This is a design for simple LED torch circuit. This circuit is based on IC MAX660 from MAXIM semiconductors. The MAX 660 is a CMOS type monolithic type voltage converter IC. The IC can easily drive three extra bright white LEDs. This is the figure of the circuit.
The LEDs are connected in parallel to the output pin 8 of the IC. The circuit has good battery life. The switch S1 can be a push to ON switch. For operation, the IC must be mounted on a holder. The capacitors C1 and C2 must be Tantalum type. The diodes D1 to D3 must be of 1N4148. The circuit can be powered from two torch cells connected in series.
The LEDs are connected in parallel to the output pin 8 of the IC. The circuit has good battery life. The switch S1 can be a push to ON switch. For operation, the IC must be mounted on a holder. The capacitors C1 and C2 must be Tantalum type. The diodes D1 to D3 must be of 1N4148. The circuit can be powered from two torch cells connected in series.
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