Lemon Microbrick Reference Guide
Page 2 of 20
Introduction
The Lemon Microbrick is a small, lightweight, full range DSMP (DSMX™/DSM2™ compatible) five channel
receiver with two onboard rotary servos, 5A brushed speed controller, and optional 3-axis rate stabilization. It
weighs just under 7g and can run off a 1s or 2s LiPo. There are two JST-SH 1.00mm pitch connectors for external
servos and solder pads for the battery, brushed motor, and external brushless speed controller (ESC). It is well
suited to the under 250g range of outdoor foam models running on a 2s LiPo, as well as a wide range of indoor
“UMX” type planes that use the 1s, 150-220mAh size cells.
The Microbrick has five available flight channels in standard Spektrum order (1-4, 6), plus two internal control
channels:
Channel 1: Throttle: Onboard 5A brushed throttle and external signal for a brushless ESC
Channel 2: Aileron (or Right Aileron in dual servo aileron setups; optionally the onboard Rudder servo for 3
channels where Aileron stick is used for the Rudder)
Channel 3: Elevator onboard servo
Channel 4: Rudder onboard servo
Channel 5: On/Off control of stabilizer (internal to the receiver)
Channel 6: Aux1 (or Left Aileron in dual servo aileron setups)
Channel 8: Master gain control of stabilizer sensitivity (internal to the receiver)
Normally channel 5 is controlled by a two-position switch (A on a recent Spektrum transmitter) and channel 8 by
the rotary knob (or equivalent controls on OpenTX/ErSkyTX transmitters fitted with a DSM™ capable module).
Channels 2 and 6 servo outputs are available on two JST-SH 1.00mm 3 pin connectors. These are the same as the
ones used by the Spektrum™ linear servo brick receivers and the HobbyKing HK5320S and HK5330S series rotary
1s servos (not the standard HK5320 and HK5330 which have very similar but incompatible Molex Picoblade
1.25mm connectors).
Channel 1 controls the onboard 5A brushed speed controller and the motor is connected to two solder pads or a
1.27mm Nano socket depending on the model of Microbrick. An additional two solder pads are provided for
connecting the battery. Alternatively, if header pins are installed, a brushless speed controller can be connected
with a 3-wire servo lead.
Setup as a 3 channel Setup as a 5 channel
(Battery and Motor connections not shown. A version with 5 pin vertical 0.1” header pins shown.)
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