In Progress

Electronic measurement and detection design help needed

We need some EE design assistance with a very small project. There are two small sub-circuit functions we have to implement in an existing product.

Both sub circuits will provide an input to a TI MSP430 microcontroller running at 3.3V. SMT components will be used.

Circuit 1: Line voltage measurement. 0-300 VAC input isolated with the output going into an A/D converter in the MPS430. 1500VAC isolation and noise filtering required. Accuracy and linearity especially at 240VAC required. Prefer a design with passive components only. No ICs

Circuit 2: Water presence detector. When an external sensor (small PCB with traces as the probe) gets wet, the circuits output raises an MPS430 input pin from low to high. 12VDC is available. Prefer a design with passive components and simple transistors only. No ICs

Schematic and BOM are the deliverables

Skills: Electrical Engineering, Electronics, Microcontroller

See more: water design, ti design, presence assistance, detection design, design water product, design pcb need, design help, circuits design, small microcontroller, schematic design, need help pcb, need design help, msp430, microcontroller design, microcontroller circuit design, measurement, ICS, electronics pcb microcontroller, electronic PCB, electronic circuits, electronic circuit design, design pcb, design circuit, converter design, schematic pcb converter

About the Employer:
( 14 reviews ) Roswell, United States

Project ID: #4168329

Awarded to:

ExpressElectro

This is basic task, I offer you professional help!

$95 USD in 3 days
(4 Reviews)
3.2

10 freelancers are bidding on average $168 for this job

MikroStar

i, i can help. i have experiecne with isolation circuits for the microcontollers .

$180 USD in 5 days
(37 Reviews)
6.0
quang102

dear sir i can do that thanks

$250 USD in 7 days
(14 Reviews)
5.1
MIKY4227

hi i can help you , see portfolio for samples of works

$250 USD in 7 days
(15 Reviews)
4.9
betaenergy

Dear Sir, We are Reserach and Development company whose working area are : -Digital Motor Control -Analog Design -Electronic Design -Power Electronics -PCB design -Embedded system -Matlab -Simulation of ha More

$220 USD in 5 days
(13 Reviews)
4.7
SanducAndrei

Hi, do you need a professional help?

$150 USD in 5 days
(9 Reviews)
3.3
creonsolutions

hey, electronic engineering undergraduate is here to help u.

$150 USD in 20 days
(2 Reviews)
1.8
noumanpkk

i can do it in just an hour.

$100 USD in 7 days
(0 Reviews)
0.0
luckyking2013

I am a new here ,hope to give me a chance,thank you

$150 USD in 5 days
(0 Reviews)
0.0
javierbarriga

Hi, I can collaborate

$250 USD in 7 days
(0 Reviews)
0.0
parmarjp

I can help you with this project.

$100 USD in 10 days
(0 Reviews)
0.0