NWI1115-dat
https://w.electrodragon.com/w/ESP_Relay_Board_VDC
Analag Input A0
| Back Side Jumper | Header text |
|---|---|
| Connect | No voltage divider, A0 directly connect to ESP-12 Module ADC pin. |
| Disconnect | A0 input via voltage divider to ADC = 220K / 100K, maximium input A0 3.3V |
- Reference calculation see here: https://learn.sparkfun.com/tutorials/voltage-dividers/all
Specific for Relay Board VDC
| Jumper | Header text | Header text | | ———————— | ————————————————————————————– | ———– | | U2 | wireless RF receiver, output TTL signal to ESP12F pins, DO -> IO2, D1 -> IO15 | - | | JP2 | Alternative power supply pin 5V-24V, = terminal power input | - | | JP7 | Power input selection, choose between 5V or 5-24V. | - | | JP1 | DHT, ADC, RST | - | | JP6 | row 1: RXD, TXD, 5V, GND, row 2: 3.3V, IO4, IO5, IO15 | - | | Green Out Input Terminal | VIN 5-26V (top / inside of the board), ground (close to the edge outside of the board) | - |
Use of AC Main Power IN to Relay
- to switch to control AC mains power, need to remove two 1206 0R resistors on board. Then power from left green terminal = relay output (and terminal)
- To supply power on board control circuit, add 6-24V power to "ALT VIN" pins
Schematic
version updates
- V4.2 added voltage divider on back side of PCB, this need to be soldered manually.
- V4.1 pin headers changed to two group. RST, ADC and DHT_IO16 pins on left side now.
