I made that pickit2 clone thta mensioed in this link http://simon.derr.free.fr/site/spip/spip.php?article11

software dettect this programer succesfully ,but when i connect device it can’t able to dettect the divice PIC , some times it could able to dettect but it always showing PIC16F886 dettected actualy i was put PIC16F676 and 30F2010.
some times error is coming [" Vpp is ready ...like that ]. i had check the Vpp but its only 5v pulses .how much it should be? and MCLR feed back volt is 1.8v.

My problem is the left side of the monitor seems to be going bad. Can’t figure that one out quite yet.

But thanks for your writeup.
Mark

the serial board is not displaying right value, even at constant distance, the variation in value is very high. I can’t maintain a constant value pls what could be wrong?

You could add a delay after the display statement while debugging.

Yes, the RC values I gave should also work for 40kHz sensors, but you definitely need to change the code to generate the pulses at 40kHz instead of 20kHz.

Also, I noticed you used 24khz transducer but your resonance circuit gives a reading of over 80khz. can’t I use, the circuit since it is likewise above 40. Or what value of frequency do I.need to achieve the desired resonance

Lastely sir, I used 100 micro farad decoupling capacitor at the output the receiver. This is because the 1 micro I your circuit wasnt giving any output. can I.have your view and suggestion any this sir.

Thanks for your comment. Regarding the RC filter values, you can use the equation f=1/(2*pi*R*C) to calculate. The display unit is meter. Whether or not a transmitter/receiver can be interchanged depends on the manufacture of the sensors. In general, they are interchangeable.

also. my serial com is displaying too fast. i know i need to add a dela. but i dont know where to add the delay. so it wont affect the frequency of the arfuino output to the transducer.

can the transmitter be used for the receiver and vice versa??? and why is the output on the serial board displaying 0.02 value. what unit is your program measuring wit. Cm or M… thanks so much. and any one aside kwong who knows should pls help out. am a final year student. and my project has really been giving me hard time. i will also luv to make a friend who i can chat wit. and he can put me through every step.