generate a biphasic current with a low frequency and a low voltage

generate a biphasic current with a low frequency and a low voltage

hi,

i want to create circuit similar to an old circuit, but with some modifications, so that i can set the output frequency and the output voltage

here are the details of the old circuit :

old schematic : [login to view URL]

notes about the old schematic : [login to view URL]

simulation video of the old circuit : [login to view URL]

step 1 : frequency generator, biphasic, fixed voltage (9V), fixed frequency (10hz), square waveform

input : 9V battery or 9V DC power source

minV : 0V

maxV : +9V (voltage of battery / DC power source)

frequency : 10hz

waveform : square

duty cycle : 50%

output : alternating from 0V to +9V on 2 electrodes : electrodeA 0V electrodeB +9V then electrodeA +9V electrodeB 0V, at 10Hz, current limited at 10mA max

show me a simulation of the working circuit in a video

provide a list of components

provide a schematic and help me to understand how the components are connected

step 2 : frequency generator, biphasic, setable voltage (0V to +45V), fixed frequency (10hz), square waveform

input : 9V battery or 9V DC power source

minV : 0V

maxV : +setV between 0V and +45V

frequency : 10hz

waveform : square

duty cycle : 50%

output : alternating from 0V to +setV on 2 electrodes : electrodeA 0V electrodeB +setV then electrodeA +setV electrodeB 0V, at 10Hz, current limited at 10mA max

show me a simulation of the working circuit in a video

provide a list of components

provide a schematic and help me to understand how the components are connected

step 3 : frequency generator, biphasic, setable voltage (0V to +45V), setable frequency (1hz to 100hz), square waveform

input : 9V battery or 9V DC power source

minV : 0V

maxV : +setV between 0V and +45V

frequency : setHz between 1hz and 100hz (1hz precision)

waveform : square

duty cycle : 50%

output : alternating from 0V to +setV on 2 electrodes : electrodeA 0V electrodeB +setV then electrodeA +setV electrodeB 0V, at setHz, current limited at 10mA max

show me a simulation of the working circuit in a video

provide a list of components

provide a schematic and help me to understand how some components are connected

i want 1V precision for setV (approximately) and 1Hz precision for setHz (approximately)

we will work in 3 steps, with a milestone for each step.

once a step is complete, i will release the milestone.

i may create other(s) milestone(s) if i want to mod / add others functionalities. we will discuss about that later...

your bid is for the 1st step only !

if you have any question, don't hesitate to ask.

thanks for your interest in this project,

( 7 reviews ) CUSY, France

Project ID: #24301294

Awarded to:

AbdouSam

Hi, I have been looking into the circuit you provided, made some simulations, i found minor issues, i hope it is only in simulation, for example the duty cycle is not perfectly centered to 50%, the led flashing is awkw More

€40 EUR in 7 days
(7 Reviews)
3.4

4 freelancers are bidding on average €71 for this job

gsa5b06f37877085

Hello, I am an electronic engineer and electromechanical technical. I have more than 6 years of experience in electronic design of hardware and software. what could be done is a function generator by discrete digital More

€25 EUR in 7 days
(3 Reviews)
3.5
lingzhai12

Hi, I have read your project details and I am very interesting on your project. I have good experience in circuit design and simulation. With my professional knowledge and experience, I will provide you with help. I wi More

€20 EUR in 3 days
(0 Reviews)
0.0
nik171nan7

Hello! My name is Anton. I have a lot of experience in Engineering, Electronics, CAD / CAM, Electrical Engineering, PCB Layout, etc. I completely understand your task and I can do it perfectly. I am very fond of thi More

€200 EUR in 5 days
(0 Reviews)
0.0