RC SWITCH
 
 
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RC SWITCH
 

RC-switch is a programmable electronic switch directly operated from a radio control receiver's channel.
The trip point of the switch is user programmable simply by pressing the onboard button while the board is connected and operational from a receiver’s channel. You can alter this setting as many times you wish. Each time the new position is memorized until a new one is programmed.
There are two modes of operation:
a) On-Off mode
The switch operates like a normal ON-OFF switch. Whenever you move the joystick past the programmed position the relay’s contacts are bridged (ON) and stay like this for as long as the joystick remains past the programmed position. If you move the joystick beyond this position then the relay’s contacts open(OFF) and stay like this for as long as the joystick remains beyond the programmed position.
This is the most common mode to turn a light ON or OFF.

b) Toggle mode
Every time the switch is commanded to operate it toggles between ON or OFF state in sequence.(First time is ON second time OFF third time ON etc.)
You will notice that if you leave the joystick past the programmed trip point then the relay will toggle continuously (the rate is appx. 2 sec.).
In either of the two operational modes the yellow Led reflect the relay’s state (led ON = relay’s contacts bridged).

Change of operational mode and reversing the relay’s functional state is provided through the programming sequence.
To enter the programming sequence you must power the receiver, which control’s the Rc switch , with the on board button pressed. The sequence has three windows one followed by the other .
As soon as the yellow Led lights release the button and the Led will start to flash rapidly indicating programming initiation. The led flashes for about 6 seconds and this is the operational mode programming “window”. If the button is briefly pressed while the led flashes the alternate operational mode is been memorized and signaled by 3 distinct led flashes and then you proceed to the next programming window. If the button is not pressed (in case you don't want to alter the mode) the operational mode remains as it was before. In this case the led stays briefly off and starts rapid flashing again for another 6 seconds period which is the second programming “window” where you can reverse the incoming channel’s pulses again by pressing the button shortly just as before. The third 6 second programming “window” comes last and here the relay’s state can be inverted by pressing the button shortly just as before.
Each time you press the button you get a confirmation of three led flashes when you release it.
After the third programming window normal operation is resumed using the new settings.
In some cases you may have to reprogram the trip point after making programming alterations.
All settings are memorized until you program new ones.

The switch has its contacts brought out to the two white wires and has a current rating of 1.5 A max. for load voltage up to 30V DC.
The switch contacts are fully isolated from the receiver's battery supply through a relay . This means that you cannot provide any voltage from them but instead you can control an externally provided voltage through them.

Initially the operational mode is ON-OFF and no reverse either to the relay’s contact state or of the incoming channel pulses.
The trip-point of the switch can be set anywhere between 0,8 - 2,3 msec(initially set to 1,2msec) .
Weight is 18 gr.
Dimensions are 2,8 X 2,2 X 1,5 cm.
Suitable for 4,8V - 5,9V systems.
The board’s operating current with relay energized is 40mA( this is been drawn from the receiver’s battery).
The onboard button’s location is indicated in the picture.
Uses are numerous and some of them are operation of landing lights , siren , digital camera control , turning ON or OFF glow plug onboard battery etc.
The most obvious use is to use the Rc switch for powering the glow plug (from an onboard 1,2V battery) when the throttle is in the idle region minimizing engine failure(see example). Use a Y connection on the throttle channel to connect both RC switch and the throttle servo.

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