Takuya's Blog
WPR: -1/10
- This week -Missed meeting , since out of town
- Next week
- Submit task chosen to Andrew
- Submit rough draft of a project proposal
- Project Schedule
WPR: 1/11- 1/17
This week
- Go over project requirements
- Understand each task for the project
- Decided my task (Rocket bus connector, telemetry connector, Switching power supply)
- Installed Cygwin/git, and learned how to manage revision in PSAS repository
- Read previous capstone report
Next week
- Deepen Understanding of All connectors required
- Come up with candidates for rocket bus connectors
- More research on 2009 capstone
WPR: 1/18- 1/25
This week
- Researched 2009 capstone for rocket bus connector
- Search for Rocket bus, Telemetry connector
- SPS module part search
- Researched TQM 5200 pin functions
- Discussed Rocket bus, telemetry connector requirements
- Discussed power supply requirements
Next week
- Decide on Power supply IC
- Create Eagle library
- Ask question about power supply requirements
WPR: 1/26- 2/1
- This week
- Parts search for power supply
- Relearned Eagle schematic
- Discussed about requirement for power supply
- Next week
- Ask question about power supply requirements
- Design power supply
WPR: 2/2- 2/8
- This week
- Creating Eagle library for LTM4619 (SPS module)
- Designing power supply circuit
- Research on Power protection circuits
- Next week
- Create the first draft for power supply module
- Confirm design with Andrew
- Ask question about active protection for over voltage lock out
WPR: 2/9- 2/15
- This week
- First draft of power supply schematic
- Confirm modified over voltage protection with Andrew
- Discuss about switching frequency of SPS
- Next week
- Modify LTM4619 Eagle library
- Figure out clock synchronization of SPS
WPR: 2/16- 2/22
- This week
- Ask question about External clock for SPS.
- Researched TQM5200 and MPC5200 for clock signal
- Designed frequency divider for SPS clock
- Next week
- Verify Second power supply capacitor value for OVLO detector IC
- Research over current breakdown threshold design with MAX5902
- Create library parts for frequency dividers.
- Complete schematic for frequency dividers.
WPR: 2/23- 3/1
- This week
- Verify Input and output level of cascaded frequency divider matches with spec with Andrew
- Modified and removed unnecessary nodes inactive protection.
- Modified power supply module design
- Next week
- Recalculate over current detecting resistor value.
- Modify Frequency divider connection to SPS
- Modify SPS INTVcc and EXTVcc connection
- Review the protection circuit
- Documentation for protection circuit and SPS
WPR: 3/2- 3/8
- This week
- Reviewed shut down events conditions of active protection
- Clean up miner errors in the schematic
- Edited documentation of functionalities and justifications
- Next week
- Final schematic review
WPR: 3/9- 3/15
This week
- Schematic review with Andrew
Next week
- Final clean up of the schematic
WPR: 3/30- 4/5
- This week
- Reschedule regular meeting time
- Next week
- Board layout
WPR: 4/7-4/13
- This week
- Leaned how to do board layout
- Discuss about pads and via problem of SPS IC
- Next week
- Start board layout SPS part
WPR: 4/14-4/20
- This week
- First version of the board layout done(SPS and protection part)
- Q and A about layout with Andrew
- Next week
- Optimize layout
WPR: 4/21-4/27
This week
- Edited the boardout
- Q and A about board layout with Andrew
Next week
- Error check
WPR: 4/28-5/4
- This week
- Edited the board layout
- Next week
- Error check
WPR: 5/5-5/11
- This week
- Corrected errors
- Next week
- Finish up the board layout
WPR: 5/12-5/18
- This week
- Minor changes in board layout
- Next week
- Create BOM
- Order parts
Notes
Tak: I found this connector today by accident, it actually looks very, very good. It's got just about everything we want, including screws to lock it down to the board and to lock the connectors together, and it caries 2.2A per pin. It may be bigger than the current rocket bus connector, however. See http://harwin.com/M83-LML3M5N18-0000-000-datamate-3-row-male-horizontal-pc-tail-connector-family.html. Note that you should put together a L x W x H table so you can compare solutions.