Single-channel remote control

Posted on Apr 25, 2012

In this project we'll see how to build a single-channel remote control. It 's a project easy to do : by using a radio module pre-assembled, we will get a card compact without sacrificing performance major. The insert function allows Nutchip impossible to obtain with a remote commercial: here are some suggestions from our readers. timer function : with a remote button, the relay remains energized for a time. mixed-function : two buttons switch on and off the relay, the third on for a short time, the fourth for a long time. delay function : By pressing the button on the remote, the LED lights now, but the relay is activated only after some time.

Single-channel remote control
Click here to download the full size of the above Circuit.

The schematic includes a few components. In addition to Nutchip (IC1) trovialmo rel? a transistor with its pilot (TR1), an LED (DL1), and the radio receiver module (RX1). The ?-RESET pin connected to an external RC delay network driven by a dedicated integrated (IC3), a Motorola MC34064. With this integrated there will be no problems even in case of blackouts or brownouts, when the available voltage on the power supply might be insufficient to bring values ??to the proper functioning of Nutchip, if your application is not critical, or if you can guarantee continuous availability of 5V, then you can omit IC3. The other terminals of the board need to give the 5 Volt power supply stabilized (M1) and the output relay contacts (M2). On M2 are both normally closed (NC) and one normally open (NO) relay, which basically functions as a switch. The relay is energized by activating the output OUT4 Nutchip. The transistor TR1 amplifies the current output of the relay moves to the required (up to 50 mA). The guilty must be with a 5 Volt coil and the output contact must have a voltage and current proportional to the load to drive. For example, to light a bulb, 220V and 100W will be adjusted with a relay coil and contacts from 5Vdc to 250Vac 5A. The handling of household usually needs to add an external contactor or Servorelay great power. For this scheme we have designed a single sided PCB, which you can achieve ein house following...

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