Input Gain and Volume Control Design

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Work completed
  • Project description updated to “Hand-Gesture Car Transmitter with Arduino Nano, nRF24L01, and MPU6500”
  • System architecture defined in Mermaid and stored in project properties
  • Major ICs and modules placed: Arduino Nano header/module, nRF24L01 wireless module, MPU6500 IMU, 3.3 V LDO regulator, PCA9306 I2C level shifter
  • 0.1 µF decoupling capacitors added at each IC power pin
Tasks remaining
  • Add 10 µF bulk capacitors near the LDO output and at each module power input
  • Add 4.7 kΩ pull-up resistors on SDA/SCL lines
  • Place connectors (USB power, battery input, programming/test header)
  • Wire power nets (VIN/5 V → LDO IN, LDO OUT → 3.3 V, common GND)
  • Wire SPI nets between Nano and nRF24L01
  • Wire I2C nets through PCA9306 to the MPU6500
  • Wire control pins (nRF24L01 CE/CSN, LDO EN)
  • Review schematic completeness, adjust passive ratings, assign footprints
  • Define board outline, layer stackup, ground pour, mounting holes, and preliminary component placement
Success criteria status
  • ✅ Arduino Nano, nRF24L01, MPU6500, LDO, decoupling caps, and level shifter are in place
  • ⚠️ Bulk capacitors, I2C pull-ups, full net wiring, connectors, and PCB prep are still pending
Next step Add the 10 µF bulk decoupling capacitors and the 4.7 kΩ I2C pull-up resistors in the schematic to complete the supporting power network.
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Raspberry Pi 2,3 and 4 Model B

Raspberry Pi 2,3 and 4 Model B
Description

Created
Last updated by nico
1 Contributor(s)
nico

Controls

Properties

System Architecture
graph LR PWR([USB/Battery Input]) LDO[LDO 3.3V Regulator] Nano[Arduino Nano] NRF[nRF24L01 RF Module] LS[I2C Level Shifter] IMU[MPU6500 IMU] PWR -->|5V| Nano PWR -->|5V| LDO LDO -->|3.3V| Nano LDO -->|3.3V| NRF LDO -->|3.3V| IMU Nano -- SPI --> NRF Nano -- I2C --> LS --> IMU

Availability & Pricing

DistributorQty 1
Arrow$0.72–$1.00
Digi-Key$1.07–$2.24
LCSC$0.46
Mouser$1.62
TME$0.81
Verical$1.00

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