New Desktop Microphone made today
Tested Class D Amplifier, Sounds so good!
PAM8403 module digital power amplifier board. This 2USD board makes so much difference in sound quality. The board can also be powered by 5 Volts and saves a lot of space.
Built a New Version of talkonnect today HW Version 3
New Hardware with a smaller box and Class D Amplifier. With Up/Down buttons changed.
New Features Being worked on Now
Now Talkkonnect has full keyboard control with a menu. Working to create a telnet interface so that users can telnet into the console to control talkkonnect. Will commit the new code in GITHUB once I get the chance.
Telecom Engineer (Community Member) Builds Talkkonnect!
Today I received email feedback from a telecom engineer in Serbia who wishes to stay anonymous to give his valuable feedback after using my code and the designs to build his own version of talkkonnect. He also build a handled version. So Cool! So Happy!
Pinouts for 8 Pin Microphone
Just a pinout for my modified microphone that I used that supports ptt and up/down buttons.
8 Pins Mic Jack
- Condenser MIC + (From Sound Card)
- NC
- Channel UP Button
- Channel Down Button
- MIC GND (From Sound Card)
- RBP GND (From Raspberry PI)
- PTT Switch
- NC
KiCAD Schematic of Board
The Schematic of the PCB of talKKonnect version 1.00. Learning KiCAD to make the board now. Hopefully should have a board soon.
A Youtube Video showing the working talKKonnect on a public mumble server
Connecting up the Buttons and LCD Module
| RPI Pin | Description | TalKKonnect |
| 1 | 3.3 VDC Power | NC |
| 3 | GPIO2 SDA1 (I2C) | Online LED |
| 5 | GPIO3 SCL 1(I2C) | Participant LED |
| 7 | GPIO4 GPCLK0 | Transmit LED |
| 9 | Ground | To 2.2K Resistor –> Pin 3 LCD Module |
| 11 | GPIO17 (GPIO_GEN0) | NC |
| 13 | GPIO27 (GPIO_GEN2) | NC |
| 15 | GPIO22 (GPIO_GEN3) | NC |
| 17 | 3.3 VDC Power | NC |
| 19 | GPIO10 (SPI_MOSI) | NC |
| 21 | GPIO09 (SPI_MISO) | NC |
| 23 | GPIO11 (SPI_CLK) | NC |
| 25 | Ground | NC |
| 27 | ID_SD (I2C EEPROM) | NC |
| 29 | GPIO05 | NC |
| 31 | GPIO06 | NC |
| 33 | GPIO13 | CH DOWN Button |
| 35 | GPIO19 | CH UP Button |
| 37 | GPIO26 | TX Button |
| 39 | Ground | Ground for Buttons |
| RPI Pin | Description | TalKKonnect |
| 2 | 5 VCD Power | LCD Back Light |
| 4 | 5 VCD Power | Pin 2,15 LCD MODULE |
| 6 | Ground | Pin 5 LCD MODULE |
| 8 | GPIO14 (TXD0) | NC |
| 10 | GPIO15 (RXD0) | NC |
| 12 | GPIO18 (GPIO_GEN1) | Pin 14 LCD MODULE (D7) |
| 14 | Ground | NC |
| 16 | GPIO 23 (GPIO_GEN4) | Pin 13 LCD MODULE (D6) |
| 18 | GPIO 24 (GPIO_GEN5) | Pin 12 LCD MODULE (D5) |
| 20 | Ground | NC |
| 22 | GPIO 25(GPIO_GEN6) | Pin 11 LCD MODULE (D4) |
| 24 | GPIO08 (SPI_CEO_N) | Pin 6 LCD MODULE (EN) |
| 26 | GPIO07 (SPI_CE1_N) | Pin 4 LCD MODULE (RS) |
| 28 | ID_SC(I2C ID EEPROM) | NC |
| 30 | Ground | Pin 1 LCD MODULE |
| 32 | GPIO12 | NC |
| 34 | Ground | Pin 16 LCD MODULE |
| 36 | GPIO16 | NC |
| 38 | GPIO20 | NC |
| 40 | GPIO21 | NC |