BreadBoard Quality Criteria:

• insertion force for 0.025" square post headers
• removal force for 0.025" square post headers
• good conductivity with 26 AWG wire (even after square post insertions)
• consistency, do all contacts on the breadboard work equally well
• consistency, does each batch from the factory work equally well (even months or years apart)

To determine the quality of a solderless breadboard, a common test is to evaluate how well it works with square post headers. We have experienced breadboards where wires cannot be inserted or removed from the square post headers on a breadboard. We know how frustrating this can be when you just want the breadboard to work.

A good quality breadboard works well with thin and thick conductors and has a long contact life. Good quality breadboards will be usable with fine 26 AWG wires and large 0.025" square post headers. Quality testing is performed on all of our breadboards by inserting a smooth 0.025" post 50,000 times by machine and measuring the contact resistance. Quality contacts with the correct metal composition (phosphor bronze with plated nickel finish) will spring back, providing good contact force and conductivity, even after a large number of insertions.

Kit manufacturer customers switch to using BusBoard BB830 BreadBoards in their kits because they work reliably with square post headers. One customer tested 15 different brands of solderless breadboards to find one to include with his development board kits. They found that only two of the 15 brands could reliably use square post headers. They immediately implemented the BB830 in their kits due to the consistent quality and dependability found in our BreadBoards.

To learn more about BusBoard Prototype Systems’ Product differences, read the Geniune Differences post https://www.busboard.com/documents/BPS-GenuineDifferenceBreadBoards.pdf

Use solid core wire in the range of 22 to 26 AWG. This range provides good grip in the contact springs without putting excessive force on them. Very thin wire (28 AWG or finer) may not make reliable contact; wire that is too thick (20 AWG or heavier) can damage the contacts over time.

Pre-cut solid jumper wires such as ZipWire™ designed for breadboard use with machined pines are a convenient option and are available in a variety of lengths and colours . Use a colour-code system when you prototype to make circuits easier to debug. We like to use red for power, black for ground, and other colours for various signals.

Avoid stranded wire when prototyping on breadboards because the individual strands splay out and do not make reliable contact with the breadboard's spring clips. They can also break off inside the breadboard, causing intermittent faults that are difficult to trace.

Solderless breadboards are suited to low-frequency analog and digital circuits.

As a general guideline, reliable operation is typically limited to signals below 10 MHz. Above this, the parasitic capacitance and inductance of the contact springs and bare wires introduce noise, signal degradation, and unexpected behaviour.

General current guidelines allow for a maximum of 1 amp. Any current above this can cause voltage crops and excessive heat that can cause loss of spring tension and physical damage to the plastic housing.

For RF circuits, high-speed digital logic, or any application above 10 MHz, a soldered prototyping board or custom PCB is a better choice.

Yes, linking multiple breadboards together throughout your project can be helpful.

BPS full-length BreadBoards (BB830, BB1660, BB630, BB100R) can be used side-by-side using the interlocking dovetail connector on each end and half-length BreadBoards (BB400, BB300, BB50R) can be used side-by-side as well as top-and-bottom. This is a convenient way to expand your working area without rewiring.

There is also a modular breadboard product line (BB830M, BB400M, BB1460, BB1560M) that allows you to easily detach the power rails and circuit areas to snap different combinations together for your project needs.

Keep in mind that the power rails do not connect automatically when the boards are snapped together. The strips on each board are electrically independent. If you want a continuous power rail across multiple boards, add a short jumper wire bridging the rails at the join.

All BPS BreadBoards have adhesive tape pre-applied to the back, making it easy to mount them to any clean, flat surface: an enclosure panel, a piece of acrylic, or a wooden board. For a more rigid backing without committing to a permanent surface, use the included metal plate*- just peel the paper liner and press the breadboard to the plate.

For fixed installations, like the dash of a vehicle, a field enclosure, or a robotic arm, the metal plate accepts screws through its corners, giving you a secure, removable mounting option. Just make sure the surface is stable enough that your connections don't come loose under vibration.

*Metal plate is only included with the BB830, BB400, and the BB1600. The BB50R, BB100R, BB170s, BB300, and BB630 do not include a metal plate.

The BPS BreadBoards have adhesive tape on the back to attach them to your benchtop worksurface, pegboard, or enclosure. You can use the breadboard as-is.

To extend the use of your breadboard, prevent damage and punctures, we have included an optional metal plate to provide a permanent solid backing. Just peel off the paper liner and stick the breadboard to the metal plate.

On many breadboards each power rail is divided into two electrically separate halves at the midpoint of the board. BusBoard’s breadboards have a single continuous power strip on either side of the breadboard. Feedback from engineers over the years has indicated that the preference is to have a continuous power rail on their breadboards.

These are all prototyping platforms, each suited to a different stage of development or type of project.

Solderless BreadBoard (e.g., BPS BB830): No soldering required. Components and wires are inserted into spring contacts. Fully reusable. Best for experimenting, testing circuit ideas, and learning. Connections are temporary and can be removed for troubleshooting or new projects.

StripBoard (e.g., BPS ST1, ST2, ST3U): Stripboards are PCBs with long copper strips running in one direction. You solder components in place and cut strips to break connections where needed. Stripboards are more permanent than a solderless breadboard and good for compact, durable builds where you don't want to order a custom PCB.

PadBoard (e.g., BPS PAD1, PAD2): PadBoards are PCBs with a grid of individual solder pads, typically one per hole. With a PadBoard there are no pre-connected strips. All connections are made with point-to-point wiring or wire wrapping. PadBoards offer maximum flexibility, you're not constrained by strip orientation. PadBoards can be more time-consuming than StripBoards but suit irregular layouts and customization.

Solderable PC BreadBoard (e.g., BPS SB830, SB404, BR1): Solderable PC breadboards are PCBs that have the same hole pattern and power rail layout as BPS’s standard solderless breadboard. This allows you to transfer your proven breadboard circuit directly to the PCB using the same circuit and component layout. You can solder the circuit you designed and tested on the breadboard onto the Solderable PCB for a permanent, reliable result. The Solderable PC BreadBoard is a common next step for small batch and field testing, after designing and testing on the solderless breadboard.

This is more common than you might expect, and there are a few likely causes:

Cold or bridged solder joints. Inspect every joint under magnification. A good joint is smooth and shiny, and wets the pad fully. A cold joint looks dull or cracked. A solder bridge is a small blob connecting two adjacent pads. Both cause intermittent or hard faults.

Wrong component orientation. Diodes, electrolytic capacitors, transistors, and ICs are all polarity-sensitive. Double-check that each one is oriented correctly against your schematic.

Missed connections. On a solderable breadboard (SB830/SB400), the track layout is the same as your solderless board, so direct transfer is straightforward. On StripBoard or PadBoard, it's easy to miss a wire or solder a connection in the wrong location.

Power and ground continuity. Verify that power and ground reach every part of the circuit. A quick check with a multimeter in continuity mode before powering up will catch most wiring errors.

Parasitic effects that the breadboard was hiding. Occasionally a solderless breadboard circuit works despite intermittent contacts, then on a soldered board, these problems appear. Check that all IC inputs are tied to a defined logic level.

BPS prototyping PCBs are built on high-quality FR4 glass-epoxy material, which provides excellent electrical insulation. The practical working voltage limit depends on the spacing between copper traces on the board. The voltage rating for PCBs determines how much current it can safely carry without overheating. This rating depends on several factors for PCBs including the track width and hole spacing. The recommendations are for ideal use cases and need to be considered alongside other factors before a safe current rating can be achieved.

The maximum Amps should be derated by 50% to account for other components, wires, cables, enclosures, environmental, and other factors that increase temperature and restrict cooling airflow.

• For wide prototyping PCBs with 85mil tracks, (e.g. BR1, StripBoard STx, PR3U, PowerBoard) we recommend 3 Amps maximum to allow for a 10°C/18°F increase track temperature.
• For narrow prototyping PCBs, where the width narrows to to 40mils, (e.g. SB4, SB5, SB400, SB404, SB8300) we recommend 2 Amps maximum to allow for a 10°C/18°F increase.

See the BusBoard application note "BPS-AN0004 PCB Current Capacity.pdf" for more information on how to determine the current capacity rating for your prototype project.

If your project requires more current, cover the entire track with a solder bead to increase its thickness or use two or more tracks in parallel to allow for additional current. Adding tracks to the PCB does not increase current capacity at the same rate, as more heat is generated and airflow is possibly restricted.

The best way to cut a track is to cut through it in two places with a sharp knife and remove a copper section.

Caution!!! Use a good quality knife and don't press too hard to avoid breaking the blade.

Score many times lightly instead of pressing hard. Keep your fingers out of the cutting path. Angle the knife towards the center when cutting each side to make it lift. Test the resistance between the two sides with a multi-meter to ensure there is no copper sliver connecting them if the cut width is very narrow.

If the cuts are further apart, heat the section with a soldering iron tip to make the copper detach from the fiberglass base. The section of copper can then be more easily removed. For StripBoard and ProtoBoard, make the cuts at two adjacent holes and remove the 0.1” section between them to make the cutting easier.If the two cuts are close together, the copper will lift and you can scrape it off with the knife.

Pro-Tip: Color the cuts with a red marker to make them highly visible. This makes it easier to identify which track sections are no longer connected.

FR4 fibreglass board can be cut, but it requires the right technique because the fibreglass dust and fibres produced during cutting are an irritant.

Safety first: Work in a well-ventilated area. Wear eye protection and a dust mask rated for fine particles. Do not use power tools that generate large amounts of dust (table saws, rotary tools at high speed) unless you have adequate dust extraction.

The best methods for clean cuts:

• Score and snap: Use a sharp utility knife and a straight edge. Score the cut line firmly several times on both sides of the board, then snap along a hard edge. This works well for straight cuts and produces minimal dust.
• PCB shears or guillotine cutter: Gives clean, straight cuts with no dust and no blade wear. Ideal for repeated cuts.
• Hacksaw or fine-tooth hand saw: Clamp the board securely. Cut slowly.

After cutting, smooth and clean up any edge fibres with a fine file or light sandpaper. Check that no stray copper or fibreglass is bridging any traces near the cut edge.

BPS PCBs are lead-free and RoHS compliant, and can be soldered with either lead-free solder (e.g., SAC305 — tin/silver/copper) or traditional 60/40 or 63/37 tin/lead solder. The anti-tarnish coating on BPS copper makes soldering easy with either type.

For hobby and prototype work, 63/37 rosin-core solder in 0.6mm to 0.8mm diameter is a popular choice. It melts at a lower temperature and flows well, which is forgiving for beginners. Lead-free solder requires a slightly higher iron temperature (typically 350°C vs. 320°C) and benefits from quality flux.

Use a temperature-controlled iron and a fine chisel or conical tip for 0.1" pitch through-hole work.

BPS products follow the industry standard through-hole assembly practice. For single-sided BPS prototyping PCBs, components are inserted through the holes from the top (silkscreen/blank) side and soldered on the bottom (copper) side, which faces down.

For the solderable breadboard series (SB830, SB404, BR1, etc.), the silkscreen on the top side shows the row and column markings that match your solderless breadboard layout. Keep this side up when you are placing components.

For double-sided PCBs such as our PadBoards (PAD1, PAD2, PAD3U), StripBoards (ST1-D, ST2-D), and ProtoBoards (PR2H1-D, PR2H2-D, PR6H1-D, PR6H2-D, PR6H3-D), components can be soldered to either side, which is useful for compact layouts. If you are not sure which orientation to start with, begin with the side that has the square locator hole markers facing up, as these help with alignment.

BPS organises its prototyping PCBs around three standard sizes. Having a consistent size system means that PCBs, enclosures, and kits are designed to work together. You can swap between different PCB patterns and know the board will still fit your enclosure.

• Size1: 80 x 50 mm / 3.15 x 1.97 in
• Size2: 100 x 80 mm / 3.94 x 3.15 in
• Size3 (3U): 160 x 100 mm / 6.30 x 3.94 in

Size3 is a standard single-height (3U) Eurocard/VME form factor, which means it is compatible with off-the-shelf rack enclosures. Most BPS PCB patterns are available in all three sizes: StripBoard, PadBoard, ProtoBoard, BusBoard, PowerBoard, SMTpads, and SMTboard. The Solderable PC BreadBoard series uses its own dimensions to match standard solderless breadboard footprints.

For projects that don't fit within these three sizes, BPS offers a number of other PCB dimensions: from our small snappable BreadBoards to our oversized ST6U StripBoard.

Yes, with some differences to keep in mind. The SB830 Solderable PC BreadBoard is a popular alternative for projects that don't need the full 3U Eurocard (6.3 x 3.9 in / 160 x 100 mm) footprint of the POW3U.

The SB830 has six rails (three on each side), and its compact size (7.25 x 1.85 in / 184.2 x 47.0 mm) fits easily into smaller enclosures or alongside other boards.

The POW3U, by contrast, has interleaved power and ground rails distributed across the entire 160 x 100mm board. This makes power accessible at every circuit location without running long wires. It also accepts a 96-pin DIN-41612 connector for backplane or board-to-board applications, and fits standard 3U rack enclosures.

Choose the SB830 (or SB404 for even smaller builds) if you're making a compact, standalone circuit. Choose the POW3U if you need a larger work area with convenient power distribution, or if you're building into a 3U rack-format enclosure.

The BR1 and SB830 are both single-sided solderable PCBs designed to match the pattern of a standard 830 tie-point solderless breadboard. Both have the same 5-hole strip layout and 0.1” (2.54 mm) hold spacing as the BB830, so circuits transfer directly without recutting wires or repositioning components. They are similar PCBs and excellent choices for making permanent prototypes from full-size breadboards.

The BR1 is our original Solderable PC BreadBoard with a matching pattern to our BB830 Solderless BreadBoard. With input from customers, we developed the SB830.

The key differences are:

• Length: The SB830 is slightly longer than the BR1. The mounting holes are positioned further from the IC area, making it easier to secure the board in enclosures without screw heads interfering with components.
• Track width between holes: The SB830 uses narrower tracks between holes (40 mil vs. 85 mil on the BR1), making it easier to cut tracks cleanly and with less risk of leaving a copper sliver.
• Bonus pad pattern: On the SB830, the bonus pads at each end of the board use the same 2-hole strip pattern as the rest of the board. The BR1 uses a pad-per-hole pattern at the ends, which is less consistent with the rest of the layout.

Both boards have six power rails and the same rail spacing as the BB830, so power connections transfer directly. The BR1 is available for customers who know and rely on including it in their prototypes. The SB830 improves upon the BR1 and is easier to work with for most applications.

It depends on the type of flux. Most no-clean rosin flux (common in standard rosin-core solder) can be left in place for prototype use; it is non-conductive and non-corrosive once fully cooled. For a finished product or any circuit operating in a humid environment, cleaning is a good habit regardless.

Water-soluble flux must be cleaned off after soldering. If left on the board, it absorbs moisture and can cause corrosion and leakage currents.

To clean flux residue, use isopropyl alcohol (IPA) 90% or higher and a stiff brush (an old toothbrush works well). For stubborn residue, a dedicated flux remover/PCB cleaner is available from electronics suppliers. Always let the board dry fully before powering it up.