I wanted to build a fully remotable LZ1AQ Active Antenna controller with off the shelf components. It is very cheap to buy ESP8266 MCUs and multi-channel relay boards online. Why reinvent the wheel? This project can be easily adapted to control remote antenna switches and other devices that can be controlled with relays.
|NodeMCU V2||Microcontroller with ESP8266||1|
|N/A||4 Channel Relay Module (Active Low)||1|
|RM2055M||Hammond Enclosure (50 mm x 140 mm x 190 mm)||1|
|HC-6||Adhesive PCB Supports||8|
|BK/HTB-24M-R||Fuse Holder 5mm x 20mm||1|
|5MF 300-R||Fuse 300 mA 5mm x 20mm||10|
|N/A||DC Connector of your choice||1|
|N/A||Panel Mount Micro USB Extension||1|
|N/A||Dupont Jumpers Wires||Lots|
I used PC Motherboard standoffs and screws to rest the power inserter in the enclosure. It is not mounted permanently to allow easy removal of the front panel.
1 0 0 Loop A
0 1 0 Loop B
1 1 0 A + B
0 0 1 Vertical
Note: My code has pin 1 inverted so Loop A is in the Normally Closed position. This allows the loop to function in A mode with no power applied to the MCU or relay board.