Monday, September 4, 2017

Circuit Diagram Automatic Battery Charger using LM317 and LM555 IC

Robotronicdiagram. - This is circuit diagram of Automatic Battery Charger using LM317 and LM555 IC look like in Figure 1 below. The main component in this circuit diagram is LM317, LM555 and other components. 

In here we will show you also the component parts used and the simple description of this circuit diagram and the last we will give you link to read more about this circuit from original source. 

Circuit Diagram 

Component Part
  1. LM317 IC
  2. LM555 IC
  3. LM7812 IC
  4. LM358 IC
  5. Transformer
  6. Capacitors
  7. Resistors
  8. Diodes
  9. Transistors
  10. LEDs
  11. Zener Diode

Circuit diagram like in figure 1 above is Circuit Diagram Automatic Battery Charger using LM317 and LM555 IC. According Electronichub site describe that an Automatic Battery Charger Circuit for sealed lead acid batteries is mentioned in this project. It is a pulsed-charger type circuit which helps in increasing the life of batteries. The working of this circuit is explained below.

LM317 acts as voltage regulator and current controlling device. The 15V Zener diode is used to set the LM317 to supply 16.2V at output in the absence of load. When the 2N4401 is turned ON by the output of 555, the ADJ pin of the LM317 is grounded and its output voltage is 1.3V.

LM358 acts as a comparator and voltage follower. LM336 is used to supply a reference voltage of 2.5V to non-inverting terminal (Pin 3) of LM358. A voltage divider network is used to supply a portion of battery’s voltage to inverting terminal (Pin 2) of LM358.

When the charge in the battery reaches 14.5V, the input to inverting terminal of LM358 is slightly greater than 2.5V at Pin 3 set by LM336. This will make the output of 555 go high.

As a result Red LED glows and the transistor is turned on. This will ground the ADJ pin of LM317 and its output falls to 1.3V.

Please read more this article from original source about Circuit Diagram Automatic Battery Charger using LM317 and LM555 IC using link Here.

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