Battery backup supply

$30-250 USD

Terminado

Publicado

hace más de 10 años

$30-250 USD

Pagado a la entrega

I need a battery backup system for a system which run on 3 volts. Main supply 4.5 volts = 3 X AA , backup CR2032 = 3 volts non rechargeable The design shoud switch over when the main is down to 2.7 volts Do not use OR diodes - it does not work Do not use WEBench from TI. Does not let you to change , add parts and simulate. I need shematic and simulation project Prefer LT spice , or IsimPE from Intersil For simulation i need simulation file and comonents models or lib If you use TINA, not higher than 9.1 Design should use minumum components from Digikey or Mouser, common parts (not expensive hard to find). Total cost of the parts not bigger than 4-5 US dollars

Electrical Engineering

Electronics

ID del proyecto: 5380548

Información sobre el proyecto

4 propuestas

Proyecto remoto

Activo hace 10 años

¿Buscas ganar dinero?

Dirección de email

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:

@Bulba39

Hi, I have been working in R&D more than 15 years for international electronic design companies in NZ and Australia . I have designed and developed many 8/32 bit micro-controller based designs, analogue and digital circuits, schematics & PCB layout as well as high voltage and power electronics designs, RF ,WiFi and Bluetooth, capacitive touch interface, stepper motors, battery management etc. I have vast experience with low power and discrete transistor circuit design. Re your project I have drawn the circuit in Simetrix, could send you results, not sure if I could attached jpeg file at this stage. I do not have LTSpice but potentially could install it or you could redraw the circuit in LT to check functionality from jpeg. The switching happens ~ 2.85 V but sure it can be tweaked down to 2.7 with adjusting some resistors values. The BOM cost around 1USD plus 5-6 resistors.

$55,50 USD en 3 días

4,9

(15 comentarios)

5,6

4 freelancers están ofertando un promedio de $127 USD por este trabajo

@krhickssc

Your project seems like an excellent one for me to work with. I shall give this project review and see what designs I can develop for you within your guidelines. I have experience with power source designs and look forward to providing you a great product. Please contact me if you have any questions or need more information. Thank you.

$222 USD en 3 días

0,0

(0 comentarios)

0,0

@khodifadpankaj

Hi, I am hardware design engineer working in multinational company. I am having experience of deigning 150mW to 72W power design. I can help you to design battery backup supply. Fill free to discuss for any quarry. Regards, Pankaj

$166 USD en 3 días