BATTERY CHARGER CIRCUITS

Author: Fayaz Hassan  When the battery reaches the maximum charging voltage defined by the circuit, most battery chargers cease charging it. This 12V battery charger circuit charges the battery at a certain voltage, known as absorption voltage, and after the maximum charging voltage is reached, the charger switches to float voltage to keep the battery at that voltage. The kind of …

The Lеаd-асіd bаttеrу іѕ perhaps thе mоѕt wіdеlу uѕеd tуре оf  rесhаrgеаblе bаttеrу.Thіѕ is bесаuѕе оf іtѕ соѕt еffесtіvеnеѕѕ and іtѕ сарасіtу tо deliver vеrу hіgh currents аѕ іt hаѕ аn еxtrеmеlу lowinternal rеѕіѕtаnсе.Lеаd-асіd batteries should bе сhаrgеd uѕіng current lіmіtеd voltage regulator circuit,whereas Ni-cd bаttеrіеѕ ѕhоuld bе сhаrgеd аt constant сurrеnt. Here іѕ a circuit whісh саncharge a 6V,4.5AH …

Using this circuit, we can charge 4-volt lead acid battery with the current ranging from 2Ah to 10Ah using appropriate transformer or SMPS.With necessary modification, we can use this circuit to charge 6v,12v or 24v batteries too!The circuit published here is meant for charging a 4v, 4.5 or 5Ah lead acid battery.AC voltage from a 9v stepdown transformer is rectified …

The Mobile Phone Battery Charger down-converts 220-240V AC mains supply to 9V AC with the help of a transformer (X1). The transformer output is rectified by diodes (D1-D4) wired in a bridge configuration and the positive DC supply is directly connected to the charger’s output contact. Build this circuit and charge your mobile hassle free.Working:A LED (LED2) works as a …