what kind of modifications u need? nth much can do with the mosquito repeller. Unless u add those features like timers to turn off and on.

this thread should be pinned!!!
highly recommended!!

Hey, can anyone tell me how much ROBOSAPIEN is selling in KL? Here in Johor its selling for RM300++. Wondering if thats the appropriate price?

Erm..

Wanna ask, have anyone here like to invent sumthing new, like wut Im doing(refer to the pict)

Well, anything that involve a little wires, chip, rc....anything,

If u do, plzz share ur exp here


Attached thumbnail(s)

err wats tht dude its like a tank!:D

WOW! This thread is like soo cool! I didn't know there were electronic and roboticts enthusiasts in Malaysia.

I am actually interested in robotics and have quite a few robotics books, but i've never actually built a robot before. The main reason being the enourmous amount of money it costs.

By the way, I'm from Sarawak! Not all of us live in trees ( well the ones that do have elevators, LOL)

Hi guys.Im currently intrested in learning the PIC.Anyone here has a idea what kind of PIC programmer that available that I can easily get.I got one from Jalan Pasar but it is a hobby kit thingy and you have to build it urself, I build it but not working maybe I spoiled it during soldering .Also I tried searching the net but not sure which one to buy.Anyway thnx for the time

This post has been edited by Wavelength: Feb 16 2006, 10:39 PM

For PIC programmer, last time I used WinPic http://www.qsl.net/dl4yhf/winpicpr.html
I suggest you to make a second attempt to build yourself.
The basic blocks you need are

1) 5V power supply (built from an AC-DC adapter, connector for DC power jack, 7805 regulator + electrolytic capacitors)

2) Parallel port connector + 4 to 6 wires of 1 meter each

3) Protoboard and the PIC chip

4) Supporting circuit. I can design a simple one for you, after you tell which PIC chip you want to program. Generally there are two solutions. One is using a logic chip that can tri-state eg. 74HC244. The other is using a few NPN transistors and a few resistors. Then recently I tried a third solution, throw away all the supporting circuit stuff and connect directly to the parallel port, utilising the bidirectional data capability. We cannot use WinPic in the third solution but I wrote my own program. In the third solution, the only components needed are three 220pF capacitors.

Since most of the PICs have two programming modes, first one requires 13V but the second mode doesn't require, we don't need to provide 13V. The supporting circuit is really simple. All you need to do now is get the items 1) 2) 3) above ready, then state the part number of your PIC chip. And whether you choose solution one: logic chip; or two: npn transistors, eg C945, C9013, BC547, 2N3904

Cool...Im thinking of programming the PIC16F84A and I'll choose the NPN transistor solution cause I have few of the 2N3906 around.But before that I got a few dumb question

1) The 5V power supply can I just hook up 4 X 1.5 AA bateries?
2)Protoboard?Project board or the PCB?

Thnx for the trouble .

This post has been edited by Wavelength: Feb 17 2006, 08:07 PM

2N3906 is PNP.

5 volt. Stressing the chip with 6 volt is not good. The datasheet recommends the maximum operating suppy voltage to be 5.5V. Lowest is 4.0V. Three batteries maybe? If you use NiMH batteries, the voltage per cell is about 1.25-1.45. For alkaline, 1.10V for low battery condition to 1.60V fresh from package. As you can see one cell is not 1.5V fixed, using a voltage regulator is almost a must.

When using LM7805 regulator, you need at least 7V input to the regulator to get 5V output.

Breadboard (also called protoboard) - project board.

I'm a bit busy for this few weeks. So I don't have time to test an NPN transistor solution. Probably have to wait for a week or so.

i recently build a PIC programmer for my PIC16F following the instruction on this website

myke's elcheapo

i havent try the programmer i build yet. anybody tried this circuit before??

it's relatively cheap and easy to built.

I built a PIC progammer last time but fail..lol..

but it is more simple to build an Atmel AT89S8252 progammer.

For 5V, u can buy those normal adaptor that output 9V or 12V, then cut out their wire and hook to 7805 regulator.

if ya don't mind me asking, what does a PIC programmer do and what is it used for?

This post has been edited by NOS4R2: Feb 19 2006, 07:43 PM

Yeah, Its a tank actually. Just make it for fun.

Yeah, ca anyone tell us more bout it? I mean, in a simple explanation.

And, which part of Selangor/Kl that I can find a lot of electronic thingy?

I mean, like transistor, capasitor, NE55 chip, erm...solar panel, gear box..

i do believe that the DIY Amp thread in Audiophiles is where you should be asking these types of questions. i'll try to answer all questions that you have regarding DIY amps since i've built a few of DIY amps before this. the SOHA is the most recent ones (built a few of these) :




the SOHA build thread here.
the Gainclone resources here and here.
hope to see you more in the DIY Amp thread if you're really interested in these types of DIY.

I now searching 2 robot for my referance, line follower robot and wall detector robot, I want to buy from forumer here that got these 2 robot. Offer me your best price. The robot is mainly powered by PIC16F84.

I want:

1. complete line follower robot project + overlall PIC discription language, include the definition of the language process. + complete circuit diagram.

2. Wall follower robot, and complete set of language as above + circuit diagram.
This robot is complete project for ultrasound sensor or similiar, such that will avoid a wall if it near to it, so that it will follow the wall nicely without hit it.

PM me your best price. I take all COD at Lowyat Plaza.

Thank you everyone

This post has been edited by cafuheva: Feb 20 2006, 12:39 AM

Generally you can modify the circuit with

- A timer.
- Power saving.
- Solar Cells with a comparator and battery.
- Mabye a boost function for those nyamuk Gajah.

Erm, anyone there willing to tell me more bout PIC? and, where can I find electronic stuff here in kL or Selangor?

PIC programmer is a thing to progamme the firmware u write into PIC microcontroller by Microchip company.

Microcontroller is an IC that can be used to control external hardware.

Go to Pasar Road to find electronics components or u can visit Farnell or RSMalaysia to purchase.

I guess this is ur FYP. Do it yourself lah, if not u will regret later.

Give u some ideas.

1) The robot mechanical build no need to be so complicated. A remote control car look alike will do.

2) for line follower robot, use infrared sensor. Put it below the robot. For wall detective robot, well, u can use ultrasonic sensor.

For the circuits of those sensors, i think u can find it by googling it. Use ADC to get the sensor input then control the movement of your motor. What so hard about it?

Just put some effort to work out the flowchart of the system then ask some1 to teach u to write the firmware lah.