rajkot

Monday, September 20, 2010

LED TOURCH USING MAX 660

  1. This is a simple LED torch circuit based on IC MAX660 from MAXIM semiconductors.
  2. The MAX 660 is a CMOS type monolithic type voltage converter IC. 
  3. The IC can easily drive three extra bright white LEDs.The LEDs are connected in parallel to the output pin 8 of the IC.
  4. The circuit has good battery life. The switch S1 can be a push to ON switch.

    NOTES:-
    • Assemble the circuit on a general purpose PCB.
    • The IC must be mounted on a holder.
    • The circuit can be powered from two torch cells connected in series.
    • The capacitors C1 and C2 must be Tantalum type.
    • The diodes D1 to D3 must be of 1N4148.

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