Monday, September 11, 2017

Circuit Schematic Battery Charger using SCR

Eltronicschool. - This is one of the application of SCR component to build battery chargerBatteries with different potentials like 6V and 9V can also be charged by choosing appropriate components.

Beside we will give you circuit schematic, component parts of this battery charger using SCR, we also will give you the description globally and the link to read more about this project from original source.

Circuit Schematic

Component Part
  1. Transformer
  2. Bridge Diode
  3. SCR TNYN612
  4. Diode
  5. Green LED
  6. Capacitors
  7. Resistor
  8. Variable resistor
  9. Zener diode
  10. Red LED
Description

Circuit schematic like in Figure 1 above is battery charger using basic component SCR. Accordingly Electronicshub site that published this article describe that The AC supply is converted to 15V DC with the help of transformer and bridge rectifier and the Green LED is turned on. The DC output is a pulsating DC as there is no filter after the rectifier.

This is important as SCR stops conducting only when the supply voltage is 0 or disconnected from supply and it is possible only with pulsating DC.

Initially, SCR1 starts conducting as it receives a Gate voltage via R2 and D5. When SCR1 is conducting, 15V DC will flow through the battery and the battery starts to charge. When the charge on the battery is almost full, it opposes the flow of current and the current starts to flow via R5.

This is filtered with C1 and when the potential reaches 6.8V, Zener ZD1 starts conducting and supplies enough Gate voltage to SCR2 to turn it on.

As a result, the current flows through SCR2 via R2 and SCR1 is turned off as both gate voltage and supply voltage are cut off. The Red LED is turned on indicating a full charge on the battery. For more information click HERE.


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