Circuit Design Electronics Step up converter, Voltage tripler,boost, driver pcb for simple lcd flasher
$30-250 USD
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PLEASE REPLY TO THIS PROJECT OFFER WITH YOUR PREFERRED COMPONENT AND WHY -- 555? MC34063? Diodes and caps?
Circuit design electronics electronic engineering electrical engineering
Step up converter, Voltage tripler,boost, driver pcb for simple lcd flasher
Here is an example circuit :
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Can you design a circuit which is lower cost?
We need :
(1) BOM showing suggested components and prices from Digikey or Mouser in the USA
(2) Schematic
(3) Gerbers, etc.
(4) Hand made prototype. You will get the electronic components locally.
(4) Simple video of the final hand made prototype functioning, showing voltage, current consumption, etc with an ohmeter or oscillascope or similar. Video shot from your mobile phone and sent to us via Freelancer.
(5) We can have a company make the finished prototypes for us and ship them to us in the USA.
This simple circuit board drives a simple liquid crystal display, which consists of one pixel only. The pixel flashes on and off 3 times per second approximately.
LCDs typically consume less than 3 microamps when functioning.
Our LCD is unique, as it consumes 12V to 18V (like the old dye based lcds in cars in the 1980s and old fighter jet display avionics.)
Low cost is our primary concern. Low power consumption is our primary concern. I really think a pcb running constantly at 200mA is way too much power consumption, so I hope you can suggest an better design.
Note that we do not want to use expensive components like Maxim Switched Capacitor Voltage Doubler : [login to view URL]
Note that multiplexing an lcd is a good idea, as 1/2 duty and 1/3 duty reduces the power consumption. However, our primary goal is a low cost pcb, and multiplexing may be too costly for parts.
Today I like low cost button cell batteries, coin cell batteries, like the CR2032. If necessary, we could use (3) 3V CR2032 to multiply the voltage to 15V or 18V.
Here are some good app notes to read. Nothing new in them however, so not worth reading :)
[login to view URL] 555 timer
[login to view URL] Wikipedia
[login to view URL] Freescale
[login to view URL] estimator
Thank you for reading! Allen.
项目ID: #8330377
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有18名威客正在参与此工作的竞标,均价$298/小时
hi sir i am an expert electrical engineer i can do it for you i have almost 7 years of experience in this field i can do it for you please consider me for your job I assure you quality work and ontime delivery reg 更多
Hi. I am a professional Electronics Engineer having expertise in PCB designing as well as in Circuit designing and their simulations. Contact me and have a discussion to finalize the project.
SOLACE Engineers Inc. is an engineering solutions' company working in various fields of engineering, with an aim to provide solace to people through our skills and expertise. We are new here but we have performed m 更多
I have a experiemce in building a buck boost dc-dc voltage converter. So this can be useful in helping you find the best solution with my technical expertise
Hi Allen, We are already developing a LED string DC/DC SEPIC converter (which is both step-up and step-down at the same time) for defence industry. Our proposal is based on the use of a cheap switch converter to s 更多
In pur we have got members with experience of 13 years in designing power supplies & PCB. This rich experience help us to deliver the expected design on time with quality .