2W switch power supply circuit

It is to compensate the reduction of output power due to low voltage supply the transistor uses the Bridge-Tied-Load principle (BTL) which can provide an output of around 1.5 to 2 W at 14Vdc with a power supply of 6 V.

For the circuit the potentiometer can be used to control the voltage. Capacitor C1 and C2 are meant for filtering the supply voltage if a battery eliminator is used as supply source. For operations using a battery C1 and C2 are no necessary.

The work of the power supply is the gain of 2N3053 2N3906 and 2N3904 is fixed internally at 2Watts.
It is to compensate the reduction of output power due to low voltage supply the transistor uses the Bridge-Tied-Load principle (BTL) which can provide an output of around 1.5 to 2 W at 14Vdc with a power supply of 6 V.

For the circuit the potentiometer can be used to control the voltage. Capacitor C1 and C2 are meant for filtering the supply voltage if a battery eliminator is used as supply source. For operations using a battery C1 and C2 are no necessary.

Figure 1 gives a stripboard layout for the 6V regulated power supply shown in figure 1.
The layout does not include the transformer block, so the input to the board needs to be 6V AC from a suitable transformer. 
The layout includes space for two optional 2-way screw terminal blocks to make connecting up the power supply easier.

If the input voltage is 6V AC, you will be able to draw 1A from the power supply.  For the maximum input voltage of 14V you will be able to draw 2W.

Video Activated Relay circuit

If you want  the tuner you need to build the tuner by yourself ? 
The relay contactor output was connecting to electronic circuit by under control.

What is that mean? Can You directly connect the relay to a socket ? and the TV can straight away plug in to the socket? 

For the electronic circuit diagram which is only DC voltage , but i think the tv need AC , Yes?

So,do you need to put a transfomer ? where should you put ? how to decided which kind of transformer to be used?

I think normally is 12Volt or 9Volt transformer? Yes.

Electronic Part List

1. R1, R2   10K 1/4 W Resistor 
2. R3   1K 1/4 W Resistor 
3. R4   33K 1/4 W Resistor 
3. C1  1uF Electrolytic Capacitor 
4. Q1, Q2, Q3   2N2222 NPN Transistor 2N3904 NPN Transistor
5. D1, D2, D3   1N4148 Diode 
6. K1   9V Relay 
7. J1   RCA Jack 

Remark:
1. For you  will be take the circuit to switch for control mains voltage, it should be enclosed in a case.

2. This electronic circuit may be also work with most line level audio, however you may have to change the resistance value of R1 .