Color TV standby energy saver II

The color TV standby energy saver introduced in this example can reduce the waiting power consumption to 0.5-1W when the TV is in standby mode, and the energy saving effect is remarkable.
Circuit Operation Principle The color TV standby energy saver circuit consists of a power supply circuit, an infrared receiving control circuit and a current detection control circuit, as shown in Figure 3-165.

The power circuit is composed of a power transformer T, a rectifier bridge stack UR, a filter capacitor C5-C7, and a three-terminal voltage regulator integrated circuit lC2.
The infrared receiving control circuit is composed of an infrared receiving head lC3, a double D flip-flop integrated circuit I, and a resistor R5-R7, capacitors C2 and C3, a diode VD1 and a light emitting diode VL.
The current detection control circuit is composed of resistors Rl-R4, R8-R10, capacitors C1, C4, diodes VD2-VD5, transistor V, relay K, optical retort VLC, Schmitt inverter integrated circuit ICl and IC4b .
When the standby button of the TV remote control is pressed, the TV is in a standby state. At this time, since the load current flowing through R10 is reduced (ie, the voltage drop of R10 is reduced), the conduction capability of the internal light-emitting diode and the phototransistor of the TVP is weakened, so that the 4 pin of the IC1 outputs a high level, and the 1C4b is reset by C4. The 1 pin of IC4 changes from high level to low level, V is cut off, K is released, and the working power of the TV is cut off. At this time, the 13 pin of IC4 is low level, the 12 pin output is high level, and VL is lit.
When the remote control standby button is pressed again, IC3 converts the infrared light emitted by the remote controller into an electrical signal and applies it to pin 11 of IC4, so that the monostable trigger composed of IC4a and peripheral components is flipped, and IC4's 13-pin and 1 The foot outputs a high level, V is turned on, K is pulled in, and the TV is powered on.
Component selection
R1, R2 and R4-Rg all use 1/4W metal film resistors; R3 uses variable resistors; RlO uses 2W metal film resistors.
Cl, C2, C6 and C7 are all selected from aluminum electrolytic capacitors with a withstand voltage of l6V; C3-C5 are all monolithic capacitors.
Both VDl and VD2 use 1N4148 silicon switching diodes; VD3-VD5 selects 1N4007 silicon rectifier diodes.
VL selects high brightness LED of φ3mm.
UR selects the rectifier bridge stack of lA and 5OV.
V selects C805O or BC547B, 3DG8050 reef NPN transistor.
ICl selects TCAlO5B type Schmidt inverter integrated circuit; IC2 selects 78L05 type three-terminal voltage regulator integrated circuit; IC3 selects SFH5O5A type infrared receiving head; IC4 selects CD4013 type double D flip-flop integrated circuit.
VLC selects the NYl7 or 4N25 type optocoupler.
K selects 4098 type 9V DC relay.
T selects 0.5-lW, secondary voltage 9V power transformer.