If you don't want to install the LED indicators, that is just fine, the board was designed to accommodate that wish.
However, you do still need to install the resistors; BUT they need to go in different holes and have a different resistance value.
You will need to use a 680 ohm resistor instead of the 220 ohm resistor.
You would install this resistor with one lead in the top most resistor hole and then have it span the space down to the bottom most LED mounting hole.
== How to use LEDs of many colors for the Channel Indicators ==
'''Using other colors than red for the channel indicator'''<br><br>
The board was designed and silkscreened to use a 220 ohm resistor and red LED for the the channel indicator.
However, other colors can be used.
Red LEDs have a typical forward voltage (Vf) of 2.0 volts. However, other colors, like green, have a Vf of 3.x volts. Therefore, if you use a LED with a Vf in this range, you should replace the 220 ohm resistor connected to that LED with a 180 ohm resistor.
The basic equation is:
<br>
R = [V(supply) - Vf(opto) - Vf(LED) - Vol]/0.005
<br>
V(supply): Supply voltage, in our case 5V
<br>
Vf(opto): Forward voltage of the opto emitter, 1.5V max, 1.15 typ
<br>
Vf(LED): Forward voltage of the LED, for the LEDs I use it is 2.0V
<br>
Vol: Low voltage output level, For the purposes of this calculation, a value of 0.33V max, 0.18V typical was used.
<br><br>
So R = [5 - 1.5 - 2.0 - 0.33]/0.005 = 234 ohms or the next lower standard value is 220 ohms
<br><br>
This doesn't take into account the tolerances of the resistor but given the worst case values for the opto emitter and Vol this shouldn't matter.
<br>
So if we look at the typical case the current draw would be:
<br>
I = [5 - 1.15 - 2.05 - 0.18]/220 = 7.36 mA.
<br>
This is about 50% more current than the desired 5 mA but the SSR is guaranteed to fire even under the worst case.
<br>
If you are concerned about the current draw then you can increase the value of R based on the typical values (i.e. to either 270 or 300). However, there is a concern that with the temperature extremes these devices are used in, this would push them closer to the max values and cause erratic behavior.
== Construction Information ==
There are several 'how to build a PCB' self help guides both within this wiki and the web.
Here is a picture of a completed SSRneon-G2: (The fuse cover has been removed)
[[Image:SSRneon_G2_LED_smaller.jpg]]
== Wiring The SSRneon ==
The pin-out for the RJ-45 network cable is the same for all of the Sean Bowf derivative SSRs:<br><br>
View looking down on the component side of the PCB:
The following image shows how to connect wires to the SSRneon-G2-LED.
The AC line connects to the far left hand terminal block labeled: ''AC INPUT''
The other four terminal blocks are for the wires that will connect to your lights.
The connector labeled: ''HOT'' is for the 'hot' wire.
The connector labeled: ''NEU'' is for the 'neutral' wire.
Your network interface cable clicks into the RJ45 connector on the top right of the board.
If all is well, you should see both neon bulbs glowing signaling AC voltage is present and flowing through the fuse. The LED should also be lit to indicate that 5 volts DC is being supplied by the lighting controller.
[[Image:Ssrneong2led.jpg|left|Version G2]]
[[Category:SSRez]]
[[Category:SSR]]
[[Category:DIYC Index]]
Revision as of 01:13, 10 January 2015
Version G2
A Constant Current Driver Board for 10W RGB Modules
This circuit board is specifically designed to drive 10W RGB LED modules.
It has the ability to drive a 10W RGB LED via a 5v DC PWM signal that will therefore allow
dimming of each individual color.
As a separate 12V power source is applied to the board, three different connections are made to the board that can
control the brightness of each color separately.
These connections are typically the 5V DC output pins from a microcontroller.
10W RGB LED
small
This board was specifically designed for a commonly found 10W RGB LED.
These square form factor LEDs can be found at many online stores, ebay and aliexpress.
Typically characteristics of these LEDs would be:
Color: RGB
DC Forward Voltage (VF): Red 6-8V, Green 9-12V, Blue 9-12V
DC Forward current (IF): 300MA
Output Lumens: Red 120-150LM, Green 200-300LM, Blue 70-100LM
Wave Length : Red 620-625nm , Green 515-520nm, Blue 455-460nm
Beam Angel: 140 degrees
Life span: >50,000 hours
As you can see from the picture to the right, these LEDs are not very large,
less than 1" square.
All three colors have a common Anode (+), and separate Cathodes (-) for each color.
Despite their size, do not be fooled into thinking these are like regular indicator LEDs that you see on circuit boards.
These units can generate enough heat to burn themselves out if not attached to a heatsink.
BOM - Bill of Materials
The BOM for this board uses both Surface mount(smd) and through-hole components.
The only mandatory smd part is the constant current driver IC, the PT4115.
The board can use either through-hole or smd inductors.
