Hi Everyone,
New to this forum and have a circuit design problem.
My project- Aroma Generator (smell-o-vision) prototype, will have 20 oil scents which can be mixed by being heated and released to the end user.
It consists of 20 Heaters (Ceramic Resistors: 33 or 47 Ohm- whichever is best?, 5 Watt) and 19 DC Fans (12v, 0.06Amps). So around 39 channels?
What I require is a switching circuit that can either turn on a maximum of 3 ceramic resistors and 3-4 fans at the same time.
I have been recommended to use the following componants:
·39 MOSFET Transistors ,N Channel (TIP121 OR TIP141)
·8bit TTL Shift Registers , SI-PO (SN74AL164)
·20 Base Resistors (2K2 Ohms)
·20 Resistors (1K Ohms)
·19 Diodes (IN4002)
·20 Red LEDs (2v Drop) - to indicate which heaters are on
·9 Way D-Type Sockets and connectors with common ground (banks of 6?) to give a nice secure connection
The circuit board will be controlled by a microcontroller which is connected to the PC. I cant remember which one it is but it has a usb, serial and lan? Connection and is made by microchip.
I will have to learn how to programme the thing after the PCB is made, which Im absolutely dreading since i have no prior experience in C!
The supply voltage will be 12V, and i understand that the FETs switch and VGS need to be <5v so a 5v regulator will need to be in the circuit.
So basically Im tying to simulate the circuit in Multisim 10.1 then create the PCB in Ultiboard 10.1.
I have drawn the circuit diagrams for the individual heaters and fans which is attached below.
My problem is that i have no idea how to implement the shift registers with the regulator and the other components (the wiring etc) within multisim.
Can anyone give me any guidance on how to go about doing this? Any help will be massively grateful and stop me from tearing my hair out!
Circuit:
And heres cad version of what the unit will look likesorry abou the size!)
New to this forum and have a circuit design problem.
My project- Aroma Generator (smell-o-vision) prototype, will have 20 oil scents which can be mixed by being heated and released to the end user.
It consists of 20 Heaters (Ceramic Resistors: 33 or 47 Ohm- whichever is best?, 5 Watt) and 19 DC Fans (12v, 0.06Amps). So around 39 channels?
What I require is a switching circuit that can either turn on a maximum of 3 ceramic resistors and 3-4 fans at the same time.
I have been recommended to use the following componants:
·39 MOSFET Transistors ,N Channel (TIP121 OR TIP141)
·8bit TTL Shift Registers , SI-PO (SN74AL164)
·20 Base Resistors (2K2 Ohms)
·20 Resistors (1K Ohms)
·19 Diodes (IN4002)
·20 Red LEDs (2v Drop) - to indicate which heaters are on
·9 Way D-Type Sockets and connectors with common ground (banks of 6?) to give a nice secure connection
The circuit board will be controlled by a microcontroller which is connected to the PC. I cant remember which one it is but it has a usb, serial and lan? Connection and is made by microchip.
I will have to learn how to programme the thing after the PCB is made, which Im absolutely dreading since i have no prior experience in C!
The supply voltage will be 12V, and i understand that the FETs switch and VGS need to be <5v so a 5v regulator will need to be in the circuit.
So basically Im tying to simulate the circuit in Multisim 10.1 then create the PCB in Ultiboard 10.1.
I have drawn the circuit diagrams for the individual heaters and fans which is attached below.
My problem is that i have no idea how to implement the shift registers with the regulator and the other components (the wiring etc) within multisim.
Can anyone give me any guidance on how to go about doing this? Any help will be massively grateful and stop me from tearing my hair out!
Circuit:
And heres cad version of what the unit will look likesorry abou the size!)