Charger. - This is an electronic circuit schematic of Adjustable Gel Cell Battery Charger using LM317 for you that can charge any size gel cell battries from 300mA until 1.3 A. The main component used in this circuit schematic is LM317 IC.
In here we will give you global description about Adjustable Gel Cell Battery Charger using LM317 and then we will give you link to continue your reading from original source as external website.
In here we will give you global description about Adjustable Gel Cell Battery Charger using LM317 and then we will give you link to continue your reading from original source as external website.
Circuit Schematic
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| Figure 1. Circuit Schematic of Adjustable Gel Cell Battery Charger using LM317 (Source: Eleccircuit) |
Component Part
- IC1 = IC1 = LM317_1.5A Adjustable Positive Voltage Regulator
- C1,C2 = 0.1uF 50V_Ceramic capacitors
- R1 = 470 ohms _ 0.25W Resistor
- R2 = 2.2K _ 0.25W Resistor
- VR1 = 5K _ potentiometer
- R3 = 1 ohms 1 watts Resistor
Description
Circuit schematic like in Figure 1 above is Circuit Schematic Adjustable Gel Cell Battery Charger using LM317. Eleccircuits site describe that in the circuit above, We use the LM317 as 1.5A Adjustable Positive Voltage Regulator. It converts the input DC voltage into the stable voltage to charge the battery. Which we adjust the 5K potentiometer-VR1 for 13.4V output.
We set the output current by the current sensing resistor( R3) in the ground or ( – ) terminal. The R3 is a current limiting. You can choose it to set the charging current.
When the current flow through R3. This results in a voltage across the base and emitter of transistor-Q1. It is a forward-biased. Thus, Q1 conduct current to LED1 and adj of IC1.
We set the output current by the current sensing resistor( R3) in the ground or ( – ) terminal. The R3 is a current limiting. You can choose it to set the charging current.
- 300mA = 2.2 ohms, 1 watts
- 500mA = 1 ohms, 1 watts
- 1,300mA = 0.47 ohms, 1 watts
When the current flow through R3. This results in a voltage across the base and emitter of transistor-Q1. It is a forward-biased. Thus, Q1 conduct current to LED1 and adj of IC1.
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