I soldered the ac\/dc converter and used that for my power supply through a 5 volt voltage regulator. But I believe there is something wrong with it, it may be blown out or burned. At first it got very hot ( I may have wired it incorrectly the first time) then the voltage readings I was getting from the ground to power were whatever I set them on the ac\/dc converter, or close to that. So I just put that onto 4.5 volts, and the actual reading I got in the circuit was 4.8 Volts. ( I later realized, when I bought a new one, that I had wired it wrong, so it works fine).<\/p>\n
The Voltage between the switch and the power when it is on is zero, and when it is off is 3.6 Volts. There is no voltage anywhere else in the circuit when it is off. When on, there is no voltage in the switch, the voltage in the resistor is 3V, and through the LED is 1.8V, so the total is 4.8V, which is the total voltage input. I am losing power through heat and light when the LED is on, but I guess its so little that it wouldn’t be noticeable here.<\/p>\n
[wpvideo MP0SWE9H]<\/p>\n
With the 2LEDs in serial, the voltage across the 220 Ohm resistor was 1.345 V. The voltage across each LED was 1.732V . The total is 4.809 V, which is the same as the input voltage.<\/p>\n
Adding a third red LED made them dimmer, and reduced the voltage across the resistor to 19.3mV and across each LED to 1.53V. The voltage drop across the resistor with the addition of new LEDs surprised me, because I didn’t realize that the resistor values were maximum values. The way that electrons disperse through the circuit is really efficient and amazing to me. It makes perfect sense.<\/p>\n
When a red and green LED are connected in this series, the red reads 1.72V and the green reads 1.98 V.<\/p>\n
In parallel the two red LEDs drew .007Amps. In series the two arms of the meter can measure from each end of the circuit segment. In parallel, each segment or circuit element has a direct path to ground and to the power source. In serial the current is constant throughout the circuit, and is equal to the entire current. In parallel the current is divided proportionally to the resistance of the circuit parts. The meter has to go from the anode to the ground to read the current.<\/p>\n
In the final part of the lab I measure the voltage at the center pin of the potentiometer to watch the voltage increase and decrease with the brightness of the LED. It was sending more voltage as its resistance was turned down by the nob, for a max of 4.79V, and a minimum of 1.68V, where the LED was just slightly lit.<\/p>\n","protected":false},"excerpt":{"rendered":"
I soldered the ac\/dc converter and used that for my power supply through a 5 volt voltage regulator. But I believe there is something wrong with it, it may be blown out or burned. At first it got very hot ( I may have wired it incorrectly the first time) then the voltage readings I […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,24,1],"tags":[],"class_list":["post-179","post","type-post","status-publish","format-standard","hentry","category-labs","category-physical-computing","category-uncategorized"],"_links":{"self":[{"href":"http:\/\/www.mariarabinovich.com\/blog\/wp-json\/wp\/v2\/posts\/179","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.mariarabinovich.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.mariarabinovich.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.mariarabinovich.com\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"http:\/\/www.mariarabinovich.com\/blog\/wp-json\/wp\/v2\/comments?post=179"}],"version-history":[{"count":8,"href":"http:\/\/www.mariarabinovich.com\/blog\/wp-json\/wp\/v2\/posts\/179\/revisions"}],"predecessor-version":[{"id":435,"href":"http:\/\/www.mariarabinovich.com\/blog\/wp-json\/wp\/v2\/posts\/179\/revisions\/435"}],"wp:attachment":[{"href":"http:\/\/www.mariarabinovich.com\/blog\/wp-json\/wp\/v2\/media?parent=179"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.mariarabinovich.com\/blog\/wp-json\/wp\/v2\/categories?post=179"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.mariarabinovich.com\/blog\/wp-json\/wp\/v2\/tags?post=179"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}