README.md
ESP8266 DIN mount relay

ESP8266 DIN mount relay (DPDT@10A and SPST-NO@5A) board with 433mHz RF receiver or generic input 230VAC or DC (based on jumper and resistor) and temperature sensor (DS18B20 or DHT22). Power supply is good old fashioned style transformer so no noise generated - radioamateur friendly. I2C/two pins are accesible on 2.54mm header, for you to extend capabilities.

Board features auto reset with set of GPIO0 LOW when uploading firmware via FTDI so you don't have to press any button to jump into program mode.

Picture


Please note that this is picture of v1.0 which in not available in this repo, I have updated the project to v1.1 which fixes some bugs and adds RC filter for relays

BOM

Minimal components




  
Qty
  
Component
  
Value
  
Package




  
3
  
Capacitor
  
100n
  
0805


  
1
  
Capacitor
  
100uF/16V
  
Ø5mm, grid 2.032mm


  
1
  
Capacitor
  
1000uF/16V
  
Ø10mm, grid 5mm


  
2
  
Capacitor
  
R463I24705001K
  
18x5x11mm


  
1
  
Diode bridge
  
KBP307
  



  
1
  
Shottky diode
  
BAT54S
  
SOT23


  
2
  
Diode
  
S1B
  
DO214AC (SMA)


  
1
  
Thermal fuse
  
2A/115°C
  



  
1
  
Fuse
  
TE5 500mA
  
TE5


  
1
  
DPDT relay
  
44.62.9.006.0000
  



  
1
  
SPST-NO relay
  
HF46F/005-HS1
  



  
1
  
LED
  
green
  
3mm


  
2
  
Resistor
  
1K
  
0805


  
3
  
Resistor
  
4K7
  
0805


  
4
  
Resistor
  
10K
  
0805


  
4
  
Resistor
  
160R
  
2010


  
1
  
Resistor
  
820R
  
0805


  
1
  
Varistor
  
S07K275
  



  
2
  
NPN transistor
  
BC817
  
SOT23


  
1
  
Transformer
  
BV-EI-305-2050 EI30-1
  



  
1
  
Wifi module
  
ESP8266-12
  



  
1
  
LDO regulator
  
LM1117-3.3
  
SOT223


  
3
  
Screw terminal
  
KF301-5.08-2P
  



  
1
  
Screw terminal
  
KF301-5.08-3P
  



  
1
  
Screw terminal
  
KF350-3.5-2P
  



  
1
  
Screw terminal
  
KF350-3.5-3P
  



  
1
  
DIN case
  
Z100J PS
  





If RF is required




  
Qty
  
Component
  
Value
  
Package




  
1
  
RF reciever
  
RXB6
  



  
1
  
Capacitor
  
100n
  
0805


  
1
  
Capacitor
  
0.47uF
  
SMA


  
1
  
Capacitor
  
10uF
  
SMA


  
1
  
Antenna conenctor
  

  
SMA or u.fl connector




If IN is required




  
Qty
  
Component
  
Value
  
Package




  
1
  
Diode
  
SL1M
  
SOD123


  
1
  
Opto-coupler
  
TLP185
  
SOP04


  
1
  
Resistor
  
0R
  
2010


  
1
  
Resistor
  
200K
  
2010


  
1
  
Resistor
  
10K
  
0805


  
1
  
Capacitor
  
100n
  
0805


  
1
  
Capacitor
  
100uF/16V
  
Ø5mm, grid 2.032mm