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The bottom of the board has jumpers that can be bridged with solder in order connect VCC to VRC or VCC to LOAD
HIGH. These jumpers provide extra flexibility in how the system is powered, and some examples are given in Section
3.2.
Load interface
The LOAD LOW and LOAD HIGH pins are connections for your load and load supply. The LOAD LOW pins are
normally disconnected from GND, but when the switch activates the MOSFET turns on and connects LOAD LOW
to GND. There is a flyback (also known as a “freewheeling”) diode between LOAD LOW and LOAD HIGH. The
board’s MOSFET can deliver up to 3 A with VCC at 5 V and can handle load supply voltages up to 30 V. More details
on connecting your load and load supply to the switch can be found in Section 3.2.
Outputs and indicator LED
The RC switch provides feedback about what state it is in via a yellow indicator LED. The LED behavior is described
in Section 8. Status information is also provided by two additional outputs:
• The GOOD pin indicates the presence of a valid RC signal (10–330 Hz pulse rate, 0.5–2.5 ms pulse width).
• The OUT pin indicates whether the MOSFET is on.
When these outputs are high they will be at the same voltage level as VCC. When low, these outputs will be at 0 V
(ground). These outputs do not have resistors in series with them. Each output can source or sink up to 25 mA.
Configuration interface
The learning mode jumper on both the top and bottom of the board can be used to get the device into learning mode
and configure it. The configuration procedure is described in Section 9.
Pololu RC Switch with Small Low-Side MOSFET,
bottom view with dimensions.
Included hardware
A 12-pin 0.1″ straight breakaway male header [https://www.pololu.com/product/965] is included with the Pololu RC
Switch with Small Low-Side MOSFET. The header pins can be soldered in and used to connect the RC switch to
perfboards or breadboards [https://www.pololu.com/category/28/solderless-breadboards].
Pololu RC Switch User’s Guide © 2001–2015 Pololu Corporation
3. RC Switch with Small Low-Side MOSFET Page 9 of 35