|
|
HowTo: Velleman K8055 & SSRs
( dave haberle)
Step 2 : Modify the Velleman K8055 board
|
| | The K8055 USB experimenter board has 8 digital status LEDs labeled LD1-LD8. Immediately to the left of each LED is a 1K ohm resistor; at the front (left) side of each resistor are the words Out1-Out8 for each of the digital channels. At the left side of the resistor 4.7 vdc is available on each channel; on the right side, 1.89 vdc. Tapping the + voltage at the left side of the resistor on the top side of the board is easy with Cat-5 wire. Simply trim no more than ¼” of insulation off the wire and make a small hook-shaped loop. Hook it under the exposed resistor lead, squeeze it gently with a small needle nose plier and solder it into place. The beauty of this easy modification is that it doesn’t change the intrinsic properties of the K8055 board in any way and you can always un-do it simply by unsoldering the wires from the resistor leads.
|
|
|
