|Item model number||FBA_pcb board|
|Item Weight||4.2 ounces|
|Product Dimensions||5.1 x 2 x 0.8 inches|
|Item Dimensions L x W x H||5.12 x 1.97 x 0.79 inches|
JBtek 8 Channel DC 5V Relay Module for Arduino Raspberry Pi DSP AVR PIC ARM
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- 5V 8-Channel Relay interface board, and each one needs 15-20mA Driver Current
- Equiped with high-current relay, AC250V 10A ; DC30V 10A
- Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic)
- Indication LED's for Relay output status
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JBtek DC 5V 8 Channel Relay interface board. Use it to control various appliances, and other equipments with large current. It can be controlled directly by Microcontroller(Arduino , Raspberry Pi, 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic).
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- GND - Pi ground
- VCC - Pi 3.3v
- 1-8 - Pi GPIO outputs
- JD-VCC - 5 volts in for relay power
- GND - relay ground (this is tied to GND on the main header as well)
- VCC - 3.3v in/out (this is tied to VCC on the main header and carries 3.3v to power the logic circuits).
The only thing you might dislike is that the power and negative are pins instead of screw on connectors. Very minor though, as I bought the female to female jumpers to connect to the GPIO pins on the Raspberry Pi.
When I started using it in my projects several months ago (unfortunately, so I cannot try to get refund), I found out that 2 out of 8 releys are not working! The red light is turning on but reley never switches the state for those 2 releys! The other 6 works fine. This is a crap, very disappointed. Now I have to buy new module and wait for it to be shipped!.
After spending some time on debugging the board (i.e testing resistors and transistors), I tried adding more solder in soldering joints / add heat for non working releys, which fixed the issue. So apparently soldering was poor!. Hope this might be helpful for others who is in similar situation!
I've been using this array to control AC electroluminescent (EL) wires, and they work well. They are a bit noisy, but the relay clacking sound effects are what I want for the project. So far, I've only tested the relays with a 100ms delay, and they work fine. Since they are mechanical, I assume that there is some top speed. If you want to do 5ms switching, odds are you should get a board with TRIACs like the Sparkfun EL Sequencer or roll your own.
As an aside, I received it in just two days. Excellent turnaround time. It would have been nice to have the schematic, but I found it on the Amazon Web site.
from Raspberry Pi:
- GND: GND
- IN1-8: GPIOs
- VCC: 3.3V
from a 5V power supply (a 5V/1A or 5V/2A USB charger in my case):
- GND: GND
- JD-VCC: 5V
Make sure you have 10 M-F jumper cables if you're connecting to a breadboard (8 relays, 1 +5vdc, 1 gnd)
Also - this is an unmounted PC board. Make sure you do not leave anything conductive under it. (a sheet of paper is fine while experimenting, but you'll want to mount this properly before running current through the business end of the relays!)
Most recent customer reviews
The side jumper (external power) threw me off for a bit when wiring it up.Read more