce the sway and complete the journey safely.

i hope Indonesia can give the best performance and bring the medal to indonesia

ATmega8 circuit

2009-02-10T18:30:00.003+07:00

huy, i have a circuit which use atmega8 micro controller, it's simple for you to make a circuit with proteus program and program with ldmicro, and then compile your program using ponyprog serial data software. its very cheap, and very easy to use. good luck

DOHC

2009-02-10T01:41:00.001+07:00

Once, a method of engine design. Today, a triumph of marketing.

Auto manufacturers (primarily the japanesse) appear to have convinced many people that DOHC (Dual OverHead Cam) engines are new, high-tech, and cool. In fact, many European manufacturers have used them for decades. I personally owned a 1974 Fiat (not exacly a luxury or exotic car) with a DOHC engine, and there was nothing esoteric about it.

There also seems to be a notion about that DOHC implies > 2 valves/cylinder. Again, nothing could be farther from the truth. The advantage of a DOHC engine is not the number of valves you can drive, but their placement. Even in a "conventional", 2-valve-per-cylinder engine, a DOHC design allows the valves to be placed in such a way that the flow of the gas-air mixture through the combustion chamber can be optimized.

The other advantages of a DOHC design are

less friction than an OHV(p) design,
fewer moving parts than a pushrod design, and
the ability (in some engines) to have different valve timing on the intake and exhaust valves.

It should be noted that there are really two "flavors" of DOHC design; in a four cylinder, 8-valve engine, typically one drives the intake valves and the other drives the exhaust valves. This scheme can be extended to 16-valve, 4-cylinder designs trivially. In a V-6, -8, or -12 engine with two banks of cylinders, each camshaft will generally drive all the valves in one bank of cylinders. This type of design might more properly be called a "double-SOHC" design, but in practice this distinction is very seldom made.

drum brakes

2009-02-10T01:33:00.000+07:00

Cars are often equipped with drum brakes in the rear and disc brake in the front for cost reasons. Drum brakes are cheaper for the manufacturer to install.

Drum brakes work on the same principle as disc brakes. Shoes push against a moving surface and the friction lowers the rational speed of the wheel. The basic construction of a drum brake is a cylinder (the drum) which contains two brake shoes and a piston. The drum rotates on the same axis as the wheel. The shoes face the inside of the cylinder and the piston sits between them. There are also a number of springs in place to pull the shoes back away from the drum when the brakes aren't active and some levers for the emergency brakes.

When the brake pedal is pushed, brake fluid from the master cylinder enters the piston and forces the shoes apart, pushing them against the drum. The emergency brakes system is much easier to implement in cars with drum brakes. The power for the braking comes from a cable which, when pulled tight, forces the brake shoes apart. This is important, since emergency brakes must operate even if the hydraulic system isn't functional.

The brakes are located on the inside of the wheels (where the tire is attached), and are attached to the hub. The brakes have many parts inside, the most obvious of which are the shoes. They are semicircular bits of metal with pads on the outside. At one end, they will be connected by the piston, and at the other by the adjuster mechanism.

Drum brakes lose effectiveness in sustained braking because they quickly overheat. Disc brakes run much cooler comparatively, and will be much more effective at slowing you while going down hills. The danger of overheating means that drum brakes must have less braking power than a disc brake. Disc brake can put a lot more hydraulic force into stopping the car without damaging the brakes or fading.

Because friction is involved in this braking system, there will be wear. It is important to keep the gap between the drum and the shoes constant, so that there is no noticeable change in the action of the brake pedal. Modern drum brakes have a self-adjusting mechanism that automatically moves the shoes closer to the drum as they wear. As shoes wear out, a small metal bit touches the drum, making a squeaking noise while braking lightly. This is an indication that the shoes will need to be changed soon.

If the brake shoes are replaced at the proper time (before they are completely worn away), they should be the only thing that will need servicing. Generally, it is a good idea to replace the shoes when there is between 1/32" and 1/16" of material left. If the shoes are allowed to remain in poor shape for too long, rivets in the shoe may gouge the inside of the drum, producing unpleasant noises, and less effective brakes. Contamination due to oil or other fluids or erosion due to burning are also factors in brake wear. Sudden, heavy braking greatly increases wear and can burn the surface of the shoes or the inside of the drum.

Fun With Piezoelectric Film

2009-02-10T01:30:00.001+07:00

Piezo-electricity, directly translated means pressure electricity. The root word Piezo is derived from the Greek word piezein, meaning to press tight or squeeze. The balance of the term, is electricity. Put the two together and we arrive at squeezed electricity. So, if content follows form then piezoelectric materials when squeezed generate electricity. And that's true.
In this article we will experiment with a unique piezoelectric material, piezoelectric film.
The piezoelectric effect was discovered by Pierre and Jacques Curie. In 1880 the Curie brothers published a paper on the piezoelectric phenomena and crystallographic structure of tourmaline, quartz, topaz, cane sugar and Rochelle salt.

Servobotics Robotic Arm Model RA-02

2009-02-10T01:28:00.000+07:00

The RA-02 Robotic Arm teaches basic robotic principles. The RA-02 kit includes all components necessary to build the robotic arm shown at left.The robotic arm kit also includes the SMC-05 servomotor controller kit. The servomotor kit includes the pcb and all components necessary to build the servomotor controller (soldering is required). Using the 5-position servomotor controller see picture below one can control the robotic arm using the onboard three position switches to manually to grab, lift, lower, wrist rotate and pivot.In addition the Windows (98/XP) control software Free Download Available! allows PC control through one of your PC's serial port. The windows program has a script writing feature that allows one to program the robotic arm with thousands of movements with full, precise and repeatable control of each movement. Scripts may hold a maximum of 10,000 movements (including pauses) with a maximum repetition of 10, 000.