I would think an electric fence spends most of its time producing a voltage with nothing to shock.
Since this has a relay anyway, could it be made to operate only if a detectable leak to ground appears ?
Maybe a circuit could be made using the fence as a detector, then the relay could switch over to electrify the fence, if the fence sensed a leak to ground.
Then back again after a short period.
This would extend battery life considerably.

i think there are 2 sources of the line harmonics phobia. the first is from the audio "golden eardrum" society. anything except "pure AC" is unacceptable to power audiophile equipment. so somebody drums up this fear of the deleterious effects of line harmonics. then thy turn around and offer to sell you the latest (and obviously MOST expensive) AC line conditioner and "cryogenically de-stressed" power cords.

the second source is actually a legitimate concern is from the ham radio community. RF noise from power lines can be quite annoying if you are trying to grab a signal from the noise floor but all you can hear is BZZZZZZZZZZZZZZZZZZZZ.

I am agree , not all what is so call easy good solution. I use transistors and make my basic digital circuits , any logic AND, OR, NOT, NAND, NOR, I was made part by part. I am not graduate in electronics, not at all but know how something work is good, and cannot be too much knowledge. (actually I never hear that "someone have too much knowledge", it not possible)
I easy follow TTL and all other low integrate circuits. And I never think "this I do not need anymore".
I do not need PIC , all my construction are hardware not software and if I make error for me easy found what going wrong.

hi every body can you help any one to send the header files for keyboard interface using PIC 18F4620.. PRESENT I AM USING KBD.C of CCS but it was not working with my code. this my code***********
******************************
#include "C:\Program Files\PICC\Projects\KEYPAD\keyprt.h"
#include <KBD.C>

unsigned char k;

void main()
{

port_b_pullups(TRUE);
setup_adc_ports(NO_ANALOGS|VSS_VDD);
setup_adc(ADC_OFF|ADC_TAD_MUL_0);
setup_psp(PSP_DISABLED);
setup_spi(SPI_SS_DISABLED);
setup_wdt(WDT_OFF);
setup_timer_0(RTCC_INTERNAL);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_comparator(NC_NC_NC_NC);
setup_vref(FALSE);
kbd_init();
//Setup_Oscillator parameter not selected from Intr Oscillator Config tab

// TODO: USER CODE!!
output_c(0xff);

while (1)
{
k=kbd_getc();

k=k+48;
output_a(k);
delay_ms(100);
//lcd_putc("\f");
}

}
****************************
thank you very much

I added a forum to the Digital DIY site a couple of months ago, for some reason though the mySQL database was very sluggish and often timed out. I tried rectifying the issue with the host company, their response was that this is normal...

I recently purchased and hosted the digital-diy.com domain from a more reliable and reputable company, needless to say that the forum operates many times faster and yet to see a time out issue.

If you want to view the forum, then please feel free to do so http://www.digital-diy.com/micro/forum/index.php

can I ask for just a simple ac voltage regulator with a 220 and 110v output just for our project....

Cool I have got to publish more JPUGs.

I have 2 adaptor boards for the LCD111. The first is just a pitch adjuster. The second has 2 74HC595 SOICs. I just need to find the gumption to make them.

Another 28 pin pic is the 18F2585. It is a more expensive chips at $5 or $6 a pop but it has 48K Flash and 3338 bytes of ram.

Short on time, need to run.

Great! I like the way things are moving. Students are learning and keeping interest.

The PIC18F2321 seems like a great chip. I never heard of it untill now and looked up the info and wow. Im going to order some this coming Wednesday. Thanks for that lead. If i had the laser printer i would have been glad to make you some lcd converters.

At least its not a major setback. Its something minor. Also the 18F2321 is nice because you can use to teach I2C and SPI hardware. Then maybe the "bit banging" of the both this way they can get a idea on how to implement the software version on pics without it such as the 18F1320. Thats when the junebug comes back in hand.

Anyway keep updating here i like to here how its moving along. Great work and keep it up!

I kinda fall into the category you describe, i would readily use a pic in place of almost any digital circuit, although in most cases the pic way is cheaper and easier to debug. I do have quite a good grounding in digital electronics but im crap at analog electronics.

Even at a relativly high level of production, i would image that a pic solution would be cheaper than the multitude of digital logic gates required to offer the same level of functionality of even the most basic pic.

I remember opening up a dead flash drive once, and applying 9v. Kinda funny, everything started frying and smoking and the led exploded.

You need to use a method of finishing your "work" that is more popular here. For example, if you search for SSD card stuff on a PIC, you will get many results.

I read and like the info in How Do Transistors Work? I have always had trouble with solid state devices. It is a very good article.

SIR,
i want to construct rfid tag please help me ,please send me circuit diagrams&working process

Have you tried it yet?

Also please note it's more that freeware it's free and opensource software. I suppose this doesn't matter to most people, other than they can be sure there are no secret bugs calling home.

OO was recommended in the latest edition of MoneySense magazine, along with some other freeware that was reviewed to be as good or better than their commercial counterparts.

What if you on the first day show them walter, and say with some learning and teaching you can make your own? As for parts have like a 20$ lab fee so you dont break the bank buying stuff, that's what our HS ceramics class does (I did not take ceramics).

1 cup 225 ml
1 tablespoon (TBS) 15 ml

Increase the baking powder to 20 ml if you want the crust to rise a bit more.

I found that if you prebake the crust for 10 minutes it is fairly soft. When I increased the prebake from 10 to about 13 it was hard to cut and a bit hard to chew. Still good.

I've made once and I found it was difficult to make the crust. After baking the crust was hard I think I didn't control the ratio of the flour and the water well. Got to try this someday
BTW, what is TBS and how big is the cup you use for the flour?