satellite-dish command decoder

Rating: 0.00/10 (76Votes cast)

Category: Digital Circuits / Decoder Circuits
Views: 3326
Rank: 0

Decoding this bit stream into ASCII hex values is an ideal job for a low-cost 8-bit microcontroller. Using a microcontroller with onboard flash memory, such as the NEC Electronics µPD78F9418A (www.necelam.com), eliminates the need for external memory. The only external components are a few discrete devices for the signal detector and the coaxial-cable loop-through (Figure 2).One of the µPD78F9418A microcontroller`s 10-bit A/D converters performs pulse detection and acts as a simple timing device. Using a reference voltage of 5V, the converter provides approximately 4.88 mV per step. An A/D-converter conversion value g visit page.

One of the µPD78F9418A microcontroller`s 10-bit A/D converters performs pulse detection and acts as a simple timing device. Using a reference voltage of 5V, the converter provides approximately 4.88 mV per step. An A/D-converter conversion value g http://www.edn.com/article/CA382782.html

Related circuits

tone decoder

For some applications it is important to have a tone decoder with narrow bandwidth and fast response time. This can be accomplished by the dual time constant tone decoder circuit shown. The circuit has two low-pass loop filter capacitors, C2 and C'2. With no input signal present, the output at...

Second-audio-program-adapter

The baseband-audio input comes from the pole of switch Sl in the stereo decoder, and is coupled to IC1 (a CA3089) via a 78.6 kHz bandpass filter that consists of capacitors Cl and C2, and inductor Ll. IC1 is a combination i-f amplifier and quadrature detector normally used for FM radio systems...

TDM stereo decoder

The circuit shown here with RC filter (Figure T). Micropoco capacitor has a temperature coefficient of 125 10"6 60.10" 6'C" V In simplified circuits a fixed resistor (e g. 620k) can be used for a guaranteed switching level of < l6mV.

Digital Encoder with PIC16F57

This encoder can transmit the state of up to 16 TTL digital inputs using an RF or infrared transmitter. When enabled, the included modulator automatically generates the 38kHz IR carrier. Containing a PIC microcontroller, the circuit is very flexible. You can decide which transmitter inputs will...

Encoder-decoder

The transducer circuit can be operated as either a tone encoder or decoder by changing the position of Sl. The operating frequency of that dual-purpose circuit is determined by C3 and R2. Capacitors Cl and C2 are not critical and can be of almost any value between 1 and 5 mf. When the...

Pulse-Width Modulator

This circuit allows the effective power in a load to be controlled by varying the duty cycle of the on/off ratio of l

SCA decoder

The circuit uses a Signetics NE565 PLL (Phase-Locked Loop) as a detector to recover the SCA signal. The input to the SCA decoder circuit is connected to an FM receiver at a point between the FM discriminator and the de-emphasis filter network. The PLL, IC1, is tuned to 67 kHz by R7, a 5...

Stereo Decoder Circuit

No description available.

Dish Position Control By Stepper Motor/Geared Motor and IR Remote