{"product_id":"pololu-4-channel-rc-servo-multiplexer","title":"Pololu 4-Channel RC Servo Multiplexer","description":"\u003cp\u003eThis compact four-channel multiplexer of hobby radio control (RC) pulses allows for easy switching between two independent signal sources.\u003c\/p\u003e\n\u003cp\u003eAn auxiliary RC channel selects whether the output comes from the master or the slave source. The activation threshold and direction are configurable. This assembled version ships with 0.1″-pitch male headers pins soldered in, so it can be integrated into hobby RC systems without the need for additional soldering.\u003c\/p\u003e\n\u003cp\u003eThe Pololu 4-Channel RC Servo Multiplexer can be used with standard hobby radio control systems and servo controllers to allow easy switching of servo control between two independent sources using a separate auxiliary channel as the input selector. This makes it ideal for applications in which you have two possible control sources and want to be able to switch between them on the fly. For example, you could connect two RC receivers to the same set of servos or electronic speed controls (ESCs) and allow the master transmitter to decide whether the master or slave transmitter is in control, thereby setting up your own buddy-system training setup. Another possible application would involve multiplexing between an RC receiver and a servo controller, which would allow you to switch between autonomous and manual control of a set of servos.\u003c\/p\u003e\n\u003cp\u003eThe RC multiplexer measures the width of incoming RC pulses on the channel labeled \u003cstrong\u003eSEL\u003c\/strong\u003e and compares it to a user-configurable threshold (with ±64 μs of hysteresis) to decide whether the master (M1–M4) or slave (S1–S4) inputs to the mux should show up on the output channels (OUT1–OUT4). By default, the threshold is approximately 1700 μs and the slave inputs are only selected when the pulses on SEL are above this threshold. The multiplexer has a learning mode that allows you to change the threshold and activation direction. A yellow indicator LED provides feedback about the state of the RC mux.\u003c\/p\u003e\n\u003cp\u003eWhen the RC signal on the SEL channel is lost or invalid, the optional \u003cstrong\u003eFAILMODE\u003c\/strong\u003e jumper determines the output behavior. If the jumper is left off, the master inputs will be in control. If the jumper is connected, the output channels go low and stay low for as long as the signal on the SEL channel remains invalid. For many servos and ESCs, a constant low on the signal line will turn them off, which might be desirable if the control signals are known to be bad.\u003c\/p\u003e\n\u003cp\u003eThe multiplexer considers the RC signal on the SEL channel to be valid if it has a 10–330 Hz pulse rate and 0.5–2.5 ms pulse width. The other inputs (S1–S4 and M1–M4) are unrestricted.\u003c\/p\u003e\n\u003cp\u003eThe power supplied by the master RC device should be between 2.5 and 16 V, and it must be capable of supplying the current that the servos connected to the outputs draw. The power pins of the SEL, M1–M4, and OUT1–OUT4 channels are all connected to the same \u003cstrong\u003eVM\u003c\/strong\u003e rail, and the mux draws its power from those pins. The power pins of the S1–S4 inputs are connected to each other on the \u003cstrong\u003e\u003ca href=\"https:\/\/www.pololu.com\/docs\/0J60\"\u003eVS\u003c\/a\u003e\u003c\/strong\u003e rail but are not used by the board.\u003c\/p\u003e\n\u003cp\u003eMore information about using this product can be found in the \u003ca href=\"https:\/\/www.pololu.com\/docs\/0J60\" target=\"_blank\" data-mce-href=\"https:\/\/www.pololu.com\/docs\/0J60\"\u003euser’s guide\u003c\/a\u003e.\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eIncluded hardware\u003c\/h2\u003e\n\u003cp\u003eThis assembled version ships with the headers pins soldered in to every through-hole except the extra slave power connection pins. A shorting block is included for optional use with the FAILMODE jumper pins. The assembled version can be incorporated into an existing RC system without the need for any additional soldering. The header pin spacing is the same as on standard RC receivers, so the board works directly with standard hobby RC servos and servo cables.\u003c\/p\u003e\n\u003ch2\u003eUseful Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/files\/pololu-4-channel-rc-servo-multiplexer-schematic-diagram.pdf?v=1622041273\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ePololu 4-Channel RC Servo Multiplexer schematic diagram \u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/files\/rcm01b01-drill.dxf?v=1622041272\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eDrill guide for the 4-Channel RC Servo Multiplexer\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Pololu","offers":[{"title":"Default Title","offer_id":39352862441555,"sku":"POL-2806","price":8.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/products\/0J4841.1200.jpg?v=1622041579","url":"https:\/\/shop.pimoroni.com\/en-eu\/products\/pololu-4-channel-rc-servo-multiplexer","provider":"Pimoroni Ltd","version":"1.0","type":"link"}