Light bar - Revision history

Shkoo: /* Operation */

2009-04-21T04:21:25Z

Operation

← Older revision		Revision as of 21:21, 20 April 2009
Line 30:		Line 30:

	The serial bytes are sent in a format documented in the 145026 datasheet. (The trinary/high impedence capabilities of the 145026 are unused.)		The serial bytes are sent in a format documented in the 145026 datasheet. (The trinary/high impedence capabilities of the 145026 are unused.)

			The 145026 multiplexer has the following hooked up to the timing pins:

			RTC(13) 10 kohm
			CTC(12) 470 picofarad
			RS(11) 22 kohm

			According to that, the multiplexer should run at a clock speed of 1/(2.3 * 10 kohm * 470 picofarad) = about 92.506938 Khz.

			The 14029 demultiplexer has the following hooked up to the timing pins:

			RI(6) = 12 kohm -> CI(7) -> 1500 picofarad -> ground
			R2/C2(10) = 110 kohm, 3300 picofarad

			But the datasheet does not give us good timing information for that, but it looks close to the table given in the 145026 datasheet so I believe we're good.

Shkoo at 03:40, 21 April 2009

2009-04-21T03:40:13Z

← Older revision		Revision as of 20:40, 20 April 2009
Line 12:		Line 12:

	The guy that was working on it successfully activated some of the lights and the motor to turn the lights by poking at connections internal to the light bar.		The guy that was working on it successfully activated some of the lights and the motor to turn the lights by poking at connections internal to the light bar.

			== Operation ==

			There is a single serial data line that runs into the light bar. It is demultiplexed via a motorola 145029 and a pair of 4099 addressable latches.

			The format of serial packets is a sequence of 9 bits:

			0: always 0 (used for addressing)
			1: always 0 (used for addressing)
			2: always 0 (used for addressing)
			3: always 0 (used for addressing)
			4: when 1, address IC609 (PTT, RADIO, MANUAL, AIR HORN, TAKEDOWN, STROBE, LEFT ALLEY, TAP II)
			when 0, address IC608 (switched power(?), SECONDARY, PRIMARY, WAIL, YELP, HI-LO, FLOOD, RIGHT ALLEY)
			5, 6, 7: address output within IC609/IC608
			8: when 1, enable function
			when 0, disable function

			The serial bytes are sent in a format documented in the 145026 datasheet. (The trinary/high impedence capabilities of the 145026 are unused.)

SpammerHellDontDelete at 22:49, 8 April 2009

2009-04-08T22:49:56Z

← Older revision		Revision as of 15:49, 8 April 2009
Line 5:		Line 5:
	We looked it over with Jonathan Moore and Mitch, and were then distracted by other projects.		We looked it over with Jonathan Moore and Mitch, and were then distracted by other projects.

	Nils has since been working on it and has discovered the following:		[[User:shkoo\|Nils]] has since been working on it and has discovered the following:

	This thing uses all 12-volt logic, which makes sense since it would've been powered off a 12 volt battery.		This thing uses all 12-volt logic, which makes sense since it would've been powered off a 12 volt battery.

SpammerHellDontDelete at 22:47, 8 April 2009

2009-04-08T22:47:33Z

@@ Line 1: / Line 1: @@
-From what I (Nils) can remember, the light bar came from some decommissioned fire marshal car.  I don't remember who it was that brought it in or was working on it.
+[[User:Edrabbit|Ed]] and [[User:sofauxboho|Reed]] bought the light bar at the Prototype This garage sale in February '09. While it wasn't explicitly stated, it was fairly obvious that the device had been abandoned there by the Navy when they pulled out of Treasure Island in the mid 90s. This was corroborated by the US Navy Property label affixed to it.
 This thing uses all 12-volt logic, which makes sense since it would've been powered off a 12 volt battery.
@@ Line 6: / Line 12: @@
 The guy that was working on it successfully activated some of the lights and the motor to turn the lights by poking at connections internal to the light bar.

SpammerHellDontDelete at 00:16, 8 April 2009

2009-04-08T00:16:56Z

← Older revision		Revision as of 17:16, 7 April 2009
Line 8:		Line 8:


	Reed and Ed are responsible for the lightbar. Not being as well-versed in electronics as other NB members we brought it to NB to share in the hacking fun. Would love to chat with whoever actually got it working. --[[User:Edrabbit\|Edrabbit]] 17:10, 7 April 2009 (PDT)		Reed and Ed are responsible for the lightbar. It came from the Prototype This yard sale a while back. Not being as well-versed in electronics as other NB members we brought it to NB to share in the hacking fun. Would love to chat with whoever actually got it working. --[[User:Edrabbit\|Edrabbit]] 17:10, 7 April 2009 (PDT)

Edrabbit at 00:15, 8 April 2009

2009-04-08T00:15:58Z

← Older revision		Revision as of 17:15, 7 April 2009
Line 8:		Line 8:


	Reed and Ed ~~brought the light bar in after buying two of them at~~ the ~~"Prototype This" yard sale awhile back. We've been meaning to poke at it some more after our initial tear down and assessment~~. Not being as well-versed in electronics as other NB members we brought ~~one~~ to NB to share in the hacking fun. Would love to chat with whoever actually got it working. --[[User:Edrabbit\|Edrabbit]] 17:10, 7 April 2009 (PDT)		Reed and Ed are responsible for the lightbar. Not being as well-versed in electronics as other NB members we brought it to NB to share in the hacking fun. Would love to chat with whoever actually got it working. --[[User:Edrabbit\|Edrabbit]] 17:10, 7 April 2009 (PDT)

Edrabbit at 00:10, 8 April 2009

2009-04-08T00:10:38Z

← Older revision		Revision as of 17:10, 7 April 2009
Line 6:		Line 6:

	The guy that was working on it successfully activated some of the lights and the motor to turn the lights by poking at connections internal to the light bar.		The guy that was working on it successfully activated some of the lights and the motor to turn the lights by poking at connections internal to the light bar.


			Reed and Ed brought the light bar in after buying two of them at the "Prototype This" yard sale awhile back. We've been meaning to poke at it some more after our initial tear down and assessment. Not being as well-versed in electronics as other NB members we brought one to NB to share in the hacking fun. Would love to chat with whoever actually got it working. --[[User:Edrabbit\|Edrabbit]] 17:10, 7 April 2009 (PDT)

Shkoo at 23:12, 7 April 2009

2009-04-07T23:12:55Z

← Older revision		Revision as of 16:12, 7 April 2009
Line 4:		Line 4:

	It is made by "Jetsonic". Here is the manual: [[Media:Lightbar.pdf]].		It is made by "Jetsonic". Here is the manual: [[Media:Lightbar.pdf]].

			The guy that was working on it successfully activated some of the lights and the motor to turn the lights by poking at connections internal to the light bar.

Shkoo at 23:11, 7 April 2009

2009-04-07T23:11:48Z

← Older revision		Revision as of 16:11, 7 April 2009
Line 3:		Line 3:
	This thing uses all 12-volt logic, which makes sense since it would've been powered off a 12 volt battery.		This thing uses all 12-volt logic, which makes sense since it would've been powered off a 12 volt battery.

	It is made by "Jetsonic".		It is made by "Jetsonic". Here is the manual: [[Media:Lightbar.pdf]].

SpammerHellDontDelete: New page: From what I (Nils) can remember, the light bar came from some decommissioned fire marshal car. I don't remember who it was that brought it in or was working on it. This thing uses all 12...

2009-04-07T23:07:33Z

New page: From what I (Nils) can remember, the light bar came from some decommissioned fire marshal car. I don't remember who it was that brought it in or was working on it. This thing uses all 12...

New page

From what I (Nils) can remember, the light bar came from some decommissioned fire marshal car. I don't remember who it was that brought it in or was working on it.

This thing uses all 12-volt logic, which makes sense since it would've been powered off a 12 volt battery.

It is made by "Jetsonic".