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Learn proper techniques for inserting, wiring, and using 100-102 yellow test pins for circuit diagnostics and prototyping. Compare specs, troubleshooting tips, and local sourcing at Communica.
Understand what 100-102 yellow test pins are and their role in breadboarding and debugging.
Step-by-step insertion, wiring, and measurement advice for student and professional builds.
Find 100-102 style test pins at Communica with fast SA delivery and VAT invoicing.
100-102 yellow test pins are a popular prototyping and diagnostic accessory, commonly used by students, makers, and engineers in South Africa. These slender, bright-coloured metal pins are designed for quick insertion into breadboards or solderless point test access on PCBs, allowing for reliable oscilloscope and multimeter connections or jumper leads during circuit development. They are frequently found in educational labs, repair benches, and production test jigs.
Most 100-102 test pins feature a 0.6mm diameter tinned brass shaft approximately 20-25mm in length with a distinctive insulated yellow "top hat" grip. The yellow colour aids in rapid identification amongst dense wiring. These pins are compatible with standard 2.54mm (0.1") pitch breadboards and prototyping PCBs, making them highly versatile for design and debug work.
| Parameter | Typical Value | Comment |
|---|---|---|
| Shaft Diameter | 0.6 mm | Fits common hole sizes; snug in breadboards |
| Length | ~24 mm | Exposed tip simplifies clip connection |
| Colour | Yellow head | Quick identification |
| Material | Tinned brass | Good conductivity |
100-102 yellow test pins are essential in these scenarios:
They are especially helpful in tertiary education labs and for South African technicians needing to diagnose complex assemblies without risking PCB trace lifts or broken solder joints.
For example, a project using a temperature sensor and microcontroller will often break out critical I2C or analog pins using 100-102 yellow test pins. This enables easy measurement of signal waveforms or convenient connection of logic analysers, supporting rapid troubleshooting and student assessment in practicals.
+5V ----[100-102 Pin]----> Test Access Point ----[Load/Signal]
This approach is standard for providing safe contact points during finals checking or before final PCB assembly, helping avoid short circuits from wandering multimeter tips.
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Review for Communica Samrand Security Wanted to share a heartfelt thank you to the security team at Communica Samrand! Yesterday, I had a personal ex...
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Verified customerNicolene
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Verified customerGood Array of products and sound advice
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Currently have only purchased items from their on-line store. Received what I ordered plus quick delivery. No complaints to date.
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Verified customerNicole was very helpfull and friendly.
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Verified customerExcellent service Nicole
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Verified customerGreat for your electronic needs - Prices are a bit expensive
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Verified customerDefinitely will have what you're looking for.
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Verified customerCommunica supplies semiconductors and electronic components to industries such as automotive, electrical, automation, mining, and education.
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