Bruce Posted August 21, 2006 Report Posted August 21, 2006 i like to try this project that i think about if its possible...transformerless powersupply ..-input 220volt-using any prefered IC -1.5 min output voltage-60 max output voltage-adjustable ampere..or what modification can you do just to have a transformerless n high output voltage.. thank.. Quote
Guest nanop Posted August 21, 2006 Report Posted August 21, 2006 Lets see,There probaly won't be any that would have all the features that u listed. Just search " Transformerless Power Supply " on google and it would have many good projects. I also don't know of any that uses ICs. The first is probaly the best. here's the lick :http://www.aaroncake.net/circuits/supply5.htmBTW, How come u don't want to use a transformer? power converting is the main use of a transformer. If no one uses a transformer for power supply, then what's the point of having it? Quote
Bruce Posted August 21, 2006 Author Report Posted August 21, 2006 thank you...just thinking and experimenting my ideas coz transformer are heavy and consume space and heat too... hehehehe...is it possible for the diagram you show will produce 50volt about and about the current? Quote
audioguru Posted August 21, 2006 Report Posted August 21, 2006 The transformerless circuit supplies a whopping 15mA and is a severe shock hazzard. Quote
Guest nanop Posted August 22, 2006 Report Posted August 22, 2006 Here's another one:http://www.geocities.com/tjacodesign/supply/supply.htmlThe max is still 12DC/ 15mAbut, it also gives formulas to change the voltage or current by using different component values.The maximum DC current which can be supplied by this circuit depends on the value of capacitor C1: Imax,out = pi× C × f × Vmains [A]The RMS mains current is mainly capacitive and almost independent from the DC load of the power supply: Imains = 2 × pi× C × f × Vmains [A]The power consumption is set by the mains current and the zener diode voltage of D1Note: Without load, almost all power will be absorbed by zener diode D1! P = Quote
SatthisCy Posted September 18, 2006 Report Posted September 18, 2006 Bruce,Just an advise.....High voltages such an 220 and 110 volts are DANGEROUS!!Transformers povide isolation from the mains power so,my opinion is that you must always use transformers when dealing with high voltages... Thanks. Quote
ante Posted September 18, 2006 Report Posted September 18, 2006 I agree; using this kind of non galvanic isolated device is suicidal! :o Quote
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