transformerless power supply

[saisiddharth]

hi all!

this is siddharth, iam searching for transformerless powersupply i.e i need 12v dc output with 0.5A current rating, so if anybody know any idea and any circuit , plz send me,

thank you,

siddharth.

 

[john blue]

How much your input? Direct from AC?

 

[mvs sarma]

It is better to be away from non isolated power supplies as they are hazardous to human life.
if any one other than designer uses such, without knowledge , or designer himslef forgetting or being overconfident, it could be fatal

 

[malik_zohaib]

without transformer you can not get 500ma. maximum current range is less than 300ma.

 

[saisiddharth]

How much your input? Direct from AC?

hi! sir,

thank you for reply

I developed the gas sensor circuit with transformer power supply which is working perfectly,
but due to the weight and large size of the transformer i like to remove it, so i want to develop a transformer less circuit,

i am using 230V as input and i need sufficient voltage (5v),and current to my circuit

thank you
siddharth

---------- Post added at 09:11 AM ---------- Previous post was at 09:09 AM ----------

hi! sir,

thank you for your suggestion,
but i need to develop transformer less circuit for my circuit, if u have any circuits please reply me.

thank you,
siddharth

---------- Post added at 09:15 AM ---------- Previous post was at 09:11 AM ----------

hi! sir,

thank you for your reply,

actually i developed gas sensor circuit with transformer which is working perfectly,
but now i want to develop it with out transformer.

thank you ,
siddharth