Find Jobs
Hire Freelancers

Automatic & Manual MP3 Player Triggering Circuit

$10-30 USD

Terminado
Publicado hace casi 8 años

$10-30 USD

Pagado a la entrega
I need a circuit design to trigger two MP3 players. Each player has 8 trigger pins. When a pin is momentarily shorted to ground (low) the player plays the MP3 file associated with that pin. One section of the circuit will automatically play MP3 files 1 through 8 on PLAYER "A" spaced by an adjustable INTERVAL TIMER. The other section of the circuit will play MP3 files 1 through 8 on PLAYER "B" by manually pushing buttons. Each time an MP3 file is played I need a MASTER RELAY to hold energized for 30 seconds. All of my MP3 files will be 30 seconds in length. I need the circuit design to use simple, basic and common I.C. chips. No micro- controllers that require programming.
ID del proyecto: 10227190

Información sobre el proyecto

6 propuestas
Proyecto remoto
Activo hace 8 años

¿Buscas ganar dinero?

Beneficios de presentar ofertas en Freelancer

Fija tu plazo y presupuesto
Cobra por tu trabajo
Describe tu propuesta
Es gratis registrarse y presentar ofertas en los trabajos
Adjudicado a:
Avatar del usuario
ne555, decoder, binary counter, logic gates and transistors. I'm doing it for 25 just to get some stars in my profile
$25 USD en 2 días
5,0 (4 comentarios)
2,8
2,8
6 freelancers están ofertando un promedio de $82 USD por este trabajo
Avatar del usuario
I have over 35 years experience as an electronic design engineer, please see my profile for more details I believe I could easily design this for you based on the simple 555 timer IC. However the timing tolerance will not be very accurate using this method. In actual fact a micro controller device would be very accurate, very simple circuit and a cheaper solution. However the bid is for the 555 timer solution as you requested The deliveables would be a circuit as a pdf and a BOM as an excel spread sheet fully costed using distrubuters part numbers Best Regards Dave Lelievre
$222 USD en 3 días
5,0 (8 comentarios)
4,9
4,9
Avatar del usuario
I am a Professional Engineer, I have strong expertise in it I have seen the requirements and understood it Please open chat window and discuss further, so to start and complete the project.
$150 USD en 5 días
5,0 (5 comentarios)
4,1
4,1
Avatar del usuario
Wow brother, I can do your project as you want on separate chips. It's too easy for me to do so. I'll even take care of whatever chips were not many. But whether this is convenient for you to gather a large scheme. This will probably be more than 6 chips. But if we take the microcontroller it will be 1 chip and I can do so do not need any additional strapping, like quartz and capacitors.
$35 USD en 10 días
0,0 (0 comentarios)
0,0
0,0
Avatar del usuario
This is not a complex design. That is the reason why I chose it as my first project Freelancer. Dicrete analogue and logic chips fit very well for this circuit.
$35 USD en 4 días
0,0 (0 comentarios)
0,0
0,0

Sobre este cliente

Bandera de UNITED STATES
McAlester, United States
5,0
11
Forma de pago verificada
Miembro desde ago 4, 2008

Verificación del cliente

¡Gracias! Te hemos enviado un enlace para reclamar tu crédito gratuito.
Algo salió mal al enviar tu correo electrónico. Por favor, intenta de nuevo.
Usuarios registrados Total de empleos publicados
Freelancer ® is a registered Trademark of Freelancer Technology Pty Limited (ACN 142 189 759)
Copyright © 2024 Freelancer Technology Pty Limited (ACN 142 189 759)
Cargando visualización previa
Permiso concedido para Geolocalización.
Tu sesión de acceso ha expirado y has sido desconectado. Por favor, inica sesión nuevamente.