Difference between revisions of "RC08Power"
Jump to navigation
Jump to search
(→Tasks) |
|||
| (8 intermediate revisions by 3 users not shown) | |||
| Line 17: | Line 17: | ||
* Frequency does not interfere with other electronics | * Frequency does not interfere with other electronics | ||
* Protection Circuitry (TVS:Transient Voltage Suppression) | * Protection Circuitry (TVS:Transient Voltage Suppression) | ||
| − | |||
| − | ==== | + | ====Specification==== |
{| style="text-align:center;" cellspacing ="0" cellpadding="1" | {| style="text-align:center;" cellspacing ="0" cellpadding="1" | ||
|- | |- | ||
| Line 114: | Line 113: | ||
The FPGA has between a 2.5K and a 10K pullup, and between a 4K and 34.5K pulldown. Thus, the bus pins (D0-D7) are expected to draw max ~1 mA when driven into the FPGA. | The FPGA has between a 2.5K and a 10K pullup, and between a 4K and 34.5K pulldown. Thus, the bus pins (D0-D7) are expected to draw max ~1 mA when driven into the FPGA. | ||
| + | |||
| + | ==== Parts and Supplies ==== | ||
| + | |||
| + | * 3V3 @ 3 A supplies all linear regulators | ||
| + | * 2V5 | ||
| + | * 1V8 | ||
| + | * 1V2 | ||
====Battery==== | ====Battery==== | ||
* Packs need to be configured to give out 12V | * Packs need to be configured to give out 12V | ||
* Orientation and number need to be spec'd by both EE and ME | * Orientation and number need to be spec'd by both EE and ME | ||
| − | * Possible on-board charger? | + | * <strike>Possible on-board charger?</strike> maybe in 2009 |
* Battery health monitor | * Battery health monitor | ||
| + | * Affordable | ||
| + | |||
| + | Similar to last year, we will probably go with NiMh batteries because we cannot afford Li*. | ||
| + | |||
| + | Quick notes on available batteries | ||
| + | |||
| + | Tenergy Batteries have done well (enough) in [http://www.my3cents.com/showReview.cgi?id=13300 tests], and the [http://www.google.com/search?q=tenergy+review internet] seems to think they are ok. | ||
| + | * [http://www.all-battery.com/index.asp?PageAction=VIEWPROD&ProdID=1350 2600 mAh AAs] 20 pcs @ $24 free shipping and a travel charger | ||
| + | * [http://www.all-battery.com/index.asp?PageAction=VIEWPROD&ProdID=1342 2300 mAh AAs] 20 pcs @ $26 with solder tabs | ||
| + | |||
| + | Supposedly these coupons "tenergy2547" and "septspecials" can save us 10% from [http://forums.slickdeals.net/showthread.php?sduid=0&t=602086 this] slickdeals post. | ||
| + | |||
| + | This coupon "tenergydeals" will supposedly get free shipping. | ||
| + | |||
==Schematics== | ==Schematics== | ||
<gallery> | <gallery> | ||
| − | Image:RC_08_pwr_supp.jpg|Power Supply Schematic | + | Image:RC_08_pwr_supp.jpg|Power Supply Schematic for Rev1 |
</gallery> | </gallery> | ||
| Line 140: | Line 160: | ||
<br> | <br> | ||
*[[RoboCupElectrical|Electrical System]] | *[[RoboCupElectrical|Electrical System]] | ||
| + | |||
| + | [[Category: RC Electrical]] | ||
| + | |||
| + | [[Category:2007-2008]] | ||
Latest revision as of 20:01, 24 May 2020
The 2008 power supply circuit uses the same switching topology as the 2007 system with some changes, most notably a jump in system voltage to 12V from 9V to support the new motors. Another change is more analysis in the design phase including looking at possible interference with the radio and other devices that use oscillators.
Contents
Tasks
- [X] Finalize specs on voltages, maximum current draw, and allowable frequencies
- [X] Select a part based on the spec
- [X] Determine how to mount batteries
- [X] CAD the design
- [X] Verify the design
- [X] Fabricate Prototype
Specifications
Power Supply
- 12V operation
- Small package
- Low inductance
- High allowable RL (so we can use smaller inductors)
- Frequency does not interfere with other electronics
- Protection Circuitry (TVS:Transient Voltage Suppression)
Specification
| Part | VBatt | 5V | 3.3V | 2.5V | 1.8V | 1.2V |
|---|---|---|---|---|---|---|
| FPGA | 1 mA + 12*n mA n pins high |
8 mA typ 12 mA max |
8 mA typ 27 mA max | |||
| ARM | 15 mA max | 15 mA max | ||||
| HP3 RX | ||||||
| HP3 TX | ||||||
| FET Drivers (each) | 9mA | |||||
| FET Drivers (total) | 45mA | |||||
| Maxon Halls | ?? | |||||
| Micro Mo Halls | ?? | |||||
| Kicker Board | 4A (when charging) |
The FPGA has between a 2.5K and a 10K pullup, and between a 4K and 34.5K pulldown. Thus, the bus pins (D0-D7) are expected to draw max ~1 mA when driven into the FPGA.
Parts and Supplies
- 3V3 @ 3 A supplies all linear regulators
- 2V5
- 1V8
- 1V2
Battery
- Packs need to be configured to give out 12V
- Orientation and number need to be spec'd by both EE and ME
Possible on-board charger?maybe in 2009- Battery health monitor
- Affordable
Similar to last year, we will probably go with NiMh batteries because we cannot afford Li*.
Quick notes on available batteries
Tenergy Batteries have done well (enough) in tests, and the internet seems to think they are ok.
- 2600 mAh AAs 20 pcs @ $24 free shipping and a travel charger
- 2300 mAh AAs 20 pcs @ $26 with solder tabs
Supposedly these coupons "tenergy2547" and "septspecials" can save us 10% from this slickdeals post.
This coupon "tenergydeals" will supposedly get free shipping.
Schematics
Power Supply Schematic for Rev1
Parts
Power Supply
Quick Specs
Data Sheet
Battery
Quick Specs
Data Sheet
Articles
Links
