# 2-channel Remote Control Without IC[Good for Helicopters!]

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## Introduction: 2-channel Remote Control Without IC[Good for Helicopters!]

This Instructable will show you how to make a 2-channel remote control which you can use for your remote control helicopters!
For a multi channel remote control, you can use a CD4017 both in the transmitter and the receiver circuits.
You will need:
2 555 timer ICs
2 10uf Capacitors
2 10k resistors
3 1k resistors
2 10nf capacitors
5 BC547 transistors
2 1N4148 diodes
some wires
A breadboard(it is good to first prototype it)

## Step 1: Clock Circuit

This part uses:
555 timer IC
10uf Capacitor
10nf capacitor
10k resistor
1k resistor

The frequency of the circuit will be 11.99 Hz. If you want to increase the frequency, reduce the resistance and capacitance and you will be done

This circuit's diagram is not by me. It is from :
http://freespace.virgin.net/matt.waite/resource/handy/pinouts/555/
It will also have a calculator to calculate the frequency of the circuit.

Also you will need to build one more for the receiver.

## Step 2: NOT Gate

Here i am going to show how to build the NOT gate.
This is the one which will be connected to the clock.

## Step 3: The Remaining Circuit (transmitter)

the clock there is the output pin(3) of the clock circuit
input1 and input2 are the inputs you want to give signal inputs to.
and the right end is the output wire. That's the wire where we are going to transmit the signal. connect it to any oscillator or an ir led.

Do as shown in this schematic. Now you can try connecting an SCR from the clock to the first transistor for synchronization. That works-- of course!

I hope y'all will be happy with your new circuit!

Don't worry, it surely works!

I will post the proof video soon[i find it hard to upload my video because it is big]

Thank you for reading this instructable!

## Recommendations

• ### 3D CAM and CNC Class

700 Enrolled

## 35 Discussions

can I use this circuit for rc plane

Well, the circuit above is only a modulator. You must make the transmitter circuit separately, or a simple IR LED could be connected to the circuit. In the latter case, the range will be upto 10 metres.

Good day can you help me how to connect your circuit in my automatic light curtain controlled. Do you have any contact information?

sir can you help me make a transmitter and reciever that can rotate a dc motor forward and reverse and also stop?

Yes! I will be extending the instructable to describe in detail various applications of the remote control, and there you can find it.

Does it only transmit the on signal to the receiver, or is it possible too to transmit the off signal to the receiver ?

2 replies

The question has a trivial answer, or it is not clear

When the transmitter transmits positive voltage or lights up an IR LED, it is considered an 'on' signal. Otherwise, it is considered an 'off' signal

I am new to circuits. Could you please explain how the synchronization part of it works?

I wanna control 2-serbo motor using the ckt. Please could you tell me what would be the modification and how to extend the range?

2 replies

The clock is required to separate the signals, as two signals are transmitted through one carrier.

Tx - transmitter

I was wondering? :

1. What's the use of i/p 1 and i/p 2? Does it change frequency?

2. What signal goes to input of the Tx? Is it a voltage source with a on/off switch?

3.Do I need SCR for both Tx and Rx?

4. In the Tx circuit, the first transistor from left, where is the emitter?

5. What kind of circuit will I connect at the output of the Tx circuit? Where do I connect the antenna?

6. What kind of circuit will I connect at the input of the Rx circuit? Where do I connect the antenna?

7. Is there a formula to know how much frequency is being emitted by reducing/increasing the capacitor and resistor?

1. input1 and input2 are for inputting the voltage signal, which is between 0 to 5 Volts. It doesn't change the frequency, but it changes the amplitude of the output-the signal

2. They are inputs for the voltage(i/p 1, i/p 2). You may connect a potentiometer to it or directly control it.

3. SCR is needed only for Rx

4. The emitter is towards the diode.

5. Connect an IR LED to the output.

6.connect an IR receiver(small black thing found inside any STB) to it. I am not sure about the pins of IR thing because there are many versions of it. google the part number and check it out.

7. Check www.555-timer-circuits.com for the formulas

the advantage of increasing the frequency is that the responses will be faster and more accurate.

It is because one bit of information is transmitted only in one clock cycle. and frequency is number of clock cycles per unit of time. That means, if you increase the frequency, more information will be transmitted in a unit of time.

when i insert not gate,in either transmitter or reciever: circuit does not works. can you please tell me what to do.

(i am grounding all pins to same termial, is it something to do with it?)