DIY Infrared Radar System
by P. Marian in DIY | ECE projects | Hobby |
Chris from PyroElectro.com has a great article about a do-it-yourself radar system build with PIC18F452. It’s a great hobby project although the schematic is very complicated. This project uses three main devices to create the personal radar system. The IR Range sensor gives output, the pic microcontroller processes it and then displays the output on the led array. The...
Long Range IR Transmitter
by D Mohankumar in 555 | Various |
This Long range Infrared transmitter can emit pulsed IR rays up to 10 meters. This IR transmitter is ideal to use in Infrared receivers using Phototransistor or Photodiode as IR sensor. The circuit is a simple Astable Multivibrator using IC NE555. Resistors R1, R2 and capacitor C1 fix the output frequency to 1 kHz. T1 is the Darlington high...
Crystal Controlled 38 kHz IR Transmitter
by D Mohankumar in Various |
This is a precision 38 kHz Infrared transmitter using MOS integrated circuit uPD 6121.It uses the NEC transmission format ideally suited for remote operation in TV, VCD Player etc. The NEC transmission format includes leader codes, custom codes (16 bits), and data codes (16 bits).The frequency of oscillation is determined by the Crystal. The IR LEDs connected to the...
Infrared Repeater System Circuit
by P. Marian in Various |
This infrared repeater system is used to extend the range of an infrared transmitter used at an audio or video equipment at 10 m. The original signal is captured by the infrared receiver (figure 1), amplified and delivered to the IR transmitter (figure 2) through a coaxial cable. Its is possible to control an audio system located in the...
Impulse Modulated Infrared Transmitter Circuit
by P. Marian in Audio |
This infrared transmitter can be used with this infrared receiver. This transmitter uses. The modulated signal is produced by comparison of an audio signal with a triangle signal of high frequency using a comparator IC. An appropriate triangle signal generator must have the offset equal with half of the 5V power supply voltage and the triangular signal size is...
High Power IR Infrared Transmitter
by D Mohankumar in Various |
This Infrared transmitter can activate IR based switching circuits from a distance of 10 meters or more. It is a high power IR transmitter driving two IR LEDs through a Darlington transistor BD 139 to increase range and directionality. IC CD 4047 is wired as an Astable multivibrator and its output pulses depend on the values of C1 and...
LM567 Infrared Transmitter Circuit
by Received by Email in Radio |
This infrared transmitter use PWM (pulse width modulation). The transmitter is equiped with LM567, tone decoder circuit. Audio signal ( at least 50mVvv ) is amplified with T1 and then it is used to modulate IC1. Infrared transmitter frequency is adjusted with P2 between 25 and 40KHz. IR transmitter circuit diagram LM567...
Basic Infrared Transmitter Circuit
by Received by Email in DIY |
This infrared tranmitter is intended for use with this infrared receiver. It works with 2 – 1.5V batteries or a 3V lithium battery. To give a compact infrared device assembly and still a good frequency stability, the circuit uses a oscillator with outpashing network. Current consumption depends on power supply and duration as S1 remains pressed. When Ub =...
Infrared Headphones Transmitter Circuit
by Received by Email in Audio |
The transmitter offers a optical link (infrared) for headphones. Three infrared leds (ir) are polirised by T1 current, P1 is used to adjust the current level . Current consumption of this headphones infrared transmitter is about 60mA at 9V. Maintain separated adapter ground and audio signal ground to prevent current reactions thru LED. The optical link is relative directional...