If someone could told you, using an isolation transformer saying 120V/120V it helps, since the probability of touching both ends with your empty hand is with 50% smaller compared with touching the phase when your foot or your other hand is on the ground. there is no electrician/electronics guy on this world which doesn't experimented electrocution. On Sat, Sep 19, 2015 at 7:38 AM, Justin Richards wrote: > I think i have mentioned before but my first brush with electrocution was > playing with a string of 20 xmas lights when very young. Marked as 14v on > the bulb with a 240v supply. Thought i could jamb bits of wire in the > socket to bring out the contacts and got badly zapped. I was shocked that= i > got it sooo wrong > Perhaps they are a bit young but a good lesson when driving home ohms law > is to have 3 globes in series and ask what would you expect the volt drop > across each globe to be. 6v batt with 2v globes works well. > Then ask them to remove the centre globe and ask what the expected voltag= e > would at the contacts where the middle globe was. > Basically, I learnt this lesson when young ... removing one 14v xmas ligh= t > left 240v potential across the contacts. > When asking techs at work about the 3 globe puzzle I got many varied > responses. > I think this is a good lesson as it drives home the whole voltage drop > current flow thing and can be easily demonstrated. > I was also recently surprised how expensive those little globes are. > On 19/09/2015 2:04 AM, "Denny Esterline" wrote: > > > So, I have opportunity to reach about two dozen cub scouts about 6-9 > years > > old. I'm looking to start them with very basic electricity (battery, > bulb, > > wire) and move them on to some more advanced stuff. > > > > There's a vague thought in the back of my mind about documenting the > > process and turning it into something publishable (blog post, hardcover > > book or something in between, TBD) > > > > So, I'm soliciting suggestions for two things, projects and sources. > > > > I'm thinking start with a pair of penlight cells and an incandescent > bulb. > > I do think as a beginning a bulb is better than an LED for a few reason= s, > > but moving to LEDs should follow fairly quickly. > > > > Trouble is, I was immediately stymied by the cost of incandescent bulbs= .. > > Over $5 US each at the local hardware store had me running for the door= .. > > Even Ebay seems to be around $1/bulb. (I plan to explore Christmas bulb= s > > this weekend) So, clearly, sourcing things for what is essentially a > throw > > away can be quite painful. > > > > > > So.. Thoughts? > > > > -Denny > > -- > > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > > View/change your membership options at > > http://mailman.mit.edu/mailman/listinfo/piclist > > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .