Answers.Body: <p>This is accomplished by making use of a few key elements commonly used in transmissions within Technic vehicles. Here's an overview of the internal mechanics from the instructions:</p>
  <p><a href="https://i.sstatic.net/82uRA47T.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/82uRA47T.png" alt="Step 117" /></a></p>
  <p>The dial on the right turns a worm gear moving the needle indicating the radio frequency. The orange wheel circled on the left will engage the button on the sound element when rotated. The dial on the left (the on/off switch) controls whether or not these two mechanisms are connected.</p>
  <p>Four key Technic elements are used here:</p>
  <ol>
  <li><a href="https://rebrickable.com/parts/42195/technic-driving-ring-connector-smooth-2-rounded-and-2-flat-side-walls/27/" rel="nofollow noreferrer">42195</a> Technic Driving Ring Connector Smooth</li>
  </ol>
  <p><a href="https://i.sstatic.net/bk6SVBUr.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/bk6SVBUr.png" alt="42195" /></a></p>
  <ol start="2">
  <li><a href="https://rebrickable.com/parts/18946/technic-gear-16-tooth-with-clutch-on-both-sides/" rel="nofollow noreferrer">18946</a> Technic Gear 16 Tooth with Clutch on Both Sides</li>
  </ol>
  <p><a href="https://i.sstatic.net/nudxADeP.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/nudxADeP.png" alt="42195" /></a></p>
  <ol start="3">
  <li><a href="https://rebrickable.com/parts/18947/technic-driving-ring-3l/" rel="nofollow noreferrer">18947</a> Technic Driving Ring 3L</li>
  </ol>
  <p><a href="https://i.sstatic.net/bZ5yLd8U.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/bZ5yLd8U.png" alt="18947" /></a></p>
  <ol start="4">
  <li><a href="https://rebrickable.com/parts/35188/gear-shifter/" rel="nofollow noreferrer">35188</a> Gear Shifter</li>
  </ol>
  <p><a href="https://i.sstatic.net/m2ThccDs.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/m2ThccDs.png" alt="35188" /></a></p>
  <p>When combined, these elements provide a way to build mechanisms that engage or disengage certain gears. In this set, they are placed underneath the on/off dial:</p>
  <p><a href="https://i.sstatic.net/vTXkUuGo.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/vTXkUuGo.png" alt="Gear without shifter" /></a></p>
  <p>The orange shifter is then connected to the dial to allow the sound brick to be engaged or disengaged from the frequency slider mechanism:</p>
  <p><a href="https://i.sstatic.net/Tp1b5KAJ.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/Tp1b5KAJ.png" alt="Clutch gear connected on/off dial" /></a></p>
  <p>In this way, the right dial will always move the frequency indicator, but it will produce sound if and only if the left dial is in the &quot;on&quot; position.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2024-08-23T16:06:07.490Z
Answers.LastActivityDate: 2024-08-23T16:06:07.490Z
Answers.UserDisplayName: jncraton
Body: <p>I'm aware that the <a href="https://brickset.com/sets/10334-1/Retro-Radio" rel="nofollow noreferrer">Retro Radio (10334)</a> uses a <a href="https://rebrickable.com/parts/3677c02/sound-brick-4-x-4-with-random-radio-sounds/" rel="nofollow noreferrer">sound brick</a> to produce sound:</p>
  <p><a href="https://i.sstatic.net/6SUgHDBM.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/6SUgHDBM.png" alt="Sound brick" /></a></p>
  <p>This brick produces a random sound when its single button is pressed. The right dial on the radio interacts with the brick to produce sound.</p>
  <p><a href="https://i.sstatic.net/py7inofg.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/py7inofg.png" alt="Back of box image showing dial usage" /></a></p>
  <p>However, the on/off dial on the left prevents sounds from being produced when the right dial is turned. How is this accomplished?</p>
  
Tags: <technic><sets><electronics>
Title: How does the on/off switch prevent sound from playing on the Retro Radio?
UserDisplayName: jncraton
ThreadText: # How does the on/off switch prevent sound from playing on the Retro Radio?
  
  (Asked by: username_0 on 2024-08-23)
  
  I'm aware that the [Retro Radio (10334)](https://brickset.com/sets/10334-1/Retro-Radio) uses a [sound brick](https://rebrickable.com/parts/3677c02/sound-brick-4-x-4-with-random-radio-sounds/) to produce sound:
  
  [![Sound brick](https://i.sstatic.net/6SUgHDBM.png)](https://i.sstatic.net/6SUgHDBM.png)
  
  This brick produces a random sound when its single button is pressed. The right dial on the radio interacts with the brick to produce sound.
  
  [![Back of box image showing dial usage](https://i.sstatic.net/py7inofg.png)](https://i.sstatic.net/py7inofg.png)
  
  However, the on/off dial on the left prevents sounds from being produced when the right dial is turned. How is this accomplished?
  
  **Tags:** technic, sets, electronics
  
  ---
  
  ## 1 answers
  
  ### Answer by username_0 on 2024-08-23. Score: 3 | Accepted answer
  
  This is accomplished by making use of a few key elements commonly used in transmissions within Technic vehicles. Here's an overview of the internal mechanics from the instructions:
  
  [![Step 117](https://i.sstatic.net/82uRA47T.png)](https://i.sstatic.net/82uRA47T.png)
  
  The dial on the right turns a worm gear moving the needle indicating the radio frequency. The orange wheel circled on the left will engage the button on the sound element when rotated. The dial on the left (the on/off switch) controls whether or not these two mechanisms are connected.
  
  Four key Technic elements are used here:
  
  1. [42195](https://rebrickable.com/parts/42195/technic-driving-ring-connector-smooth-2-rounded-and-2-flat-side-walls/27/) Technic Driving Ring Connector Smooth
  
  [![42195](https://i.sstatic.net/bk6SVBUr.png)](https://i.sstatic.net/bk6SVBUr.png)
  
  2. [18946](https://rebrickable.com/parts/18946/technic-gear-16-tooth-with-clutch-on-both-sides/) Technic Gear 16 Tooth with Clutch on Both Sides
  
  [![42195](https://i.sstatic.net/nudxADeP.png)](https://i.sstatic.net/nudxADeP.png)
  
  3. [18947](https://rebrickable.com/parts/18947/technic-driving-ring-3l/) Technic Driving Ring 3L
  
  [![18947](https://i.sstatic.net/bZ5yLd8U.png)](https://i.sstatic.net/bZ5yLd8U.png)
  
  4. [35188](https://rebrickable.com/parts/35188/gear-shifter/) Gear Shifter
  
  [![35188](https://i.sstatic.net/m2ThccDs.png)](https://i.sstatic.net/m2ThccDs.png)
  
  When combined, these elements provide a way to build mechanisms that engage or disengage certain gears. In this set, they are placed underneath the on/off dial:
  
  [![Gear without shifter](https://i.sstatic.net/vTXkUuGo.png)](https://i.sstatic.net/vTXkUuGo.png)
  
  The orange shifter is then connected to the dial to allow the sound brick to be engaged or disengaged from the frequency slider mechanism:
  
  [![Clutch gear connected on/off dial](https://i.sstatic.net/Tp1b5KAJ.png)](https://i.sstatic.net/Tp1b5KAJ.png)
  
  In this way, the right dial will always move the frequency indicator, but it will produce sound if and only if the left dial is in the "on" position.
  
  
  ---
  
  