EspositoWang - Revision history

imported>Projects221: /* Arduino Code Development */

2013-04-04T00:53:32Z

Arduino Code Development

← Older revision		Revision as of 00:53, 4 April 2013
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	"TON_###" where ### is any integer number of milliseconds to turn on each LED.		"TON_###" where ### is any integer number of milliseconds to turn on each LED.

	"TINT_###" where ### is any integer number of milliseconds between turning on each LED.		"TINT_###" where ### is any integer number of milliseconds between turning on each LED.

	"TRIG" triggers all integers sequentially.		"TRIG" triggers all integers sequentially.

	"TSIG" triggers all integers simultaneously.		"TSIG" triggers all integers simultaneously.

imported>Projects221: /* Arduino Code Development */

2013-04-04T00:53:13Z

Arduino Code Development

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 </gallery>
 </center>
 == Results of Complete System ==

imported>Projects221: /* Files */

2013-04-04T00:49:45Z

Files

← Older revision		Revision as of 00:49, 4 April 2013
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	LED characterization data tables: [[File:LED_characterization_data.zip]]		LED characterization data tables: [[File:LED_characterization_data.zip]]

	Arduino code for driving LED circuit: [[File:~~LED_Driver~~.zip]]		Arduino code for driving LED circuit: [[File:LED_Driver_2_2.zip]]

	===Videos===		===Videos===

imported>Projects221: /* Super Capacitor Charging/Discharging Design Testing */

2013-03-18T23:39:08Z

Super Capacitor Charging/Discharging Design Testing

← Older revision		Revision as of 23:39, 18 March 2013
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	Testing was performed using a bench-top power supply for power, and a pair of digital multimeters measuring current through and voltage across the capacitors. We found that the circuit will draw as much as 2.7 Amps when supplied with a 12V input and will charge the capacitors from 0V to a full 7V charge in under a minute. A partial recharge only takes a few seconds.		Testing was performed using a bench-top power supply for power, and a pair of digital multimeters measuring current through and voltage across the capacitors. We found that the circuit will draw as much as 2.7 Amps when supplied with a 12V input and will charge the capacitors from 0V to a full 7V charge in under a minute. A partial recharge only takes a few seconds.

			[[File: charging_circuit_sensing.JPG\|thumb\|center\|border\|300x400px\|Charging circuit with voltage sensing from Arduino]]

	====Capacitor discharge profile====		====Capacitor discharge profile====

imported>Projects221: /* Circuit Discussion */

2013-03-18T23:38:50Z

Circuit Discussion

← Older revision		Revision as of 23:38, 18 March 2013
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	[[File: Cap_discharge_profile.png\|thumb\|center\|border\|300x400px\|Capacitor discharge profile]]		[[File: Cap_discharge_profile.png\|thumb\|center\|border\|300x400px\|Capacitor discharge profile]]

	~~====Circuit Discussion====~~

	~~[[File: charging_circuit_sensing.JPG\|thumb\|center\|border\|300x400px\|Charging circuit with voltage sensing from Arduino]]~~

	=== Prototype Circuit ===		=== Prototype Circuit ===

imported>Projects221: /* Prototype Circuit */

2013-03-18T23:38:24Z

Prototype Circuit

← Older revision		Revision as of 23:38, 18 March 2013
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	=== Prototype Circuit ===		=== Prototype Circuit ===

	~~Video~~ of LED driver circuit testing can be found in the Appendix.		Videos of LED driver circuit testing can be found in the Appendix.

	<center>		<center>

imported>Projects221: /* Arduino Code Development */

2013-03-18T23:38:05Z

Arduino Code Development

← Older revision		Revision as of 23:38, 18 March 2013
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	<center>		<center>
	<gallery widths=200px heights=200px caption="~~Energizer Max 9V Alkaline Battery Performance Curves~~">		<gallery widths=200px heights=200px caption="Arduino Code Process Flow">
	File:Psych_software_3.png\|Overall program flow		File:Psych_software_3.png\|Overall program flow
	File:Psych_software_2.png\|Trigger sequence		File:Psych_software_2.png\|Trigger sequence

imported>Projects221: /* Super Capacitor Charging/Discharging Design Testing */

2013-03-18T22:49:23Z

Super Capacitor Charging/Discharging Design Testing

← Older revision		Revision as of 22:49, 18 March 2013
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	The controlled current source works by using a transistor (MOSFET) to drive current into the capacitors. Voltage regulation is delegated to the Arduino micro-controller, which senses the voltage across the capacitors using an analog input and then disconnects the charging circuitry once the capacitors have been charged to the desired voltage.		The controlled current source works by using a transistor (MOSFET) to drive current into the capacitors. Voltage regulation is delegated to the Arduino micro-controller, which senses the voltage across the capacitors using an analog input and then disconnects the charging circuitry once the capacitors have been charged to the desired voltage.

	Testing was performed using a bench-top power supply for power, and a pair of digital multimeters measuring current through and voltage across the capacitors. We found that the circuit will draw as much as 2.~~7Amps~~ when supplied with a 12V input and will charge the capacitors from 0V to a full 7V charge in under a minute. A partial recharge only takes a few seconds.		Testing was performed using a bench-top power supply for power, and a pair of digital multimeters measuring current through and voltage across the capacitors. We found that the circuit will draw as much as 2.7 Amps when supplied with a 12V input and will charge the capacitors from 0V to a full 7V charge in under a minute. A partial recharge only takes a few seconds.

	====Capacitor discharge profile====		====Capacitor discharge profile====

imported>Projects221: /* Super Capacitor Charging/Discharging Design Testing */

2013-03-18T22:48:59Z

Super Capacitor Charging/Discharging Design Testing

← Older revision		Revision as of 22:48, 18 March 2013
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	===Super Capacitor Charging/Discharging Design Testing===		===Super Capacitor Charging/Discharging Design Testing===

	The super capacitor charge circuit was designed to charge the capacitors quickly by		The super capacitor charge circuit was designed to charge the capacitors quickly in order to provide the current necessary to drive a flash.

	Several approaches were considered for the charging circuit. Initially, we evaluated a simple voltage source system, but the current driven into the capacitors drops off exponentially, and charging a large capacitance like we have took a prohibitive amount of time (over half an hour). The solution was a current controlled charging system.		Several approaches were considered for the charging circuit. Initially, we evaluated a simple voltage source system, but the current driven into the capacitors drops off exponentially, and charging a large capacitance like we have took a prohibitive amount of time (over half an hour). The solution was a current controlled charging system.

imported>Projects221: /* Super Capacitor Charging/Discharging Design Testing */

2013-03-18T22:48:24Z

Super Capacitor Charging/Discharging Design Testing

← Older revision		Revision as of 22:48, 18 March 2013
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	===Super Capacitor Charging/Discharging Design Testing===		===Super Capacitor Charging/Discharging Design Testing===

	~~Section~~ for ~~Bill~~		The super capacitor charge circuit was designed to charge the capacitors quickly by
	~~<br>~~		Several approaches were considered for the charging circuit. Initially, we evaluated a simple voltage source system, but the current driven into the capacitors drops off exponentially, and charging a large capacitance like we have took a prohibitive amount of time (over half an hour). The solution was a current controlled charging system.
	~~Discuss about how~~ the ~~works~~ and was ~~tested~~...~~Video~~ of the ~~charging/discharging~~ with ~~arduino sensing is~~ in ~~the appendix~~. ~~All videos are uploaded with captions~~.
			The controlled current source works by using a transistor (MOSFET) to drive current into the capacitors. Voltage regulation is delegated to the Arduino micro-controller, which senses the voltage across the capacitors using an analog input and then disconnects the charging circuitry once the capacitors have been charged to the desired voltage.

			Testing was performed using a bench-top power supply for power, and a pair of digital multimeters measuring current through and voltage across the capacitors. We found that the circuit will draw as much as 2.7Amps when supplied with a 12V input and will charge the capacitors from 0V to a full 7V charge in under a minute. A partial recharge only takes a few seconds.

	====Capacitor discharge profile====		====Capacitor discharge profile====