ir remote circuit

This is a simple schematic designed to control a lamp using a Sony TV remote control. The circuit employs a PWM signal connected to a photocoupler, which isolates the power section from the microcontroller. The power section features an innovative method for driving a halogen lamp, operating in DC without requiring zero-crossing detection of the AC mains. Although this solution is not highly efficient, it generates less noise compared to a triac-based approach. For the power supply, a Sony Ericsson mobile phone charger is utilized, complemented by an additional coil with 10 turns in the secondary winding. The teletext buttons on the remote control are designated for various functions: red is for dimming the light, green to turn it on, yellow to brighten the light, and blue to turn it off.

This circuit utilizes a microcontroller to interpret the PWM signal generated by the remote control. The photocoupler serves to provide electrical isolation between the low-voltage control circuit and the high-voltage power circuit, ensuring safety and preventing interference. The design eliminates the need for zero-crossing detection, which simplifies the circuit and reduces component count.

The halogen lamp is driven directly from the DC output, allowing for smoother operation. The reduced noise levels are particularly advantageous in applications where audio quality is critical, as traditional triac-based dimmers can introduce hum and interference.

The power supply, derived from a Sony Ericsson mobile phone charger, is modified by adding a secondary coil with 10 turns. This configuration allows for potential voltage stepping or regulation, ensuring that the microcontroller operates within its specified voltage range while providing adequate power to the lamp.

The use of teletext buttons from the remote control for dimming and switching functions enhances user convenience. Each button's function is clearly defined, allowing for intuitive operation without the need for additional hardware interfaces.

Overall, this schematic provides an efficient, user-friendly solution for lamp control, leveraging existing remote control technology while maintaining safety and performance standards.This is a simple schematic which can be assembled to control a lamp with a Sony TV remote control. Circuit uses a PWM signal connected to photocoupler which isolate the power part from microcontroller. Power part has very interesting solution on how halogen lamp is driven because works in DC and a Zero-crossing detection of the AC mains is not req

uired. This solution it is not very efficient but it is less noisy as a triac one. For power supply I have used a Sony Ericsson mobile phone charger with 10 turns additionally coil in secundary winding. The teletext buttons are used for control: red for reduce light, green for turn on, yellow for increase light and blue for turn off the light.

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