Introduction: IOT123 - ICOS PANEL CIRCUIT TESTER
In developing the ICOS10 ASSIMILATE SENSOR HUB, I needed to verify the panel circuits as they were made. Also as the pins were being soldered on the 3P headers, I wanted a 3P male pins inserted in them to stop any deformation during soldering. Also key to this design: I had already developed a circuit tester for the 6 wire IDC cables.
Okay the constraints were:
- Used in conjunction with the HEADER JIG during soldering on the panels.
- Used after full assembly of the ICOS10 if needed.
- Reuse the IDC CABLE TESTER.
- Be able to run the continuity and isolation tests.
The approach I took was:
- Have a simple IDC 6 wire cable from the IDC HEADER installed on the panel to one header on the IDC CABLE TESTER.
- Use a 1" Double sided protoboard to breakout 6 male pins, fitting the ASSIMILATE SENSOR BREAKOUT, and not obstructing use of the HEADER JIG. Also on the board is another IDC HEADER.
- Have a simple IDC 6 wire cable from the header on the protoboard to the other header on the IDC CABLE TESTER.
Step 1: Materials and Tools
1" Double sided protoboard (1)
6 Wire Ribbon Cable (~60cm)
6 Pin Shrouded IDC Male Header (1)
IDC-6 Socket 2×3 Pins Connector (4)
Male Header (3P, 3P, 1P, 1P)
Hookup wire (~7)
Solder and Iron (1)
Wire Cutters (1)
Step 2: Preparing the Cables
There will be 2 cables created, using the same steps:
- Cut 30cm of 6 wire ribbon cable.
- Line up blue wire with arrow.
- Loop the ribbon to the other side of the Middle part of the Socket.
- Link the strain relief part into the other parts of the Socket.
- Tighten slack out of ribbon and tighten Piercing part onto ribbon with fingers.
- Place Socket in vice and tighten till all pieces fully compacted.
Step 3: Prepare the Protoboard
- On the top, insert 1P Male Headers (1)(2) and 3P Male Headers (3)(4), and solder on bottom.
- On the top, cut the pins on 1P Male Headers (1)(2) off at the plastic collar; these are used for spacers.
- On the bottom, insert IDC Headers (5) with key to outside, and solder on top.
- On the top, trace a white wire from WHITE1 to WHITE2 and solder.
- On the top, trace a yellow wire from YELLOW1 to YELLOW2 and solder.
- On the top, trace a red wire from RED1 to RED2 and solder.
- On the top, trace a black wire from BLACK1 to BLACK2 and solder.
- On the top, trace a green wire from GREEN1 to GREEN2 and solder.
- On the top, trace a blue wire from BLUE1 to BLUE2 and solder.
Step 4: Next Steps
As stated in the constraints, we have the following scenarios:
DURING SOLDERING
Photos above after hot glue, but more sense to test after solder and before hot glue.
- Assemble Header Jig parts as per instructions.
- Attach 1" PCB Test Unit to 3P Headers on underside.
- Continue steps to and including soldering the IDC Header.
- Attach first IDC cable from Panel IDC Socket to first IDC CABLE TESTER IDC Socket.
- Attach second IDC cable from 1" PCB Test Unit IDC Socket to second IDC CABLE TESTER IDC Socket.
- Power up IDC CABLE TESTER with 5V Micro USB.
- Turn SPDT on.
- For continuity testing, leave all DIP Switches on, and all LEDS should glow.
- For isolation testing, alternate off and on, and alternate LEDS should glow.
AFTER ASSEMBLY
- Attach 1" PCB Test Unit to 3P Headers on outside of shell.
- Attach first IDC cable from inside Panel IDC Socket to first IDC CABLE TESTER IDC Socket.
- Attach second IDC cable from 1" PCB Test Unit IDC Socket outside to second IDC CABLE TESTER IDC Socket.
- Power up IDC CABLE TESTER with 5V Micro USB.
- Turn SPDT on.
- For continuity testing, leave all DIP Switches on, and all LEDS should glow.
- For isolation testing, alternate off and on, and alternate LEDS should glow.
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