UploadedSubmitted by: grimjordax Project Website: nutsandbots.blogspot.com
Battery Current Alert
The Battery Current Alert watches ripple currents induced by the rectifier in a VRLA or other lead acid systems to determine battery health.
It sets off an alarm if the ripple is too high or too low which could indicate a problem with the battery system of rising impedance if the current is dropping or bad filter capacitors in the rectifier if the current is rising.
It uses a picaxe 14M microprocessor, precision reference, precision rectifier (personal hybrid design using a ZXCT1041- see U1,C1,C2,R7-R9.)
The final design replaced the dip switch bank and led shown in the drawing with 2 toggle switches and a buzzer.