Lemon Microbrick Reference Guide
Page 20 of 20
BUT some cautions:
1. The onboard brushed speed controller must be limited to 5A regardless of the supply voltage.
2. Any servos connected to the two white JST-SH Aileron/Aux1 connectors must be capable of operating on
the full supply voltage.
In practice there are three likely scenarios:
1. Supply is a 1s LiPo cell (typically 70-300mAh capacity) and that is the maximum voltage in the system.
Typically, the motor is a 1s geared brushed motor running direct from the two brushed connectors on
the Microbrick. All components will see a maximum of 4.2v. External 1.7/1.9g servos of the 5320/5330
type and linear servos intended for 1s AR6400 type bricks work fine.
2. Supply is from an external brushless speed controller. Typically, the motor is a 2s version, and the 2s LiPo
speed controller supplies the Microbrick with 5v from its BEC. In this case the External 1.7/1.9g servos of
the 5320/5330 type are just outside their 4.8V maximum rating but many people use them on 5v without
an issue. You cannot use linear 1s servos on 5v, however.
3. Supply is direct from a 2s LiPo to the Microbrick. This might typically be used on a DLG or a plane with a
2s brushed motor. In this case any external servos, if used, must be 8.4V capable. The onboard
Microbrick servos are fine on 2s.
MB Ref Guide v1.0.1g
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