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reaction timer system, help please....

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my project involves the design, construction, and programming of a reaction timer. A unit is to be designed which allows a user to measure the time he/she takes to react to a given stimulus e.g time taken to light an led by the pressing of a button.. The results will be displayed on lcd display, i will be using the msp430 microcontroller an was looking for some help with the external cct as its not my strong point, please..
 

Afif

New Member
Ineed a circuit for 12V battery charger,that when the battery is fully charged the chargeing should be stopped and the LED should blink to inform that the bettery is charged.
I will be greatful forever.
Thanks
 
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