Juicy Switch 🔌🍊

A RESTful power switch. The Juicy Switch enables you to turn a 230VAC device on and off using HTTP. E.g. you can switch a 💡 on by calling http://juicy.local/on and turn it off with http://juicy.local/off.

⚠️ Disclaimer ⚡

Mains can kill or severly injure people! Please read about electrical saftey first. We designed the PCB to the best of our knowledge to be safe (see Safety and Enclosure), however use it at your own risk, we are no electrical engineers!

Design goals

• DIY (do it yourself) 🔨
• Affordable 💵
• Easy to setup and to use (your mom can use it 😉)
• Simple yet powerful 🚀

The Juicy Switch can be self assembled and is affordable, see Bill of Materials. The setup is a friction less and quick process. After the device is powered up, it will create a WIFI hotspot called juicy_switch. Connect with your Smartphone/Notebook and proceed with the one time Setup. Eventhough the switch is very simple to use, many smart use cases can be built on top, see Use Case Ideas to get inspired.

Hardware

Bill of Materials

The cost per unit is roughly 10$.

Marking	Item	Package	Value
	µC-ESP826 ESP-07	-	-
	HLK-PM01	-	-
R1,R2,R6,R8	resistor	SMD 0815	10kΩ
R3,R4	resistor	SMD 0815	1kΩ
R5	resistor	SMD 0815	120Ω
R7	varistor	THT	250VAC/2500A
C1	capacitor	SMD 0815	22µF
C2,C4	capacitor	SMD 0815	10µF
C3	capacitor	SMD	100µF
C5,C6	capactior	SMD 0815	100nF
J3,J5	screw terminal	THT	5m
D1,D3	LED	THT	3mm
D2	diode 1n4148	THT	200mA/100V/1V
F1	fuse (slow blow)	glass tube 5x20mm	0.3A
F2	fuse (fast blow)	glass tube 5x20mm	6.3A
F1,F2	fuse holder	THT 5x20mm	-
Q1	transistor npn	SMD SOT23-3	0.5A/40V
K1	relay	-	10A/250VAC
U1	voltage regulator	SOT23-3	3.3V
S1	tactile switch	SMD (4x4x1.5mm)	-
J1,J2,J4,J6	Headers	THT	-

We bought most parts from Aliexpress (various suppliers).

PCB

Schematic

Board

Seeedstudio manufactured our board (2 layer and 1oz of copper).

Progress/Status

October 2017: PCB got produced and has been shipped.