Hi, I am kinda new to electronics. I was wondering if I could get help with the circuit on this page http://programmer-pic16f84.blogspot.com/

Where do the wires going into short bold lines connect to?

And what are "4k7" resistors?

william

 

That's an odd symbol for ground. The short bold lines are ground.

4700 ohm

 

Thanks, so the ground wires hook up to the serial GND right?

 

Yes. Pretty much always connect grounds together when connecting two pieces of electronics that need to talk to each other.

 

Ok, thanks. I was wondering if there was a serial port doubleras my serial port is already is use by my mouse.

 

Do you have a free printer port? Any machine that old will probably support a simple parallel type PIC programmer.
Here's a link to the NOPPP the granddaddy of ancient PIC programmers.
http://www.covingtoninnovations.com/noppp/

__________________
Bill
Smart Kits build Smart People
http://www.blueroomelectronics.com/

 

No!

That's a relatively 'modern' PIC programmer, NOPPP isn't an early one - the father of home PIC programmers was David Tait, and almost all designs are based on his original works. NOPPP came years later, and was a crude attempt to reduce programmers to their bare minimum (regardless of compatibility with different machines).

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

Eh? Just how old is your computer? I haven't seen a serial mouse in many years.

Any computer that old should have two serial ports anyway.

If you're not stuck on the "simple" PIC programmer, I highly recommend one of Blueroom Electronics programmer kits. The Inchworm+ (ICD2 clone) or the Junebug (PICKit2 clone) are both excellent.

I own one of each and they're both very nice products. Now I spend my time programming and prototyping instead of fiddling with a finicky programmer.

You can buy the Inchworm+ kit at DipMicro Electronics.

I don't know where to get a Junebug kit at present. Ask Bill at Blueroom, I guess.

Eventually (if they ever get the online-order web-site done) you'll be able to buy the Junebug and the rest of the Blueroom line at Creatron Parts.

 

Must have been the wooden block

Antique computers had wooden panels

__________________
Bill
Smart Kits build Smart People
http://www.blueroomelectronics.com/

 

I use a new mac, the software i want to use is for pc, so I am stuck with a 220mhz win98 machiene. The only pc mouse i have (that works with this computer) is serial. Theres only 1 serial port. Also, is there a more common substitute for the resistors in the schematic?

Oh, I do have an XP laptop i can use...

 

My condolences.

Umm... Those are pretty common resistors. What exactly do you mean?

You'd need to buy or build a USB programmer then, or use a USB-to-RS232 converter.

 

Or better yet a PS2 mouse

__________________
Bill
Smart Kits build Smart People
http://www.blueroomelectronics.com/

 

If you build that programmer then be aware that it uses LVP (low voltage programming) and so your fuse settings must have LVP enabled or you will not be able to reprogram your chips.

Do yourself a favour and buy a decent programmer. The Junebug seems like the obvious choice.

Mike.

 

A quote from the datasheet of the 16F877:
Other chips may be the same. I agree, a JuneBug or InchWorm or ICD clone is the way to go in the long run.

__________________
Inside every little problem, is a big problem trying to get out.

 

I didn't realise that you can't accidentally turn of LVP when using a LV programmer. Obvious once you think about it.

Mike.