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Step 2Power Supply for the Dice
Both the designs shown in the previous step need a suitable power supply which can be derived out of a wall wart, a suitable rectifier, smoothening capacitor and an appropriate +5V regulator.
If the user desires portability of the dice, then the wall wart transformer should be replaced with a suitable battery, say a 9V battery.
Other options for the battery exist, for example, to be able to operate the dice from a single AA or AAA battery, a normal linear regulator will not work.
To derive +5V for the dice operation, a suitable boost type DC-DC converter must be used. Figure illustrates a +5V power supply suitable for the dice operation from a wall 9V battery and the other figure shows the schematic for a +5V power supply from a 1.5V AA or AAA type battery using a TPS61070 boost DC-DC converter.
If the user desires portability of the dice, then the wall wart transformer should be replaced with a suitable battery, say a 9V battery.
Other options for the battery exist, for example, to be able to operate the dice from a single AA or AAA battery, a normal linear regulator will not work.
To derive +5V for the dice operation, a suitable boost type DC-DC converter must be used. Figure illustrates a +5V power supply suitable for the dice operation from a wall 9V battery and the other figure shows the schematic for a +5V power supply from a 1.5V AA or AAA type battery using a TPS61070 boost DC-DC converter.
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Dec 25, 2008. 6:44 PMjoinaqd
says:
awesome job dude...i had a flashlight like that..u gotta shake it to charge the 36mAh battery which powers a white led..good job!!
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