Complete List of Components and Total Parts for Pic n’ Mix Project Series?

I think this is likely to be a fascinating and educational project however it would help if Mike (or anybody in the editorial office) could publish a complete list of the components required to complete the series. Having ordered and got the components listed in the first article it was irritating to discover a £0.61p mentioned in the second. I could lose the will to live if the 3rd article lists more components
 I would be interested in knowing how many parts there are to the series, unless that is an editorial secret.
This is the second time of attempting to post that question, hopefully this time it doesn't get moderated or fails the reCAPTCHA

Hi Dennis,

PIC n MIX isn't a structured constructional project in our traditional style, it's a worklab-based  tutorial series with a degree of exploration about it.  Part of the package, I guess, is the need for resourcefulness and there may be suggestions for  updates or changes in forthcoming parts in light of practical experience.  We hope the need for some adaptability doesn't detract from your enjoyment of his work.

The Captcha crash is unfortunate and has happened to me a couple of times, until it's fixed I'm copying my reply to the clipboard before submitting, just in case.

Alan W  / EPE

I also lost my comments the first time when replying on the other thread so you are not alone Alan 
Regards,
Mike.

Don't get me wrong, I think this will turn out to be a fascinating series. I had in fact after the first article found Microchips CE482 code example and modified it to work while waiting for the second article to be published. Slightly different approach to Mike's but so what, presumably that's what a "worklab-based" tutorial series is for. It will also be interesting to see how Mike handles the A2D at the frequency he has programmed the PIC, unless I'm reading the datasheet wrong.On a point of information my reading of the delivery information tab on the Farnell website is that only trade orders are free, otherwise its £3.95 or a minimum order of £20.  I prefer to use Farnell as I find it simpler to deal with UPS instead of UK Mail or DHL which other suppliers use.Looking forward to the 3rd MayDennis 

That's odd about Farnell Dennis, I dont have a trade account but get free delivery - I wonder if this is because I am dealing with Farnell Ireland, rather than UK. I'll bear that in mind in the future, especially with Maplin's demise, getting components quickly without excessive delivery costs must be difficult in the UK now.
The forth installment will add a graphics LCD display (assuming I can get it to work!) but this is an item to order on Ebay. As soon as I am happy that it will work, I will post the part number. The one I am using now costs about 5 pounds from China.Regards,Mike.

I thought I would update this thread with my experience to date. In my impatience and realising that an A2D would ultimately be required I knocked up an astable using a TLC555CP and created a new project replacing the fake 1kHz square way signal from CE482 with its output. I used timer 3 to trigger the A2D (using an ISR) at 10kHz as per original and then introduced the stored values to the FFT routine. The only problem I discovered, which may help anybody else setting up similar projects, is that the DSP library  (not dsp.h) must be attached. I eventually worked out how to do it by right clicking the project and opening its properties then clicking on the xc16-ld tab, selecting libraries under the "option categories" and typing "DSP" nto the box labelled libraries. Then save etc as per usual. According to the MPLABX manual there is another way of attaching the library but this worked for me.Mike, can you confirm please the orientation of the 10uF capacitor connecting the microphone output to pin 4 in Fig 3 of the June article and have you decided on the graphics display you mentionned earlier? I am guessing this will be an I2C linked display producing a display analogous to the frequency display trendy on 1980s hifi's And Alan, any idea when the source code for June is arriving, its now 12 days since the issue was available in the shops.Avidly waiting for July, due 7th June!Dennis

Hi Dennis, apologies for the delay in replying. I thought I had reply notification set up on this thread, I clearly haven't. The EPE admin pointed out your message (thanks Alan)
Yes, that's the correct polarization - positive towards the op-amp.The display I used is the TJCTM24024-SPI, available from ebay. This is an example of one:
https://www.ebay.co.uk/itm/New-2-4-SPI-TFT-LC...160092?hash=item46654b8a1c:g:viIAAOSw1BlZOmKM

I've ordered a larger 3.2" display, which *might* work too:
https://www.ebay.co.uk/itm/3-2-LCD-Touch-Scre...AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

you can wait until I report back whether it works before buying one. I'm waiting for mine to arrive from China.
Cheers,Mike.

By the way, I'll give out a teaser for the July issue - it works, and it works really well

Hi Mike,Thanks for the update. I actually purchased last year  2 of the 2.8" versions of the display to play with on an Arduino, prompted by the micromite garage parking project in June 2017 edition. Personally amongst all the languages I know Basic has never tempted me so apart from spotting the display and playing with it that never went any further.I am still confused with the orientation of that capacitor (op amps are a bit too analogue for me!) Measuring the voltages on my Picoscope I get the expected 1.54V as the output of the reference voltage, 2.4V (DC) at the output from the microphone and 1.5V (DC) at pin 4 (C2IN1-) so to my way of thinking the positive of the capacitor should be the opposite way round to your schematic. As a learning curve I would be interested in your thoughts.With the capacitor my way round  and feeding a 400Hz signal from my iPhone I get a nice 0.83 to 2.24V sine wave looking curve so it would appear to workCheersDennis

Interesting. I just followed the application note. They made a specific reference to the polarization of the capacitor being as shown.
I'm never happy with polarized capacitors in these configurations and normally just revert to a non polarized one. I'm not an analogue electronics expert.
Cheers,
Mike. 

Mike,Having read carefully page 15 of 23 of the TI datasheet where it specifies the orientation of the capacitor the author justifies the orientation relative to the op amp bias (Vcc/2 = 4.5V) and the microphone bias (2V). In your modified circuit you have set the op amp bias at 1.54V so with the microphone bias as per the original I think the capacitor should be the other way round. If you agree then its clearly too late to put a correction in tomorrows edition but it might be something to consider for the next issue.For my education what sort of non polarised capacitor do you usually use at 10uF?CheersDennis

Ah, well spotted Dennis, and that makes perfect sense. You are correct.For the 10uF capacitor, I use parts like this one available from farnell.http://ie.farnell.com/avx/08056c106kat2a/cap-mlcc-x7r-10uf-6-3v-0805/dp/1657936?st=10uf%20ceramic
The main benefit with ceramics from my perspective is that they have a lower leakage current (I do very low power battery powered devices, and when you have a large number of high value capacitors, the quiescent current saving can be significant. I'll see if I can get a comment put in the magazine.Thanks,Mike.