sandy_m2k2
Junior Member level 3
hi everyone..
can i get some help with my project :
Intelligent microprocessor controlled
battery charger with USB interface
The info provided by the supervisor is:
This project will complete the design and build of a sophisticated battery charger for NiMH or NiCd AA cells, aiming for a very low
component cost by implementing as much of the complexity as possible in an ARM microprocessor, probably using a Buckconfiguration
SMPS controlled digitally. The software will be implemented in C using the Keil ARM IDE providing a very high
quality simulated development environment - & downloaded to a flash programmable microcontroller.
ADVICE ABOUT THE CIRCUIT FROM THE SUPERWISER
Here is a simple analog circuit for your batt chargers.The
precise values of FETs used, and of resistors, are open to negotiation
but these should work. Use TO220 pinout FETs for
testing prototype, since these are easy to solder & replace.
The 0.47 resistor must be a power resistor, the 0.1 resistor must be power if high charging currents (>2A) are used. Otherwise 1/3W are fine.
I enclose an EAGLE library with a TC1427, and two FETs, N & P channel, in TO220 outlines. These components will work for you to make PCBs, or just to make your own circuit diagrams with PCB layout later.
When using EAGLE you will also need parts from the EAGLE libraries, specifically:
RLC, reistors and capacitors. You need to check size or resistors and capacitors and use a suitable component.
Use wirepad library for copper pad connections.
If you use a schottky diode (maybe not necessary) any schottky diode with the same size (approx) can be renames and used from the Eagle libraries.
For resistors you must calculate max av power and ensure you get a suitable resistor.
For capacitors multilayer ceramic will do for all. The only issue is what is the lead pitch - normally 0.1" or 0.2" (2.5 or 5 mm).
The inductor must also be chosen. Find one which will stand high enough currents and which is designed for switching PSU. Check RS or Farnell. You can calculate what inductance you need. There will probably be a vaguely compatible component from the Eagle libraries -in some cases all that matters is the lead pitch
I am NOT a good student and am totally lost.Pls someone help me cos otherwise i will flunk
can i get some help with my project :
Intelligent microprocessor controlled
battery charger with USB interface
The info provided by the supervisor is:
This project will complete the design and build of a sophisticated battery charger for NiMH or NiCd AA cells, aiming for a very low
component cost by implementing as much of the complexity as possible in an ARM microprocessor, probably using a Buckconfiguration
SMPS controlled digitally. The software will be implemented in C using the Keil ARM IDE providing a very high
quality simulated development environment - & downloaded to a flash programmable microcontroller.
ADVICE ABOUT THE CIRCUIT FROM THE SUPERWISER
Here is a simple analog circuit for your batt chargers.The
precise values of FETs used, and of resistors, are open to negotiation
but these should work. Use TO220 pinout FETs for
testing prototype, since these are easy to solder & replace.
The 0.47 resistor must be a power resistor, the 0.1 resistor must be power if high charging currents (>2A) are used. Otherwise 1/3W are fine.
I enclose an EAGLE library with a TC1427, and two FETs, N & P channel, in TO220 outlines. These components will work for you to make PCBs, or just to make your own circuit diagrams with PCB layout later.
When using EAGLE you will also need parts from the EAGLE libraries, specifically:
RLC, reistors and capacitors. You need to check size or resistors and capacitors and use a suitable component.
Use wirepad library for copper pad connections.
If you use a schottky diode (maybe not necessary) any schottky diode with the same size (approx) can be renames and used from the Eagle libraries.
For resistors you must calculate max av power and ensure you get a suitable resistor.
For capacitors multilayer ceramic will do for all. The only issue is what is the lead pitch - normally 0.1" or 0.2" (2.5 or 5 mm).
The inductor must also be chosen. Find one which will stand high enough currents and which is designed for switching PSU. Check RS or Farnell. You can calculate what inductance you need. There will probably be a vaguely compatible component from the Eagle libraries -in some cases all that matters is the lead pitch
I am NOT a good student and am totally lost.Pls someone help me cos otherwise i will flunk
