AY Honors/Radio Electronics/Answer Key - Revision history

W126jep: - Category of AYHAB

2022-07-18T23:29:41Z

- Category of AYHAB

MBoismier at 19:35, 24 September 2021

2021-09-24T19:35:13Z

MBoismier at 19:33, 24 September 2021

2021-09-24T19:33:40Z

W126jep: Marked this version for translation

2021-05-18T21:16:02Z

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W126jep at 21:15, 18 May 2021

2021-05-18T21:15:50Z

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2021-03-19T03:36:06Z

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2021-01-23T17:35:52Z

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Jomegat bot: Jomegat bot moved page Adventist Youth Honors Answer Book/Vocational/Radio Electronics to AY Honors/Radio Electronics/Answer Key: Bot: Moved page

2020-12-20T15:34:05Z

Jomegat bot moved page AY Honor Radio Electronics to AY Honor Radio Electronics Answer Key: Bot: Moved page

Jomegat at 04:58, 20 November 2020

2020-11-20T04:58:01Z

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 ==Historical Notes== <!--T:79-->
 This honor was original named ''Radio Mechanics''. The name was changed to ''Radio Electronics'' in 1956.
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	[http://www.electronics-tutorials.com/devices/lm3914.htm Bar Graph Meter].		[http://www.electronics-tutorials.com/devices/lm3914.htm Bar Graph Meter].

−	~~<!--T:67-->~~
−	~~Here's another link for building a~~
−	~~[http://braincambre500.freeservers.com/ddv.htm Digital Dashboard Meter].~~

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 Another option for building these is to buy a kit.  You can buy kits for individual projects or you can buy general purpose kits that will let you experiment with many different circuits.  Check with Radio Shack to see their current offerings.  Electronics kits can also be found at toy stores, especially those that emphasize "learning" toys.  Such suppliers include Toys R Us and Imaginarium, both of which offer kits over the Internet via Amazon.
-=== Photocell Guard or Counter === <!--T:54-->
+===a. Photocell Guard or Counter === <!--T:54-->
 The Photocell Guard circuit is a photo sensitive switch that will either turn on or turn off some device.  In modern terminology, it would be called a photo-sensitive switch.  A Photocell Counter is a circuit which counts the number of times a photo-sensitive switch is activated.  In modern terminology, it would be called a Photo-sensitive Counting Circuit.
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 The action of the LED can be reversed (on when dark, off when bright) by reversing the positions of R1 and R2 (the CdS cell), by swapping the positive and negative terminals of the comparator, or by connecting the LED through a resistor to ground instead of connecting it through a resistor to power.
-=== Siren === <!--T:58-->
+===b. Siren === <!--T:58-->
 [[Image:Siren_circuit.png|Siren Circuit]]
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 Finally, we come to the power amplifier.  This is a simple unity-follower op-amp, and its purpose is to drive the speaker and to isolate it from the audio oscillator.  If the speaker were connected directly to the output of the audio oscillator, it would change the characteristics of that section, and we would not hear the siren effect.
-=== Simple voltmeter === <!--T:66-->
+===c. Simple voltmeter === <!--T:66-->
 This link has some material on using an LM3914 as a
 [http://www.electronics-tutorials.com/devices/lm3914.htm Bar Graph Meter].
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 There are several analog to digital converter (including the MAX136, MAX1496, and ICL7107) chips that will directly drive any of several 7-segment LED displays.  A web search of these part numbers (or search for "3.5 digit LED" for other devices) should turn up a data sheet, and most data sheets have "typical application" sections showing how these can be connected.
-=== Pressure sensor === <!--T:69-->
+===d. Pressure sensor === <!--T:69-->
-=== Simple DC power supply ===
+===e. Simple DC power supply ===
 [[Image:Simple dc power supply schematic.png|Schematic of a Simple DC Power Supply]]
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 The circuit should be mounted in some sort of enclosure to protect the 120VAC input power terminals.  The power terminals themselves should be wrapped in electrical tape or in heat shrink tubing for additional protection.
-=== Simple transistor radio === <!--T:75-->
+===f. Simple transistor radio === <!--T:75-->
 Although this
 [http://www.somerset.net/arm/fm_only_one_transistor_radio.html FM Radio Project] uses only one transistor, it is ''still'' fairly complicated.  It might be better to buy a kit for this one.  Check with Radio Shack.

AY Honors/Radio Electronics/Answer Key - Revision history

W126jep: - Category of AYHAB

MBoismier at 19:35, 24 September 2021

MBoismier at 19:33, 24 September 2021

W126jep: Marked this version for translation

W126jep at 21:15, 18 May 2021

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Jomegat bot: Jomegat bot moved page Adventist Youth Honors Answer Book/Vocational/Radio Electronics to AY Honors/Radio Electronics/Answer Key: Bot: Moved page

Jomegat at 04:58, 20 November 2020

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