I am not sure wherter I have put this at the right place but nevermind lets have a start for Electronic Talks! wohohoh Please feel free to share your designs or findings here ....


Electronics-DIY-Designs:
http://www.elecdesign.com/index.cfm?AD=1&
http://www.electronic-circuits-diagrams.co...its_index.shtml
http://www.electronicsinfoline.com/

Electronics-Suppliers(online only):
http://www.elexp.com/
http://www.farnellinone.com/
http://www.rsmalaysia.com/cgi-bin/bv/home/...sp?cacheID=myie
http://www.semiconductors.philips.com/
http://www.omron-ap.com.my/
http://www.national.com/
http://www.atmel.com/

Electronics-Forums:
http://forum.allaboutcircuits.com/
http://www.dutchforce.com/~eforum/index.php
http://www.electronicspoint.com/
http://www.eng-tips.com/

Electronics-Tutorials:
http://www.iguanalabs.com/maintut.htm
http://www.opamp-electronics.com/tutorials/index.htm
http://my.integritynet.com.au/purdic/
http://www.electronics-tutorials.com/
http://www.discovercircuits.com/list.htm

Electronics-ROBOTICS:
http://www.eng-tips.com/
http://robotics-design.com/homeselect.htm
http://www.galileo.org/robotics/design.html
http://www.roboticsonline.com/
http://endtas.com/robot/
http://www.astromech.net

Electronics-MicroControllers
http://www.microchip.com

Electronics Simulation Tools
http://www.linear.com/designtools/softwareRegistration.jsp

(some of the designs and articles are copyrighted. Any re-usage should inform the owner before any other action is done. Please respect the originality)

==Open Source will be our home for Tomorrow==

This post has been edited by jhcj: Jul 28 2008, 12:11 PM

whoa..... no one comes in T_T

To most of us, electronics means work lol, and not all our designs are good lol

lol not necessary need to be good mar as long as it bring some levels of interests ...heheh...^^ something like remote control doorbell will satisfy me lol

O_O coolness!! too bad I dunno where to get the electronic stuff like Gadget House, etc lolx

wow...the link u give is very interesting...may use some of idea for final project..haha

Microchip
http://www.microchip.com : Can get free IC samples at http://sample.microchip.com/ - microcontrollers can be fun too. Need sufficient free time though.

For beginning, one might directly use designs available. The next step, you will find yourself only taking the concept and atempting to use different parts or trying to simplify sections... haha.. many things to discover in electronics

wohoohoh....becareful about the copyright dude make sure no one discover it lol

@faust yea as long as the interest is there....other things can be easy

chowsc..

great idea.. i think the aquarium board also started by you rite?

anyway nice addition.. thinking about starting into DIY electronics myself..

@amy test Thanks dude yea i am in the aqua. thread too

yeap hope tht more and more ppl will get into DIY work...no matter how big or how small is it It is really fun ....

the last electronic device i designed was a nuclear detonator lol.....hmmm....or was it a crappy power filtration and stabilization circuit.

erm...wan ask is the site urs??

juz wan try use some idea la...i think sure can lo....

Anyone know whether Malaysia got PCB manufacturer that accept really low amount (perhaps < 5) order ?

errrr....may i ask what ur job ar?

wahh i m not that geng ...man

not my site ^^ just some of my favourite in my collection...u may use them at any means...but just haveto show ur respect to them heheh

u can get from RS malaysia but the price would be much higher for non-bulk purchase call them ....

Errrr ... RS only sells readily-printed PCB right?
What I want is to have a factory to produce some PCBs base on the circuits I provide.
Hate to use those veroboards sometimes. Damn ugly

hey..didnt realize this thread is open..hehe..welcome electronics hobbyist..yeah..

yeahhh!! dude! lets discuss more ....hermmm anyone has suggestions what to discuss to bring up the interest? the field is just too wide !!

The only design i made is twin led connect to battery. but that one also the led burn out because i put 9V battery.

Hmm.. wonder how many of you have personal computers with (printer) parallel port and (RS-232) serial port. The future will be without those while I am still relying on parallel port a lot. Programming microcontrollers and flashing Nokia 3310 firmware.

I'm now looking at Microchip's microcontroller with USB support. Thinking of playing with USB. Can anyone tell where to get USB connector? Perhaps I start by making a smart card reader that plugs into USB. Yeah, I'm also looking for smart card connector.

As what i know, many still now using parellel port coz using usb port must know how to create the driver..serial wor~~

here got some interesting things to share...spotted a robot site...quite interesting....check it out...

http://www.gizmag.co.uk/go/4573/1/

lol aiyak....u put there for long huh? and whats the purpose to put led there? torch light ?

aiks..usb smart card reader....pretty interesting its easy to get a smart card reader here..but usb type...havent seen any yet

Easy to get smart card reader? Can talk about it in more details? I want to know how much do I need to pay to get one. Not USB then what? Serial port, not available to some computers.

hi , ppl out there...I am trying to find an auto gate system to add on with my remote control. i try to find an auto gate system which can apply with this remote but couldn't find any..THis is my remote-control circuit website...Hope ppl out there can help me.

http://www.redcircuits.com/Page55.htm

http://www.smartcardfocus.com/shop/ilp/se~...6/p/index.shtml (USB or build-in)

http://www.didya.com/

http://www.smartcardfocus.com/shop/ilp/se~...6/p/index.shtml (serial)

http://www.smartcardfocus.com/shop/ilp/se~...6/p/index.shtml (cards only)

^^you can find some other brands like this in Jln Pasar but they are all made in China... choose wisely as they don't provide warranty sometimes normally around RM80-150, but depends on brand Some are over RM200 from what i saw last time

This post has been edited by chowsc: Jan 4 2006, 08:28 AM

u mean u want an actual circuit for an auto gate that we use at home?

MORE circuit MORE robots please

Last time i built a remote control car controlled using computer through parallel port interfacing. I even interface it using normal gaming Steering, wheel and pedal too . I used VB to build its software. It was one of my college assignments.

As for USB interfacing, u can try acquire USB development kit. One of my friends built USB device application using 'Cypress USB development kit'. I don't know much about Microchip USB development kit, i only know how to use PIC 16F84 only . Can someone highlight it here


P/s: Right now i am in middle of developing a small autonomous robot as my part time hobby. Is there any robot freaks here ?

Resource for free components sample (read: FREE!!)

huhhuhu samples huh

cool man............your sharing would be appreciated

huhuhu samples...

Microchip - deliver using FedEx. good, but don't misuse it.
Analog Devices - not for Malaysia. But if you have an address in USA...
Maxim/Dallas Semiconductor - using normal mail. But I didn't receive my order a month ago.
National Semiconductor - no response. and I didn't bother to email them.
Fairchild Semiconductor - no response
Texas Instruments - using a courier service, comes in a box. Even give you expensive digital signal processors.
Cirrus Logic - didn't try
Linear Technologies - didn't try
Freescale (previously Motorola) -didn't try
ON Semiconductor - no response
Intel - I actually got samples of flash memory chips. But that is only available at that time.


Vishay - call my handphone and ask for purpose. No samples for non-commercial projects. (no money return no talk)

RTI Electronics - I got a few thermistors
Coilcraft - E-mailed to ask about student policy. Seems complicated - leceh
Cooper Electronic Technologies - only ordered printed catalog. and I received it.

i stumble upon this just now, might intrest some of you
www.astromech.net

omg! ^^ can build own R2 huh!

Segway DIY http://www.tlb.org/scooter.html
Anybody up for the job?

oowww not this again....my uni. is fond to this stuff...~_~ saw a lect. riding on it in front of Siti Hasmah few months back....

I read about this some time last year. The total cost is killing, especially here in Malaysia. Still cheaper than a true 'ginger' though.

hehehe nobody here is going to build that scooter like machine i think...too pricey and no true value ^^

bump bump more robots more electronics more led please!

bump bump bump!

woohoooo elec....tronic !

Can bump one meh?

How much is the cheapest digital multimeter sold at Jalan Pasar shops? I bought the DT-830D in Kuantan for RM15 last time. Now see Carrefour sells it for RM60. Now thinking of buying a cheap digital multimeter because my probe wires are broken. And sometimes I want to measure voltage and current at the same time.

My DT-830D is really accurate for the 20 volt range. I tested it in the lab of my university. All digits correct.

DT-830A RM15.00@darson. Voltage & current measurement is quite accurate but resistance has tolerance of 4-5 ohm.

this is non-post count thread mar should be ok to bump! just wanna keep it alive lol


cheapest? If you dont mind to get those yellow type imitation...its around 15-30 dude

This post has been edited by chowsc: Jan 16 2006, 04:52 PM

That reminds me, i just got me a 179


Dead accurate, perfect for my work since my last multimeter exploded violently (I wasn't even mine ), plus besides being great for my usual work. It just owns when it comes to comp geekdom, comes with a thermocouple, easy grip probes and a non slip case. Knowing my carelessness, i think the investment was well worth it (Got it for 5 days and blew up the 1000V fuse )

nice item u got there will go to jln pasar next week to search for this model and see what it is priced at ^^ and going to get some new hobby kits too !

Truly worth it if you're hardcore. Anyways, got a book on electronics by hambley. Anyways, anybody here want to build amps, i'm interested in the SOHA and Gainclone amps and would appreciate it if a few of us would post on it's design and improvement.

That's one sweet Fluke

do u have any ebook for that ?

If you need advice on semiconductors I wouldn't mind providing them since I come from a semiconductor backgroud

Anything from the standard group IV semiconductor like silicon to III-V technology, just fire away

what chip to use for handling large amp motors? just asking.. lazy to googling around.. hehe

anyone using microchip's PIC??

I got my smart card reader working. Now playing with MyKad. Reverse-engineering, hehe.

Success: reading out the JPEG photo. It's slightly less than 4000 bytes, 150x200 pixels.

Cracking head on the thumbprint format. Found standards specifying 6 bytes per minutia. But what I found on my card looks like 4 bytes per minutia. The data that I'm looking at matches the description "500 bytes per print". The header at the beginning contains the string "R1L1".

OMG. I love this thread, since I am currently in my first year of E&E engineering.

currently got project (actually a year two project), where we have to create a circuit. my group will do the mosquito repeller (using ultrasonic). but we need to modify the circuit (in order to get good marks). still thinking about how to modify it. actully, none of my group members are good in modifying/designing circuit. neither do i. i bought breadboard etc to do some self-experimentation at home in future ( after i settle all the projects )

btw, did you guys know where can i get moon shaped LED and other wacky-wakcky shapes LED? been hunting for them a few weeks already.

anyone here know about tomy brand product ?? they are going to sell new type of control helicopter rite ? oni cost RM 80.... use infrared one... charge few min can fly 80 second haha its made by paper

hi, i also from semicon background and working in a semicon company now.


u mean driver? what motor u want to drive? got stepper, dc and ac. Mayb u can use Darlington pair BJT to increase the current.

yah, i'm been using it for my fyp. Great micon. I've been using different micon. PIC, Motorola, 8051, Atmel, Hitachi and Mitsubishi

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.

Oekh. thanks for the info. Currently, Im trying to make a robot, erm, just a simple one. Like a tank with an arm on it. But, my prob is, where can I get simple mechanicle componet, such as motor to move the arm. Tamiya motor cannot a, coz it spin too fast. I want to find electrical motor with a gear on it, so the output will be strong and steady..heh~

Any suggestion?

Ok,cool that give me time to gathered the needed componnents and stuff.Thnx Xenon.

juz solved the PIC programmer circuit problem

thxs to xenon for all the advices!!!

for those who wants to build their own PIC programmer, refer to page 4 for the link

and those who have questions, feel free to PM me

Erm, mecha, can u post ur PIC pic? want to find one lo...

yo mezerwi,

if you want to see how a PIC microcontroller looks like, i think you can goto microchip.com

they give out free samples too

Hehe got a noob question here.I wanted a steady 5V DC supply...so I dicided to use a LM7805 regultor.The problem is that the 7805 get to hot so quickly and the other thing I tried using the 9V batteries when I connected it to the 7805 input I get only around 2.3V at the output and the 9V batereis got around 8.41V.

This post has been edited by Wavelength: Feb 24 2006, 04:56 AM

make sure ur amperage is less than the lm rating. in the datasheet, it will say that at this amperage, need heatsink of certain watt.

the output u get might be from a wrong configuration? or the heat..u haf to try them out.

Wah, after surfing those website, I still cant be on the stream meh.

Still need advice here, well, Im really new to this kind stuff.

Perhaps there will be a person who can instruct me all the way..geez..

Erm, If I wanna grab a piece of PIC, how much would it be?

This post has been edited by mezerwi: Feb 24 2006, 11:06 PM

its easier to set ur budget first then only find which of those that are in your range perhaps ?

Cool thnx...I'll check them out

maybe your circuit draw too much current and make the voltage hot and the regulator become hot. how much current ur circuit draw?

i think u can get free sample from microchip

Free sample only for those who got their own email, (exmpl: mail@mezerwi..)


Erm, bout my budget, max is RM 250 la..

Hmm don't think my circuit draw to much current . I just wanna test that 7805 regulator...so I connected it to a 7 segement display.

Anyway have anyone tried to purchase any stuff online through the link which listed the online suppliers on the 1st post ?If have, how was the service
(delivery time and price)

Where can i find a mini hand driller in kuala lumpur?? And what is the price range ? i need it to drill holes on the pcb board......

any1 here know where can i get temperature sensor n pressure sensor? went to jalan pasar but cant find it...
i ned it for my project cansat..