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Eggtimer Rocketry Eggtimer Classic Assembly Manual page 15

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Mount the Power Jumpers and/or Voltage Regulator
The RevD Eggtimer board has two power options: You can use a 3V-4V battery without the
voltage regulator (like the "classic" Eggtimer) or you can install the voltage regulator and use
any battery from 4.5V-30V. Either way, you will have to install one or two jumpers to select
your power option. Do NOT solder both sets of jumpers, or you will damage the Eggtimer
board!
3V-4V Option (No Regulator)
Locate the ONE set of pads marked "3V", and with a spare piece of resistor lead install a
jumper across those pads. You will probably need to hold it in place with some paper masking
tape before you solder. Turn the board over, solder the jumper in place, and trim the excess
leads.
4.5V-30V Option (With Regulator)
Hold the regulator so that the leads face upwards. GENTLY bend the center lead out 90°
towards the round side of the case, about 1/16" from the bottom of the case. Try not to bend
the leads too sharply, or you may break them. Then, bend the center lead UP about 1/16" from
the bend, so that it makes a "Z". See the picture below.

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