There exists many Relay-Modules based on ESP8266 or other wireless Modules, but I could not find a Module that fits in a european Wallbox and is independent of protocols or wireless standards. That’s why I've created my own Solution:
Caution: These modules do not have any certifications… In most countries it’s not legal to use it in Production.
And: 230V AC can kill !
The main goals for this Project are:
- As small as possible
- As cheap as possible
- As save as possible
- As flexible as possible
Specially the flexibility is something important for me, as I have different scenarios to fulfill and I want to be able to change the wireless technology if it’s required. This is the reason why the result is not a single Module, there are currently 3 Modules: Power, Relay and Wireless (currently based on a ESP8266-12)
With a size of 45mm * 35mm * 20mm (Length, Width, Height) for all three Modules, it's small enough to mount it in wall (e.g. behind a power switch).
The price for the material is around 14$ (for all three modules).
Eagle and Gerber Files are part of this Project. The Modules are Open-Hardware, feel free to reproduce... Feedback is Welcome.
Input: 100-240V AC
Output: 5V and 3.3V DC (3W Total)
Size: 45mm * 20mm * 20mm (length, width, height)
| Item | Price (USD) |
|---|---|
| 1 * Fuse 500ma (MF2410F0.500TM) | 0.30 |
| 1 * Connector Block (4-Ports) | 0.70 |
| 2 * 47uF Tantal Capacitor | 0.90 |
| 1 * Voltage Regulator 3.3V (MC33269ST-3.3T3G) | 0.90 |
| 1 * Power-Supply 5VDC 3W (Hi-Link) | 2.75 |
| 1 * Print | 1.00 |
| Total: | 6.55 |
Size: 40mm * 20mm * 5mm (length, width, height)
| Item | Price (USD) |
|---|---|
| 4 * Resistor 10k | 0.45 |
| 1 * ESP8266-12F | 1.75 |
| 1 * Print | 1.00 |
| Total: | 3.20 |
Input: PWR 5V, Signal 3V
Output: 250V 10A
Size: 45mm * 10mm * 20mm (length, width, height)
| Item | Price (USD) |
|---|---|
| 1 * Gate Driver (MDC3105LT1G) | 0.50 |
| 1 * Relay (ALQ305) | 2.35 |
| 1 * Connector Block (2 Ports) | 0.30 |
| 1 * Print | 1.00 |
| Total: | 4.15 |