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 Home » Power » Ni-Cd charger
Ni-Cd charger    

This is a NiCd/Ni-MH charger that can charge with constant current and automatic charge termination when the total voltage for all cells reach the setting voltage. 

I design this project to charge for 4 cells Ni-Cd/Ni-MH only .After assembly all components into PCB then adjust VR1 to get the voltage at pin 5 of LM555 is 5.8-5.9V or about 1.45 V/cell (1.45 x 4 = 5.8V) 

This circuit charging the battery at about 270 mAh or 10% of C (my battery is sanyo Ni-MH 2700mAh) .You can change the charge current by replace R2. 
The charge termination when the voltage at pin 6 of LM555(total cells voltage) reach to the voltage of pin 5 of LM555 and the relay1 turn off so no power consumption when charging complete becuase it open the main AC power supply. This project like a general night chager in the market beause it take a long time to complete charging.

Battery Chargers for NiMH, NICD, Li-ion, li-polymer Batteries 

All PCB are pdf format included posistive, negative bottom and overlay

Category: Power | Views: 1655 |


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