Workbench Wisdom: Practical Tips from Experts

Building better circuits often comes down to simple habits at the workbench. Four contributors share lessons learned through years of practical electronics.

Good projects are rarely the result of one brilliant idea alone. They come from small habits repeated at the workbench: checking before powering up, choosing the right tool, documenting what changed, and knowing when to stop staring at a fault and come back later. For this edition, four contributors share practical workshop tips gathered from years of building, repairing, testing, and learning from real circuits.

Jan Ückerseifer (Germany, DJ1UC)

Replace High-Pin-Count ICs with a Knife

When a damaged IC has many pins, such as a microcontroller, removing it with hot air can put nearby components at risk. One practical alternative is to use a sharp utility knife to carefully cut the pins before removing the package. This avoids having to thermally shield surrounding parts such as bypass capacitors with polyimide tape. Once the body is removed, the remaining pins can be cleaned from the pads with a soldering iron and wick.

Ückerseifer bench — Cutting the pins of a damaged high-pin-count IC can make removal safer when nearby
components would be difficult to protect from hot air. (Source: J. Ückerseifer)

Remove Two-Terminal SMD Parts with a Gas Soldering Iron

Small two-terminal SMD components can be removed easily by heating both ends. Instead of using two soldering stations, a compact gas soldering iron can provide the second heat source. These tools are often not much larger than a pen and can be convenient for quick rework.

Consider Ceramic Resonators

For some microcontroller, ADC, and general clock-source applications, ceramic resonators can be a useful alternative to quartz crystals. They are often smaller and usually do not require the two external load capacitors needed by many crystal circuits. Accuracy requirements still matter, of course, but where the tolerance is acceptable, the simpler footprint can be useful.

Use a Hot Plate for Dense IC Soldering

A hot plate can make soldering ICs with many pins much quicker than working pin by pin. In some cases, reaching around 225°C takes less than a minute, and low-cost hot plates are now widely available online. For suitable boards, this can be a fast and inexpensive alternative to more elaborate reflow setups.

Track Temperature-Related Faults with Cooling Spray

Cooling spray can help locate temperature-sensitive faults on a PCB. It is not electrically conductive, so it can be applied selectively to suspect components while the circuit is operating. For example, spraying a faulty or overloaded voltage regulator may reveal the problem through rapid evaporation or a change in circuit behaviour.

Use a Hemostat for Through-Hole Rework

An artery clamp, or hemostat, is useful when removing through-hole parts such as resistors or electrolytic capacitors. Clamp it to the component, turn the PCB over, and heat the solder joints. The weight of the clamp helps pull the component free once the solder melts.

David Ashton (Australia)

Put the Breadboard in a Box

A bare breadboard sliding around the bench can quickly become a source of bad connections, broken jumpers, and mild rage. A more robust approach is to mount the breadboard in a case with built-in power supplies and useful front-panel connections.

One long-serving example used ±12 V and ±5 V rails. After decades in storage, it developed a loud hum, smell, and heat due to old tantalum capacitors in the power supply going short — a common failure mode in older electronics. After repair, it carried on working.

Ashton beardboard box — Self-contained breadboard development box built into a repurposed biscuit box,
with a breadboard, 4-mm sockets, and an internal router power supply. (Source: D. Ashton)

Other versions can be built into whatever enclosure is available: an old modem case, a biscuit tin, or any suitable box that can hold a breadboard, power supply, switches, LEDs, a speaker, and low-frequency square-wave sources.

Limit the Current on Breadboard Rails

Use low-current regulator options for normal breadboard power rails. The 78L and 79L series regulators, for example, limit current to around 100 mA, which can help prevent overheated ICs from damaging the breadboard. If more current is needed, add separate higher-current rails using 78M/79M or standard 78xx/79xx regulators.

Make Connections Easy

For power and signal delivery to the breadboard, standard screw terminals work, but spring-loaded speaker terminals or push-button terminal blocks are often more convenient. They avoid the constant hunt for a screwdriver and make quick changes less irritating.

Make Your Own Breadboard Jumpers

Ready-made breadboard jumper kits are useful, but solid-core Cat 5 or Cat 6 cable is also excellent material for custom jumpers. Strip the cable and cut wires to the exact lengths needed. It keeps the layout neater and reduces long jumper loops that get pulled loose.

Stefan Nikolaj (Germany)

Use Modern Modules as Test Equipment

Evaluation kits and community-made modules can often stand in for traditional test equipment, especially when the requirements are known. For one RF project, five known-frequency signals were needed, but five signal generators were not available. A set of inexpensive RF generator modules, a Raspberry Pi Pico, and a MicroPython program produced a flexible DIY signal-generator box in an afternoon.

The same idea applies to power supplies, electronic loads, logic analysers, programmers, SWD/UART probes, and other tools. With a simple enclosure, 3D-printed front panel, and clear labels, a small module-based tool can feel surprisingly close to a headless bench instrument.

Nikolaj boards — Custom perfboard driver/control board mounted on a 3D-printed platform, shown beside a small ready-made
driver module for comparison or integration. (Source: S. Nikolaj)

Invest in Storage Earlier Than You Think

A parts storage system pays for itself faster than expected. It can start with a label printer, parts drawers, and cable organisers. A more advanced setup might use InvenTree software with a compatible label printer to track parts properly.

The benefit is not only neatness. Avoiding duplicate orders, finding parts you already own, and reducing bench clutter can save more time and money than the storage system costs.

Try Different Lead-Free Solders

Leaded solder is relatively predictable, but lead-free solder is a broad category. Some types are difficult to use and deserve their poor reputation; others can work extremely well. Cheap lead-free solder can be much worse than cheap leaded solder, which is one reason many people have bad early experiences with it.

Buy small sample vials from different manufacturers and try them under real bench conditions. The right alloy and flux combination can make a major difference. For me, Sn100Ni+ works better than any leaded solder I have used, while several other rolls were shelved because they did not perform well.

Read Old Service Manuals

Service manuals for older test equipment, synthesizers, and other electronic systems are excellent educational resources. They often explain not only what the circuit does, but why it was designed that way.

They also show system-level thinking: front-panel inputs, rear-panel power, service access, test points, mechanical constraints, and the relationship between the PCB and the enclosure. These are lessons that tutorials often skip, but real products depend on them.

Bera Somnath (India)

Build Early, Then Learn from the Build

Some projects work almost immediately, while others go through redesigns, failures, and unexpected discoveries. Those development phases should not be seen only as corrections. Each one can become a project in its own right, with useful ideas emerging from problems that were not part of the original plan.

For small microcontroller designs, a solderless breadboard is often the fastest starting point. Larger projects involving displays, motors, servos, speakers, or power electronics usually move quickly to double-sided prototyping PCB. In both cases, an early rough version helps reveal what the circuit really needs.

Keep the Essential Bench Tools Close

A useful everyday bench setup does not need to be exotic. A digital multimeter, wire cutter, tweezers, illuminated magnifier, temperature-controlled soldering iron with a fine tip, quality hookup wire, 2.54-mm connectors, double-sided prototyping PCBs, and Schottky diodes cover a lot of ground. The multimeter is often used simply for continuity checks, while the magnifier catches small solder bridges before they become mysterious faults.

Somnath automator-lidar — Automator lidar (Source: B. Somnath)

Protect Against Power Mistakes

Power-related mistakes are among the most expensive. When external motor or driver supplies are involved, add a Schottky diode for reverse-polarity protection where appropriate. Also keep only the required power supply on the bench during testing. Accidentally applying 12 V to a 5 V circuit can destroy hours of work instantly. Before first power-up, inspect every solder joint under magnification. Then check the power rails for shorts and verify that different supply lines are not accidentally connected together. This simple habit can save an entire board.

Step Away from the Roadblock

Every project reaches a point where progress seems impossible. The bench is messy, the circuit looks hopeless, and the problem refuses to move. Sometimes the best next step is to stop. A short break, walk, or nap can let the answer surface without forcing it. Engineering is not only about tools and measurements. It is also about how each person observes, thinks, experiments, and returns to a problem with a fresh view.

Editor's Note: This article appears in Elektor September/October 2026.

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