Bargain: Radioshack DMM 2200812-1 for $9.95 - Page 1
Forum section: electronics / testgear

author: rsjsouza
author_rank: Super Contributor
timestamp: April 13, 2015, 09:47:20 pm
content: I just saw this on their website:http://www.radioshack.com/radioshack-46-range-digital-multimeter-w-pc-interface/2200039.html#q=multimeter&start=10I have no idea how good it is, but for 10 bucks it is a steal. The sad part is they only have local stock somewhere in the country (unfortunately nowhere near me in Dallas, TX)

author: bills
author_rank: Frequent Contributor
timestamp: April 14, 2015, 02:08:57 am
content: For low voltage seems to be a good meter,I just sold one for $35.00. nos.After opening it up I would not go any where near mains voltage with it, crappy fuses poor pc design.It did come with a usb cable,temp probe and software, I did not try to use it have too many other good meters.For $ 10.00 why not.

author: bills
author_rank: Frequent Contributor
timestamp: April 14, 2015, 02:26:13 am
content: Several stores in my area have these in stock,if you want one and are willing to pay shipping. pm me.

author: jobog
author_rank: Regular Contributor
timestamp: April 14, 2015, 02:28:58 am
content: Not a bad meter for $10.00 but make sure all the functions work. Got one when our local RS was closing and 2 of the functions didn't work. They replaced it and this second one works well. Maybe they are selling them that cheap because they had problems.

author: IanB
author_rank: Super Contributor
timestamp: April 14, 2015, 04:20:58 am
content: It's quite an OK meter, I have written about it here:https://www.eevblog.com/forum/reviews/a-look-at-the-rs-22-812-meter/I particularly like the open PC interface and the relatively fast and noise free logging at about 4-5 samples per second (this was with the original RS-232 model, I don't know if the USB variant is similarly accessible). I have written my own capture software that allows me to connect several meters to a PC and record from all of them simultaneously into the same log file.

author: rsjsouza
author_rank: Super Contributor
timestamp: April 21, 2015, 03:24:49 am
content: I got one of these DMMs from an eBay seller that probably snatched the whole lot ($19.99 + free shipping). It is quite a remarkable meter for the price.IanB, thanks for the link to your review; the USB version probably has the same protocol as it is a simple PL2303 device. However, I can't seem to find documentation about it - do you have a link or a PDF?

author: IanB
author_rank: Super Contributor
timestamp: April 21, 2015, 03:49:34 am
content: Quote from: rsjsouza on April 21, 2015, 03:24:49 amHere's a download link:http://support.radioshack.com/support_meters/doc68/68424.pdfAs far as hardware is concerned, you need to raise DTR at the PC end and then the meter sends a continuous stream of samples until you lower it again.You can find my complete data logging application here. It will compile for Windows with any free edition of Visual Studio. If you want the executable to be portable make sure to configure static linking of the libraries or it won't run on another machine without the necessary DLLs present:http://www.candlepowerforums.com/vb/showthread.php?261833-Playing-with-the-RadioShack-22-812-Meter&p=3326583&viewfull=1#post3326583This code is Windows only I'm afraid. It's not portable to Linux without a major re-write. Sorry about that.

author: rsjsouza
author_rank: Super Contributor
timestamp: April 21, 2015, 10:35:29 am
content: IanB, awesome! Thanks a bunch.Despite my avatar I am not a Linux-only guy, especially when most of the electronics-related software is for Windows anyways...