High quality relays of 15A max switching current Built-in LED indicator for each relay Optional I2C address through switch combinations Raspberry Pi compatible Relay screws for firm connection
- 10+: $21.50
When carrying heavy Inductive load for a period of time, the on-board MCU might be down and a reset procedure is needed.
The Relay Shield utilizes four high quality relays and provides NO/NC interfaces that control the load of high current. Which means it could be a nice solution for controlling devices that couldn’t be directly controlled by IIC bus. Standardized shield form factor enables smoothly connection with the Raspberry Pi . The shield also has four dynamic indicators show the on/off state of each relay.
Raspberry Pi compatible
Interface:IIC , Three hardware SW1 (1, 2, 3) select the fixed I2C-bus address
Relay screw terminals
Standardized shield shape and design
LED working status indicators for each relay
COM, NO (Normally Open), and NC (Normally Closed) relay pins for each relay
High quality relays
Working status indicators for each relay
Compatible:Raspberry Pi ; Other main board via jumpers;
Power supply:4.75~5.5V ;
Max Switching Voltage:30VDC/250VAC;
Max Switching Current:15A ;
Dimensions:91.20 * 56.15*32mm;
|130mm x60mm x32mm
LEARN AND DOCUMENTS
SHARED BY USERS
Easy to use using PythonPlus:
I use this board with Python to control it. The example code worked fine to integrate into my own project.
Only the small header is soldered to the board. That should be fixed.
Also you should have the possibility to apply extra power as the relais can take some current when all are in use.
What could be better?
The I2C could be used to control more outputs. I'd appreciate if the remaining outputs would be accessible via optocoupler.
Would not recommendCircuit lacks any form of power supply bypass-capacitors at both the +5V and +3V3 rails, causing trouble when driving multiple relays with semi-inductive loads at the same time. I used this to switch a contactor and multiple solenoid valves but nearly every switch-cycle the IO-expander became unreachable on it's I2C interface (used power supply = 5A max). I've bodged on some 1uF capacitors and since then it worked flawless. Also, the dimensions of this board are based on a Pi 1 B, it will not fit in casing for a Pi 2 or 3. I also doubt how 'high quality' these Chinese unobtainable relays really are. 1/5 stars, would not recommend this board to anyone.