pic compiling/programming questions

[Nigel Goodwin]

So the ir receiver (tsop or temic, they are the same...) demodulates a high to low( because its active low i think?) when there is a 38 khz continuous signal right? and a 0 when there is no signal? And what are the cycles / bursts??

The IC output is normally HIGH, when it receives a burst of 38KHz it goes LOW, however there are certain restrictions in the ratio of LOW to HIGH, and how long it can stay LOW for - too long, and the AGC inside the device turns the gain down.

However, your purpose is really identical to a remote control, so you should have no problems at all.

 

[breadboardguy]

Okay so 10 cycles per bursts mean that the 38 khz must go high to low more then 10 times and then putting a x delay time? So to send a 101 i must do :
ON FOR X TIME TO ANNOUNCE THE DATA TRANSMISSING/38 khz on 10 cycles/ 38 khz off / 38 khz on for 10 cycles/ On for xtime to tell the end of the transmisson
Each signal would be spaced by 15 or its equivalent for the "on for x time" cycles evrytime.

Is it that ?

Please telll me.

 

[Nigel Goodwin]

It depends entirely on the coding system you decide to use, my tutorials use the Sony SIRC's system as it's simple and easy to decode.

 

[breadboardguy]

Does anybody know a great place to buy pic? From mouser they are 4 dollar each and on microchip, 1.5 $... It has to ship
to canada.

And does the 16f628a can be reprogrammed once or multiple times?

 

[blueroomelectronics]

Creatron Inc or dipmicro are both Canadian. Also RobotShop.ca is based in Montreal.

 

[breadboardguy]

None of them have ir sensors and pic together, i will have to go mouser...

But i need to know if i have to buy a lot or not( Can they be reprogrammed or they are only usable once?).

 

[3v0]

If you are going to order PICs from the US check Newark. They are much less expensive. May have the other stuff you need.

 

[breadboardguy]

7 weeks for chipping! mouser is not an option

 

[blueroomelectronics]

My junebug kit includes an IR detector. How close are you to Robotshop?

 

[breadboardguy]

Where is it located?

Is a flash memory pic reprogramable ???

 

[blueroomelectronics]

RobotShop.ca
Look for contact info. They are in Montreal.

 

[breadboardguy]

They are at 33 km, but they dont have ir receiver module.

Can someone tell me if the pic 16f628a is reprogramable???

 

[skyhawk]

Yes! Check the data sheet.

https://www.electro-tech-online.com/custompdfs/2009/05/40044F.pdf

Flash endurance is 100,000 writes.

 

[breadboardguy]

Thank you all for your help, i now have all the answers that i needed and i am already in the process of programming.

You wont see me for a while until i have new questions...But i will try to answer them on my own.

 

[blueroomelectronics]

They are at 33 km, but they dont have ir receiver module.

Can someone tell me if the pic 16f628a is reprogramable???

1 my Junebug includes an IR receiver.

2 yes all the Flash PICs are reprogrammable.

 

[breadboardguy]

I need 10 infrared receiver, so i dont think that i will buy 10 junebug kits.

 

[Sceadwian]

Umm, not that I don't blueroom to sell plenty of units, but isn't buying 10 programmers more than just a little overkill? The Junebug kits are 50 dollars. A PIC which you can program and stand alone IR modules will cost you less than 10 dollars.

 

[breadboardguy]

This is why i go newark (canada one) 20 $ for 5 16f628a i/p, 5 tsal 6200 and 10 tsop receivers .

 

[blueroomelectronics]

Yes. The PICkit2 and compatibles work great with MPLAB.

 

[breadboardguy]

There is something i dont get, on this page, they say the pickit2 programs 8/14/20 pins and a guy on a forum said that he succesfully programmed the 16f628a,wich is 18 pins ???

**broken link removed**

EDIT:

Never mind for the pickit2, i would need a 2nd programmer to make it work.


How do i get an .asm file to send in mpasm? i need mplab sim?

Does anyone knows about the pic programming thing,some people just build a very simple circuit to program one type exclusively of pic ( ex: 16f628a) but where can we get information of where to connect the pic pins? assuming that i use serial port of printer an ic-prog/winpic800 . On ic-prog website they claim there freeware can program almost all the pics, but they dont give a programmer for all.