Rev0VTx PLL
This page describes the Phase Locked Loop (PLL) for the rev0VTx video transmitter.
Summary
The PLL is based around the Fujitsu MB15E07SL 2.5GHz PLL IC, and runs from a single 3.3V supply. The design is based on the HobbyKing 100mW 900 MHz video transmitter, described here: Reverse Engineering the 900MHz Video System The modified design used here uses a 16 MHz crystal for the reference frequency and is controlled by an on-board ATtiny13A microcontroller. A potentiometer can be read by the microcontroller which can be used to control the VCO frequency, or a single digital pin can be controlled via servo pulse or serial communication (to be determined) to control the frequency. The gerbers, Eagle schematic and board file can be found here: http://www.rev0proto.com/files/rev0VTx_PLL.zip
Testing
PCB/Construction Photos
- Rev0VTx PLL PCB Bottom.jpg
Bottom of unpopulated PCB
- Rev0VTx PLL PCB Top.jpg
Top of unpopulated PCB
- Rev0VTx PLL Top.jpg
Populated PCB