Does this work with a particle photon?

I found that the series 3 denuralizer’s photon emitter is phased incorrectly being effected by the relay fly back current, thus under the wave particle duality presumption the photons are not behaving in a sinusoidal manner. Try using 7v for supply voltage.

what does the jumper do?

You can remove the jumper to provide a different power supply (JD-VCC) to the relay actuation circuit from the one used by the host controller and to the LED side of the optocouplers. According to the relay spec, the nominal current draw is 71mA, and if for a 8 relay board that would be 568mA, and if you turn on all 8 relays simultaneously, you'll need 2-3 time more to achieve the latency.

Just purchased one of these. Can I hook it directly to the Raspberry Pi or do I need to use a Mosfet or Opto Isolator?

Based on the picture, this 2 relay shield already has opto isolators for both relays (that is what the two 4 pin modules are). Raspberry Pi uses 3.3V and this uses 5V, so you may want to use a level shifter (or an NPN transistor with two resistors) to keep from overloading the Pi output.

Is this a mechanical relay or an SSR? I am looking for something that will not make an audible sound when switching, and can provide very fast respons

It's a mechanical relay and makes a click, but it is not very loud. There are ssr "relays" available. Make sure to use a good heat sink if you need to switch any real current.

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SunFounder 5V 8 Channel Relay Shield Module for Arduino R3 2560 1280 ARM PIC AVR STM32 Raspberry Pi 3, 2 Model B & B+

SunFounder 5V 8 Channel Relay Shield Module for Arduino R3 2560 1280 ARM PIC AVR STM32 Raspberry Pi 3, 2 Model B & B+

Product ID: 7893719

Details

Brand
SunFounder
Connector Type
Plug-In
Current Rating
10 Amps
Mounting Type
PCB Mount
Operation Mode
Automatic

⚡10A high-current relay

💡LED status indicators

🔌5V standard microcontroller interface

₨421

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Description

🔗 Empower Your IoT Projects with Reliable Relay Control!

REAL TIME STATUS LE DS - Visual relay output feedback keeps you in control and informed at a glance.
COMPACT PCB MOUNT READY - Sleek 14cm x 5.7cm design fits perfectly into your workspace without clutter.
TRUSTED BY PROS MAKERS ALIKE - Top-rated with 4.6 stars and thousands of users powering smart automation projects worldwide.
POWER UP WITH 10 A HIGH CURRENT RELAYS - Control heavy-duty appliances effortlessly with AC250V/10A or DC30V/10A capacity.
PLUG PLAY MICROCONTROLLER COMPATIBILITY - Seamlessly integrates with Arduino, Raspberry Pi, ARM, PIC, and more for instant project upgrades.

The SunFounder 5V 8-Channel Relay Shield is a compact, high-current relay board designed for seamless integration with popular microcontrollers like Arduino and Raspberry Pi. Supporting up to 10A switching capacity per channel, it enables precise control of heavy appliances and equipment. Featuring LED indicators for real-time status and a standard plug-in interface, this module is a must-have for professionals and makers aiming to elevate their automation and IoT projects.

Specifications

ASIN	B00DR9SE4A
Best Sellers Rank	#43,418 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #63 in Single Board Computers (Computers & Accessories) #695 in Industrial Electrical Controls & Indicators
Brand Name	SunFounder
Coil Voltage	5 Volts
Connector Type	Plug-In
Contact Current Rating	10 Amps
Current Rating	10 Amps
Customer Reviews	4.6 4.6 out of 5 stars (1,296)
Item Weight	0.02 Pounds
Manufacturer	SunFounder
Maximum Switching Current	10 Amps
Minimum Switching Voltage	5 Volts
Model	8C-5V
Mounting Type	PCB Mount
Operation Mode	Automatic
Part Number	8C-5V
Specification Met	Ce, Rohs, and Other Relevant Electrical Performance, Safety, and Environmental Standards
UPC	520141420814
Unit Count	1.0 Count
Warranty Description	1 Month
Wattage	50 watts

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