PIC MICRO CONTROLLERS FROM EBAY - Page 1
Forum section: electronics / beginners

author: neko efecktz
author_rank: Regular Contributor
timestamp: July 29, 2016, 02:58:59 am
content: Gidday all.Just a quick question that will probably get a thousand answers.Has Anyone had a bad batch of PICs purchased on ebay?Bad as in not to speck or failing to live up to expectations.Where from to avoid.thankyou.bill

author: Galenbo
author_rank: Super Contributor
timestamp: July 29, 2016, 07:58:03 am
content: Quote from: neko efecktz on July 29, 2016, 02:58:59 amTill now I don't have experiences with Ebay PIC's, but I once had problems with a bad keyboard from Ebay.The CAPSLOCK was locked, now way to turn it off.

author: tszaboo
author_rank: Super Contributor
timestamp: July 29, 2016, 08:11:50 am
content: You can buy genuine micros from Microchip Direct with a paypal account, they ship anywhere AFAIK, and you dont need to be a company. Why would you ever buy it from ebay?

author: batteksystem
author_rank: Regular Contributor
timestamp: July 29, 2016, 09:59:01 am
content: I used to request everything I need from Microchip office (they used to offer free sample), I get free PIC18 and free PIC32 ......

author: JPortici
author_rank: Super Contributor
timestamp: July 29, 2016, 10:33:59 am
content: I don't know. those worth using are usually not found on ebay

author: kripton2035
author_rank: Super Contributor
timestamp: July 29, 2016, 10:49:51 am
content: I generally order some samples from one seller , then I test themif they are within specs, I order moreif you really need genuine chips, only microchip direct, or mouser or digikey will be safe.

author: neko efecktz
author_rank: Regular Contributor
timestamp: July 29, 2016, 03:01:38 pm
content: I'm back,Thankyou for your answers.One of the chips I'm after is PIC16F877A available locally in Australia for $12 from Jaycar (a local hobby shop, one of the only Electronics hobby shops around now.)$8.09 from RS Components and a better price from Farnells or Element 14 At $4.16ea.I was looking at an ad on ebay 5 pieces for $20.00http://www.ebay.com.au/itm/5-pcs-PIC16F877A-I-P-IC-DIP-40-PIN-NEW-16F877A-/140891845948?hash=item20cdcef53c:g:ApkAAOxymHRRw~9lProbably not worth the risk to save about $1.50 when buying 5 pieces.once againThankyou for your suggestions.

author: JPortici
author_rank: Super Contributor
timestamp: July 29, 2016, 05:03:35 pm
content: Nah i used to buy it for the ebay price many years agobut do you ABSOLUTELY need that one*? there are at least a few pin-to-pin compatible (maybe even code compatible but i wouldn't bet on that) that are with more everything and cost much less.* this is one not worth buying

author: rrinker
author_rank: Super Contributor
timestamp: July 29, 2016, 07:25:41 pm
content: Unfortunate that you are in Australia, I have a box full of 16F877's and variants that I got as free samples from Microchip, the model railroad interface gadget I WAS going to use used this chip until recently. I figured the one with more memory would work equally well, so I got those - 878's is it?, or so I have if backwards and the 877 is the bigger memory version of an 873 or something? I can look when I get home. Anyway, I certainly have no idea what I will do with over a dozen of a now obsolete PIC micro. Also no idea what it would cost to send a small tube of them down under. Probably cheap by slow boat, but it may take a month.

author: JPortici
author_rank: Super Contributor
timestamp: July 29, 2016, 09:00:06 pm
content: There is no 878 AFAIK. The 877 is the bigger memory/larger pinout of the familyThe 887 is listed as direct replacement. you can find if for 1.50 or so

author: JPortici
author_rank: Super Contributor
timestamp: July 29, 2016, 09:01:12 pm
content: This with the assumption that we are talking about the 877A

author: rrinker
author_rank: Super Contributor
timestamp: July 29, 2016, 11:24:49 pm
content: Can you tell I'm not a huge user of PIC micros, I don't know the numbers. However, I now am looking at my supply and I have the following:7x 16F873A-I/SP6x 16F876A-I/SP (those are the big memory 873's)6X 16LF873A-I/SPand a stray MAX233 in the same boxThe interface board uses a 16F873 and a MAX233, the I/O boards used the 16F873, I figured the 876 would work as well since other than extra memory it was the same.Dunno that I will ever end up using these now, so I am willing to share at least some of them.

author: neko efecktz
author_rank: Regular Contributor
timestamp: July 30, 2016, 11:45:53 am
content: Thanks guys.I have been out most of the day.I'm just a newbie and the only experience with pics is a couple I picked up in a box full of parts from a hobby shop that was closing downa few years ago along with a couple of 2 x 16 lcd displays.I built a project up on breadboard a month or so ago, to prove to myself I could do it and to prove the concept of my project.I needed at least 6 or 7 digital inputs for the project I am building, to get started and then I want to add analog inputs to monitor voltage and temperature via one of thosetemperature chips.thus the PIC16F877A. Probably could have got away with a 28 pin chip.I bought one from Jaycar at $12.95 and have designed and built a double sided pcb and it works well.I am going to make another one to use as a development board once I fit the one I have into the power supply it will be monitoring.I want a few more chips of various types to experiment and learn more.A bloke needs a hobby and i'm retiring in a couple of years.Anyway it's getting late and i have a video to watch before bed.Will check the blog in the morning.once againThank you for you input.Bill