Hack Notes CVA 090421 - Revision history

Elgreengeeto at 06:35, 29 April 2009

2009-04-29T06:35:34Z

← Older revision		Revision as of 23:35, 28 April 2009
Line 27:		Line 27:

	3xAAA battery holder, 2479K-ND. Plus, pin out and part for JST jack (but no LiPo included in kit).		3xAAA battery holder, 2479K-ND. Plus, pin out and part for JST jack (but no LiPo included in kit).
			(Amazingly least terrible) [http://www.keyelco.com/images/products/2479.gif schematic here].

	Provide a pin out for talking to other circuits - I2C, SPI. Plus VCC and GND.		Provide a pin out for talking to other circuits - I2C, SPI. Plus VCC and GND.

SpammerHellDontDelete: updated with new surface mount parts

2009-04-24T19:42:33Z

updated with new surface mount parts

← Older revision		Revision as of 12:42, 24 April 2009
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	#*Some drawings or pictures of a mock-up would make this easier to understand. Maybe later!		#*Some drawings or pictures of a mock-up would make this easier to understand. Maybe later!

	~~[http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=~~568-1708-5-ND ~~568-1708-5-ND]~~ = 12 bit shift register, 20-SOIC, $2.17
			568-1708-5-ND = 12 bit shift register, 20-SOIC, $2.17. Same thing 20DIP: 568-3142-5-ND.

	Sparkfun Arduino Pro Mini - 3.3V/8MHz		Sparkfun Arduino Pro Mini - 3.3V/8MHz
Line 23:		Line 24:
	http://www.sparkfun.com/commerce/product_info.php?products_id=8783		http://www.sparkfun.com/commerce/product_info.php?products_id=8783

	We want an on/off switch.		We want an on/off switch. EG1943-ND $0.92 - lower profile. CKN9564-ND, $0.53 - winner for now
	~~- [http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=EG1943-ND~~ EG1943-ND]$0.92 - lower profile
	~~- [http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=CKN9564-ND~~ CKN9564-ND], $0.53 - winner for now		3xAAA battery holder, 2479K-ND. Plus, pin out and part for JST jack (but no LiPo included in kit).

			Provide a pin out for talking to other circuits - I2C, SPI. Plus VCC and GND.

			Socket for pager motor array - double layer right angle header. 14 pins total: 7x2. Digikey # S5521-ND.

			Pin out for connections to compass IC. 6 holes in PCB, right angle female headers connect into male headers from HM55B. S4338-ND, plus S5517-ND on battery side - must clip bottom row leads.

	~~3xAAA battery holder, [http~~:~~//search~~.~~digikey~~.~~com/scripts/DkSearch/dksus~~.~~dll?Detail&name=2479K~~-~~ND 2479K~~-ND~~]. Plus, pin out and part for JST jack (but no LiPo included in kit)~~.		64KB EEPROM I2C 8 SOIC footprint: AT24C64CN-SH-B-ND. Useful for logging data from device during use e.g. motor activity. Same thing 8DIP: AT24C64C-PU-ND.

	~~Do we need mounting holes?~~ NO		Voltage Regulator. Specs: 3.3V output, >250mA. Two choices: TKS71733CT-ND accept from 1.8-14V, 280mA output, $1.52. MCP1824T-3302E/OTCT-ND accepts from 2.1-6V, 300mA, $0.79. Both require 2 external caps (typically 1uf and 2.2 or 4.7uf). These will add a few dimes more in cost.

	~~Provide a pin out for talking~~ to ~~other circuits - I2C, SPI.~~ ~~Plus VCC and GND.~~		What shape do we want the board to have? Match shape of battery holder

	~~Socket for pager motor array~~ - ~~double layer right angle header. 14 pins total: 7x2~~. ~~[http:~~/~~/search~~.~~digikey~~.~~com/scripts/DkSearch/dksus.dll?Detail&name=S5521-ND S5521-ND]~~.		JST connectors: 455-1734-1-ND (top entry), 455-1749-1-ND (side entry), $0.43/0.41 each. Females.

	Pin out for connections to compass IC. 6 holes in PCB, right angle female headers connect into male headers from HM55B. [http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=S4338-NDS 4338-ND], plus [http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=S5517-ND S5517-ND] on battery side - must clip bottom row leads.

	Bill Of Materials (BOM): we need to make a list of all parts once we have the circuit down.		Bill Of Materials (BOM): we need to make a list of all parts once we have the circuit down.

	~~What shape do~~ we ~~want the board to have~~? ~~Match shape of battery holder~~		Do we need mounting holes? NO

			They sell GPS chips for $40 now - we could put a footprint down and I bet some hackers would go nuts for that...

	People who want some boards:		People who want some boards:

Elgreengeeto at 08:35, 24 April 2009

2009-04-24T08:35:17Z

← Older revision		Revision as of 01:35, 24 April 2009
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	#The case will have thin grooves down the sides to fit the long edges of the PCB, holding it in place.		#The case will have thin grooves down the sides to fit the long edges of the PCB, holding it in place.
	#The width of the PCB+components+battery(pack) is sufficient that we can mount an HM55B compass chip at a right angle across the top without needing to add any kind of bulge for it.		#The width of the PCB+components+battery(pack) is sufficient that we can mount an HM55B compass chip at a right angle across the top without needing to add any kind of bulge for it.
	*We can achieve this by having two right angle headers, one on each side of the PCB. By using different size headers, the through-hole pins can meet the board at different heights, but the sockets will be at the same height. The width can be adjusted to match the width of the pins on the Parallax breakout board.		#*We can achieve this by having two right angle headers, one on each side of the PCB. By using different size headers, the through-hole pins can meet the board at different heights, but the sockets will be at the same height. The width can be adjusted to match the width of the pins on the Parallax breakout board.
	*Some drawings or pictures of a mock-up would make this easier to understand. Maybe later!		#*Some drawings or pictures of a mock-up would make this easier to understand. Maybe later!

	[http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=568-1708-5-ND 568-1708-5-ND] = 12 bit shift register, 20-SOIC, $2.17		[http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=568-1708-5-ND 568-1708-5-ND] = 12 bit shift register, 20-SOIC, $2.17

Elgreengeeto at 08:34, 24 April 2009

2009-04-24T08:34:30Z

← Older revision		Revision as of 01:34, 24 April 2009
Line 10:		Line 10:
	#*One downside is increased weight in one place on the armature, rather than distributed in two.		#*One downside is increased weight in one place on the armature, rather than distributed in two.
	#The case will have thin grooves down the sides to fit the long edges of the PCB, holding it in place.		#The case will have thin grooves down the sides to fit the long edges of the PCB, holding it in place.
	#The width of the PCB+components+battery(pack) is sufficient that we can mount an HM55B compass chip at a right angle across the top without needing to add any kind of bulge for it. We can achieve this by having two right angle headers, one on each side of the PCB. By using different size headers, the through-hole pins can meet the board at different heights, but the sockets will be at the same height. The width can be adjusted to match the width of the pins on the Parallax breakout board.		#The width of the PCB+components+battery(pack) is sufficient that we can mount an HM55B compass chip at a right angle across the top without needing to add any kind of bulge for it.
	#Some drawings or pictures of a mock-up would make this easier to understand. Maybe later!		*We can achieve this by having two right angle headers, one on each side of the PCB. By using different size headers, the through-hole pins can meet the board at different heights, but the sockets will be at the same height. The width can be adjusted to match the width of the pins on the Parallax breakout board.
			*Some drawings or pictures of a mock-up would make this easier to understand. Maybe later!

	[http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=568-1708-5-ND 568-1708-5-ND] = 12 bit shift register, 20-SOIC, $2.17		[http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=568-1708-5-ND 568-1708-5-ND] = 12 bit shift register, 20-SOIC, $2.17

Elgreengeeto at 08:33, 24 April 2009

2009-04-24T08:33:55Z

← Older revision		Revision as of 01:33, 24 April 2009
Line 1:		Line 1:
	Working on our Schematics today - making decisions about parts, and discovering that Eagle is hard to use.		Working on our Schematics today - making decisions about parts, and discovering that Eagle is hard to use.

	~~Use~~ Eagle software - common in the community, free for non-commercial use (and only $49 if you sell stuff that has small & simple boards)		We are trying to use Eagle software as it's common in the community, free for non-commercial use (and only $49 if you sell stuff that has small & simple boards).

	568-1708-5-ND = 12 bit shift register, 20-SOIC, $2.17		Here is the basic physical form factor we discussed:
			#On the back side of the PCB mounts a 3xAAA battery holder
			#*We can include a mount-point on the back as well for a JST connector, allowing builders to optionally use a LiPo instead of AAA's. (This way we don't have to inclue LiPo + charger in kit, which would be a further $20-$30 but it's still an easy option.)
			#On the front goes most of the components.
			#*This allows everything except the motor array to be in one case meaning simpler construction and less wires.
			#*One downside is increased weight in one place on the armature, rather than distributed in two.
			#The case will have thin grooves down the sides to fit the long edges of the PCB, holding it in place.
			#The width of the PCB+components+battery(pack) is sufficient that we can mount an HM55B compass chip at a right angle across the top without needing to add any kind of bulge for it. We can achieve this by having two right angle headers, one on each side of the PCB. By using different size headers, the through-hole pins can meet the board at different heights, but the sockets will be at the same height. The width can be adjusted to match the width of the pins on the Parallax breakout board.
			#Some drawings or pictures of a mock-up would make this easier to understand. Maybe later!

			[http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=568-1708-5-ND 568-1708-5-ND] = 12 bit shift register, 20-SOIC, $2.17

	Sparkfun Arduino Pro Mini - 3.3V/8MHz		Sparkfun Arduino Pro Mini - 3.3V/8MHz
Line 13:		Line 23:

	We want an on/off switch.		We want an on/off switch.
	- EG1943-ND $0.92 - lower profile		- [http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=EG1943-ND EG1943-ND]$0.92 - lower profile
	- CKN9564-ND, $0.53 - winner for now		- [http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=CKN9564-ND CKN9564-ND], $0.53 - winner for now

	3xAAA battery holder, 2479K-ND. Plus, pin out and part for JST jack (but no LiPo included in kit).		3xAAA battery holder, [http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=2479K-ND 2479K-ND]. Plus, pin out and part for JST jack (but no LiPo included in kit).

	Do we need mounting holes? NO		Do we need mounting holes? NO
Line 22:		Line 32:
	Provide a pin out for talking to other circuits - I2C, SPI. Plus VCC and GND.		Provide a pin out for talking to other circuits - I2C, SPI. Plus VCC and GND.

	Socket for pager motor array - double layer right angle header. 14 pins total: 7x2. ~~Digikey #~~ S5521-ND.		Socket for pager motor array - double layer right angle header. 14 pins total: 7x2. [http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=S5521-ND S5521-ND].

	Pin out for connections to compass IC. 6 holes in PCB, right angle female headers connect into male headers from HM55B. S4338-ND, plus S5517-ND on battery side - must clip bottom row leads.		Pin out for connections to compass IC. 6 holes in PCB, right angle female headers connect into male headers from HM55B. [http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=S4338-NDS 4338-ND], plus [http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=S5517-ND S5517-ND] on battery side - must clip bottom row leads.

	Bill Of Materials (BOM): we need to make a list of all parts once we have the circuit down.		Bill Of Materials (BOM): we need to make a list of all parts once we have the circuit down.

SpammerHellDontDelete: New page: Working on our Schematics today - making decisions about parts, and discovering that Eagle is hard to use. Use Eagle software - common in the community, free for non-commercial use (and o...

2009-04-21T19:44:09Z

New page: Working on our Schematics today - making decisions about parts, and discovering that Eagle is hard to use. Use Eagle software - common in the community, free for non-commercial use (and o...

New page

Working on our Schematics today - making decisions about parts, and discovering that Eagle is hard to use.

Use Eagle software - common in the community, free for non-commercial use (and only $49 if you sell stuff that has small & simple boards)

568-1708-5-ND = 12 bit shift register, 20-SOIC, $2.17

Sparkfun Arduino Pro Mini - 3.3V/8MHz
http://www.sparkfun.com/commerce/product_info.php?products_id=8824
There is a download link for Eagle schematics. Circuit includes the ATMEGA168, oscillator, passives, and serial programmer pin out. Also includes a reset button which we will eliminate.

The Pro Mini does not have the bootloader flash (ISP) pinout organized, we could copy that from the Ardiuno Pro circuit:
http://www.sparkfun.com/commerce/product_info.php?products_id=8783

We want an on/off switch.
- EG1943-ND $0.92 - lower profile
- CKN9564-ND, $0.53 - winner for now

3xAAA battery holder, 2479K-ND. Plus, pin out and part for JST jack (but no LiPo included in kit).

Do we need mounting holes? NO

Provide a pin out for talking to other circuits - I2C, SPI. Plus VCC and GND.

Socket for pager motor array - double layer right angle header. 14 pins total: 7x2. Digikey # S5521-ND.

Pin out for connections to compass IC. 6 holes in PCB, right angle female headers connect into male headers from HM55B. S4338-ND, plus S5517-ND on battery side - must clip bottom row leads.

Bill Of Materials (BOM): we need to make a list of all parts once we have the circuit down.

What shape do we want the board to have? Match shape of battery holder

People who want some boards:
Ayer - 1
Eric - 1
Skory - 1