Podcast Notes Parker has a new update to the Jeep Bluetooth Radio Mod. To level shift the Bluetooth audio to what the TDA7340S expects, Parker is going to build a differential opamp. The Bluetooth audio adapter has a 50mV DC offset and a 1.9V Pk-Pk at max volume where the TDA7429L is expecting a 4.65V DC offset with a 800mV Pk-Pk. See Figure 1. Stephen has a crazy idea to make the "ultimate" inexpensive resistor standard. His plan is to use a big array of resistors that are in parallel/series. He hops that statistically it will swamp out the tolerance. Stephen will use different manufactures to swamp out batch issues. Next week we should have some analysis on this project done. Analog-EETimes article: Why the zero-ohm resistor? NASA Wants SpacePoop Hackers. Reminds Parker of this Apollo 10 radio transcription. See page 416. New Bluetooth 5 spec is out. Key updates to Bluetooth 5 include longer range, faster speed, and larger broadcast message capacity. Samsung exploding battery update. Special thanks to whixr over at Tymkrs for the intro and outro!
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