eletronic stimulation device

Hello fellow builders, I am having some trouble, for a rather important school project i need to perform some test and for one of the set of tests i need a device to deliver electric impulses on a person on regular basis. so i immediatly thought of medical devices like a TENS or EMS (if i remember correctly) unit. no the big problem is they are almost unobtainable in working conditions or they cost a fortune in shipping and stuff. is it possible to make a unit like this on my own ? 

Posted by sacredrose 5 years ago

Something to do with an oldcd player

Hi everybody! Okay , Let's talk I have 5 old cd players here that I can break , open , use the parts and etc. and I want to know if there's a cool thing to do with these eletronics they are working , and there's no use for them, so could someone show me any cool ideia to do with them ? I tried to do a amplifier to my cellphone to listen to music here,but it didn't work as well I wanted Sorry if the topic is at the wrong place , and I have already took a look at the site, and didn't find some nice ideia :o

Posted by mcamargo 4 years ago

wiring and charging 2 3s1p lipo batteries in series?

If i wire three 3s1p lipo battery packs in series, does it become a 6s2p battery and can I charger the 2\three batteries in that form(series). This is for a electronic long board battery. I would be using three zippy compact 5000mah 3s1p 11.1volt batteries.  Im want the total mah to be 5000 and output voltage to be 33.3. therefore the wirng like this would work but im not sure if i can charge it in series with 1 charger or if i have to charge them all seperatly if wired in series.  Thanks!

Posted by bluebox17 1 year ago

heating elements for sale

I have two electric heating elements I would like to sell. they are good enough for melting metal and fireing pottery, they will also come with the control eletronics too. you can make gingerys "little Bertha" if you want. I pulled them out of a huge eletric furnes for heating a building, they are good but you would need to figure out the controls. they are quite long. there are two coils per stack, so you would get 4 coils. the first picture is with a 12 ruler to show the length ( it reads 10.5 inches)all I want is $30 and $25 for shipping..... the cost is hard to beat!just send me a comment if you want them!

Posted by Danielro10 9 years ago

Arduino - Where and how to start?

Hello! I'm pretty new here, been browsing the site and looking at so many instructables I'd like to build but at least 1/5th of them use Arduinos. I've googled around, browsed some online eletronic shops, ebay and I've noticed there are many models of them, so my question is quite simple - which Arduino would be good for me as a starter? (Honestly I'd like to go with the cheapest as my budget is not big and I'm afraid I could damage it somehow which would not be nice) I'm familiar with C and C++ so I guess that helps me a little in programming the thing, now the only problem is that I've got nothing to program :) Thanks, Matiss.

Posted by friiks 7 years ago