Prarthana - Revision history

Prarthana: /* Magic instrument */

2015-10-18T02:04:57Z

‎Magic instrument

Prarthana: /* Project: Making a toy */

2015-10-18T02:03:43Z

‎Project: Making a toy

Prarthana: /* 555 oscillator */

2015-10-18T01:47:08Z

‎555 oscillator

Prarthana: /* Capacitors and Diodes */

2015-10-18T01:45:57Z

‎Capacitors and Diodes

Prarthana: /* Making an amplifier */

2015-10-18T01:45:03Z

‎Making an amplifier

Prarthana: /* Transistors */

2015-10-18T01:28:18Z

‎Transistors

Prarthana: /* Knight rider */

2015-10-18T01:24:46Z

‎Knight rider

Prarthana: /* Making a crazy switch */

2015-10-18T01:20:27Z

‎Making a crazy switch

Prarthana: /* Making a crazy switch */

2015-10-18T01:20:02Z

‎Making a crazy switch

Prarthana: /* Making a crazy switch */

2015-10-18T01:19:09Z

‎Making a crazy switch

@@ Line 137: / Line 137: @@
 ===Magic instrument===
 We made a magic ball, which would glow brighter as your hand gets closer to it. We used an LDR and programmed the Arduino in terms of the distance of hand and the LDR and the voltage readings. Later we used ‘if’ and ‘then’ options for programming. It was disappointing that the lights were very dull inside the box that’s where it appeared even lighter as we placed the, inside the translucent work. Also the LDR used gave a very short range of number readings between two light sources given.
 [[File:Magic 1.jpg|200px]]

← Older revision		Revision as of 02:03, 18 October 2015
Line 97:		Line 97:

	Before making the final toy, I tried out my circuits on the breadboard, where it functioned well separately. I wasn’t able to club the two circuits, of the LED’s and the motor. Later I decided to just keep separate circuits. When I did actually solder these two on a PCB the one where I used LDR didn’t work. I desoldered it and tried soldering it again, it still didn’t function accordingly, so for then I just decided to have continuously glowing eyes.		Before making the final toy, I tried out my circuits on the breadboard, where it functioned well separately. I wasn’t able to club the two circuits, of the LED’s and the motor. Later I decided to just keep separate circuits. When I did actually solder these two on a PCB the one where I used LDR didn’t work. I desoldered it and tried soldering it again, it still didn’t function accordingly, so for then I just decided to have continuously glowing eyes.
		+
		+	[https://www.youtube.com/watch?v=MyHi1NwVwGQ&feature=youtu.beI\| Click here] to watch the video.

	[[File:Toy 2.jpg\|200px]]		[[File:Toy 2.jpg\|200px]]

← Older revision		Revision as of 01:47, 18 October 2015
Line 86:		Line 86:

	I had never seen an IC chip before, the entire idea of it seemed very complicated to me. As soon as I saw the circuit where 555 IC chip was used to make the 555IC oscillator, the entire concept seemed vague. This was especially because I was still trying to understand the function of breadboard properly. End of this class was when I completely understood how to use a breadboard and could hereafter use for any complicated circuit given. Making it was not as difficult as it seemed in the schematic diagram; had to take some help here and there but it did work at the end of the day and that is what kept my confidence boosted. After making the circuit on breadboard I experimented around with using LDR and thermistor instead of the 100k resister to get varied sounds according to the light and heat respectively.		I had never seen an IC chip before, the entire idea of it seemed very complicated to me. As soon as I saw the circuit where 555 IC chip was used to make the 555IC oscillator, the entire concept seemed vague. This was especially because I was still trying to understand the function of breadboard properly. End of this class was when I completely understood how to use a breadboard and could hereafter use for any complicated circuit given. Making it was not as difficult as it seemed in the schematic diagram; had to take some help here and there but it did work at the end of the day and that is what kept my confidence boosted. After making the circuit on breadboard I experimented around with using LDR and thermistor instead of the 100k resister to get varied sounds according to the light and heat respectively.
		+
		+	[https://www.youtube.com/watch?v=Pk1WfrzQO9Y&feature=youtu.beI\| Click here] to watch the video.

	[[File:555 1.jpg\|200px]]		[[File:555 1.jpg\|200px]]

← Older revision		Revision as of 01:45, 18 October 2015
Line 67:		Line 67:

	I never understood the concept of a diode, but while experimenting on breadboard and through theory I learned that it lets the current flow in one direction only. We tested with turning it around in the circuit, when the LED stopped glowing. We connected another wire from other end to where it met the circuit to once again change its direction and hence make the LED glow. A capacitor stores energy in it, which could be used later. This was demonstrated by making a simple circuit with it. We connected it in series with other basic circuit components and saw how the LED still glowed after taking out the battery. It only lasted till less than a second, probably because of the lower capacity of the capacitor used. I later experimented with different values of capacitors, each giving a different duration till which the LED stayed lit. Nonetheless, none of the capacitors I experimented with made the LED glow for more than 2s.		I never understood the concept of a diode, but while experimenting on breadboard and through theory I learned that it lets the current flow in one direction only. We tested with turning it around in the circuit, when the LED stopped glowing. We connected another wire from other end to where it met the circuit to once again change its direction and hence make the LED glow. A capacitor stores energy in it, which could be used later. This was demonstrated by making a simple circuit with it. We connected it in series with other basic circuit components and saw how the LED still glowed after taking out the battery. It only lasted till less than a second, probably because of the lower capacity of the capacitor used. I later experimented with different values of capacitors, each giving a different duration till which the LED stayed lit. Nonetheless, none of the capacitors I experimented with made the LED glow for more than 2s.
		+
		+	[https://www.youtube.com/watch?v=v5-37d8x5N0&feature=youtu.beI\| Click here] to watch the video.

	[[File:Diode 2.jpg\|200px]]		[[File:Diode 2.jpg\|200px]]

← Older revision		Revision as of 01:45, 18 October 2015
Line 105:		Line 105:

	We were then asked to make the same circuit on a PCB, soldering and securing all the connections. I was very excited to do this as this would give rise to my very own amplifier that is compact and portable! Also this was a chance for me to finally take out my fear of soldering and making circuits on PCB. I always feared that it wouldn’t work. So when I did start, I went very systematically, soldering each and every connection neatly, ensuring that it isn’t touching some other connection. Luckily the amplifier started working on the first try! I felt excess joy and this raised confidence in me to make many such electronics devices for myself. Now the next task was to give it an aesthetically appealing cover. I initially put it in a white cylindrical container, cutting out cavities for the potentiometer shaft, toggle switch, audio-jack and the speaker. However it wasn’t the best that I could do. Later I made another vertical shaped cover for it. I wanted it to be such that it sort of merges and goes with my table. For which I chose a casual paper weave using colors orange and blue, which went well with my study table. However, I am not completely happy with my design I would later like to work on an even better design and I would love to use acrylic sheets for doing so.		We were then asked to make the same circuit on a PCB, soldering and securing all the connections. I was very excited to do this as this would give rise to my very own amplifier that is compact and portable! Also this was a chance for me to finally take out my fear of soldering and making circuits on PCB. I always feared that it wouldn’t work. So when I did start, I went very systematically, soldering each and every connection neatly, ensuring that it isn’t touching some other connection. Luckily the amplifier started working on the first try! I felt excess joy and this raised confidence in me to make many such electronics devices for myself. Now the next task was to give it an aesthetically appealing cover. I initially put it in a white cylindrical container, cutting out cavities for the potentiometer shaft, toggle switch, audio-jack and the speaker. However it wasn’t the best that I could do. Later I made another vertical shaped cover for it. I wanted it to be such that it sort of merges and goes with my table. For which I chose a casual paper weave using colors orange and blue, which went well with my study table. However, I am not completely happy with my design I would later like to work on an even better design and I would love to use acrylic sheets for doing so.
		+
		+	[https://www.youtube.com/watch?v=7cdk0gnZQVc&feature=youtu.beI\| Click here] to watch the video.

	[[File:Amplifier 1.jpg\|200px]]		[[File:Amplifier 1.jpg\|200px]]

← Older revision		Revision as of 01:28, 18 October 2015
Line 74:		Line 74:

	Initially when we made a circuit with transistor, using 22k and 1k resistance, I didn’t quite understand the use of it. Later after some theory and experimentation with LDR did I get to know about it’s amplifying qualities. It was interesting how, instead of one of the resistors we used our body resistance to complete the circuit! Never knew our body had resistance, which could be used in such a way. This idea could be used to make so many cool things, from magic trick toys to just fascinating products and objects. I remember, as a kid, I used to own a lamp, which would light up as you touch it. Now with knowledge of all these electrical components I’m starting to unravel my childhood magic items.		Initially when we made a circuit with transistor, using 22k and 1k resistance, I didn’t quite understand the use of it. Later after some theory and experimentation with LDR did I get to know about it’s amplifying qualities. It was interesting how, instead of one of the resistors we used our body resistance to complete the circuit! Never knew our body had resistance, which could be used in such a way. This idea could be used to make so many cool things, from magic trick toys to just fascinating products and objects. I remember, as a kid, I used to own a lamp, which would light up as you touch it. Now with knowledge of all these electrical components I’m starting to unravel my childhood magic items.
		+
		+	[https://www.youtube.com/watch?v=lMHZ-pIPoO8&feature=youtu.beI\| Click here] to watch the video.

	[[File:Transistor 1.jpg\|200px]]		[[File:Transistor 1.jpg\|200px]]

@@ Line 119: / Line 119: @@
 ===Knight rider===
 Once again, the interesting yet challenging math problem analogy fits right in this case. Programming and setting the circuit for knight rider was so interesting, it involved logical pattern which had to be followed. We arranged 7 red LED’s on the bread board, all of which were connected to the digital read of the Arduino. They all had a common ground wire that went to the digital ground connection on Arduino. This is when I learned that number 13 connection in digital is the only special one where there is in built resistance, for all the rest you have to add additional resistors in the circuit. The programming part was very interesting as well, it turned out to be a long code which included high of one low of another, delay and so on. Later we learned how to inculcate an int i in the programming to make it shorter. Where a mathematical equation can replace the lengthy program that we wrote earlier.
 [[File:Knight rider 1.png|200px]]

← Older revision		Revision as of 01:20, 18 October 2015
Line 39:		Line 39:

	[https://www.youtube.com/watch?v=tDg0AzLEGvo&feature=youtu.beI\| Click here] to watch the video.		[https://www.youtube.com/watch?v=tDg0AzLEGvo&feature=youtu.beI\| Click here] to watch the video.
−	[https://www.youtube.com/watch?v=6D3G3wGButI&feature=youtu.beI\| Click here] to watch ~~the~~ video.	+	[https://www.youtube.com/watch?v=6D3G3wGButI&feature=youtu.beI\| Click here] to watch second video.

← Older revision		Revision as of 01:19, 18 October 2015
Line 37:		Line 37:

	The task at hand was to make a crazy switch. Any crazy action, movement or anything that would act as a switch for either an LED to light up or a buzzer to start buzzing. As a group we brainstormed a lot and came up with four different ideas for the same. Three of the crazy switches were initiated by pressure whereas one of them was initiated by touch. One of the ideas was that an LED, attached to a flip flop, would light up as you walk. We used two different structures for that. In one, we attached an LED directly to a coin battery; in such a way that one of the legs was attached to a side, however the other would only touch as you walk. For the other flip flop, we used wires, concealed them in the design, which connected the battery to the LED. In yet another design we connected a battery in a similar fashion to a buzzer, which would cause it to buzz as a person walked. However, in this case we couldn’t use a coin battery because a buzzer required more voltage. So we had to somehow fit the 9V battery into a shoe, in a way that it is concealed, and hence build a circuit around it. The fourth switch was such that an LED would light up as you open a book. The LED in this case was placed over the book, in such a way that if it was more powerful, it would provide enough light for reading. This was a flimsy switch as we solely had to depend on the bare wires, placed on either side of the book to touch as the book opened. Hence, we had to adjust the wires in a particular position before we could demonstrate this. I would like to work further on this idea, and find a way to make the structure more concrete and durable.		The task at hand was to make a crazy switch. Any crazy action, movement or anything that would act as a switch for either an LED to light up or a buzzer to start buzzing. As a group we brainstormed a lot and came up with four different ideas for the same. Three of the crazy switches were initiated by pressure whereas one of them was initiated by touch. One of the ideas was that an LED, attached to a flip flop, would light up as you walk. We used two different structures for that. In one, we attached an LED directly to a coin battery; in such a way that one of the legs was attached to a side, however the other would only touch as you walk. For the other flip flop, we used wires, concealed them in the design, which connected the battery to the LED. In yet another design we connected a battery in a similar fashion to a buzzer, which would cause it to buzz as a person walked. However, in this case we couldn’t use a coin battery because a buzzer required more voltage. So we had to somehow fit the 9V battery into a shoe, in a way that it is concealed, and hence build a circuit around it. The fourth switch was such that an LED would light up as you open a book. The LED in this case was placed over the book, in such a way that if it was more powerful, it would provide enough light for reading. This was a flimsy switch as we solely had to depend on the bare wires, placed on either side of the book to touch as the book opened. Hence, we had to adjust the wires in a particular position before we could demonstrate this. I would like to work further on this idea, and find a way to make the structure more concrete and durable.
		+
		+	[https://www.youtube.com/watch?v=tDg0AzLEGvo&feature=youtu.beI\| Click here] to watch the video.