Dinesh Wick Posted September 5, 2016 Report Share Posted September 5, 2016 Hello Everyone, I am trying to build a mobile phone charger (For my Samsung phone) by myself using following components. Step down transformer (from 230V to 9V 1200mA) Bridge Rectifier 1000uf capacitor (To smooth the DC voltage) 7805 Regulator (To get output voltage 5V) A micro USB cable I got from a broken charger. Appreciate if you can share your thoughts regarding this. Will this harmful to the phone or will this work better than the low quality Chinese chargers? Quote Link to comment Share on other sites More sharing options...
audioguru Posted September 6, 2016 Report Share Posted September 6, 2016 The datasheet for a u7805 voltage regulator says its minimum input voltage is 7V. The 9VAC transformer has a peak voltage of 12.7V and the bridge rectifier reduces it to 10.9VDC so it will be fine when filtered by the 1000uF capacitor. It will not harm a phone because the phone has the charging circuit inside it. Quote Link to comment Share on other sites More sharing options...
login
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.