- Blog entry posted in 'Projects', June 11, 2013.
I figured this would be ''good'' project to share to others, and hear opinions, yes i know its not the prettiest thing on earth, but it works as intended.....it is: well, can you guess it? it should be pretty easy?
well maybe i just say it straight, no need for making quiz of such thing, its just two lamps, e14 and e27 size, in paraller, with series to 230v live. The idea behind this is, that the output can be well shorted, lamp just lights up brightly!. Good for testing old equipment, and stuff ater repair, in case of possible SC/bad caps. I dont have variac/isolation transformer construction yet, so this'll do.
well, there are couple BIG major ''faults'' in this. E27 will happily accept any finger/other stuff, so there is sure risk of electrocution. other, if this is used on big-wattage equipment, lamp will still light up, due to large current draw.
But, opinions, discussions, roses/spikes all welcome!
Gasboss775, November 10, 2015
I have seen this sort of thing used to good effect by power amplifier builders, to limit current draw when first testing a newly built project. Sometimes the simplest things are the most effective. It might also be a good idea to have a selection of different lamps and have switches to select one suitable for your load. Also the bayonet style lampholders would be better for safety concerns that you mentioned.
Gasboss775, November 10, 2015
This one has a built in switch, so would save you having to buy switches: [URL]http://www.mr-resistor.co.uk/item.aspx?v=1&i=10158&gclid=Cj0KEQiAyIayBRDo4vjdqJrgxZ0BEiQAhOYCYGdmmfeLpLnv3zcdYWTWwtFhV7dvrJGpDDy4R4eVLAwaApeo8P8HAQ[/URL]
fezder, November 10, 2015
Oh yes, amplfiers and other things that take large inrush current, like computer psu's and even motorized stuff like angle grinder, there are many good situations where to use it, but there is always the downside that DUT won't take full power. Variac would be another option, but thing is, some psu's won't take any current at lower voltage then BAM, and if there is fault, well.... Also, this bulb-thing allows looking for suspicious places that get too hot without sending bits flying in shop so to say
