Advanced Tester Design: Dual Integrated Receivers for Infrared Signals
A remarkable breakthrough in tester technology, this device incorporates two integrated remote control receivers meticulously designed to enhance functionality. These receivers, when triggered, illuminate an LED, serving as a clear indicator of successful reception of an appropriate infrared signal. To ensure compatibility with a wide array of existing infrared remote controls, the device employs two distinct receivers: the TSOP1736, optimized for carriers operating at 36 kHz, and the TSOP1738, tailored to carriers operating at 38 kHz. This dual-receiver configuration guarantees comprehensive coverage of all prevalent infrared remote control systems.
Innovative Infrared Signal Tester: Dual Receiver Configuration
This cutting-edge tester incorporates two integrated remote control receivers, each designed to activate an LED upon detecting a compatible infrared signal. To ensure compatibility with a broad spectrum of existing infrared remote controls, one receiver, the TSOP1736, is finely tuned for carriers operating at 36 kHz, while the other, the TSOP1738, is optimized for carriers at 38 kHz.
Efficient LED Indicators: Clear Visual Feedback
In this design, two LEDs provide essential visual cues. The first LED, D3, indicates the presence of power. These LEDs emit a brilliant white light with a minimum output of 20,000 mcd at 20 mA, ensuring visibility even at a reduced current of 5 mA, which aligns with the maximum output current of the receiver ICs. The author utilized 5 mm LEDs in the prototype, boasting an impressive typical output of 55,000 mcd at 20 mA.
Stable Operation and Power Efficiency
A Zener diode plays a crucial role by regulating the supply voltage for the receiver ICs, maintaining it around 4.3 V. Remarkably, these ICs exhibit reliable performance even at voltages as low as 3.2 V. The circuit is powered by a 9 V PP3-style (IEC: 6LR22) battery, ensuring sustained functionality until the battery voltage drops to approximately 7 V.
Versatile TSOP1738: Widely Compatible Infrared Receiver
The TSOP1738 stands as the standard in the IR remote control receiver series, supporting all major transmission codes. Its applications extend beyond remote control systems, finding utility in proximity detection setups, robotics, and security systems when paired with an IR-led. This versatile sensor adeptly captures IR signals operating at a frequency of 38 kHz.
- The minimum and maximum input voltages are -0.3 and 5V, respectively. Typically, +5V is used.
- Can detect IR signals from Remotes (38kHz)
- Operating current: 5mA
- High range and wide coverage area.
- Will respond only to IR signals due to high immunity against ambient light
- Low power consumption
- Has an in-built preamplifier
- TTL and CMOS compatible
Note: Complete technical details can be found in the TSOP1738 datasheet given at the end of this page.
- Supply Voltage: 5 V
- Power consumption: 0.4 to 1.0 mA
- Min. Ee irradiation: 0.35 mW/m2 typ.
- The angle of detection: 90
- Dimensions of the casing (mm): 12.5 x 10 x Thickness 5.8
- Temperature range: -25 C to +85 C