ShillehTek 840-Piece Jumper Wire Manual

Overview

This is the workshop-scale jumper kit: 840 pre-formed U-shape breadboard wires in a compartmented storage box. Fourteen lengths, sixty of each — enough to wire an entire semester of projects, a classroom bench, or that one glorious mega-breadboard build without ever cannibalizing wires from a previous circuit.

Like all U-shape jumpers, they are solid-core wires bent to exact 2.54 mm breadboard spans with pre-stripped, right-angle legs. They sit flat against the board, color-coded by length, making circuits dramatically cleaner than a tangle of long flexible dupont leads. Use them with Arduino, ESP32, Raspberry Pi, Pico — anything that lands on a solderless breadboard.

At a Glance

Piece Count

840

Lengths

14 sizes x 60

Style

Rigid U-shape, lies flat

Wire

Solid core, tinned

Storage

Compartmented box

Pitch

2.54 mm breadboards

Specifications

Parameter	Value
Quantity	840 pieces (14 lengths x 60 each)
Wire Type	Solid-core, tinned copper
Gauge	~22 AWG class (standard breadboard fit)
Span Range	2-hole hops (~5 mm) up to long rail bridges (~125 mm)
Color Convention	Color indicates length (not signal function)
Compatible Sockets	Solderless breadboards and 2.54 mm female headers
Current Handling	Signal and low-power duty; keep sustained runs under ~1 A
Storage Box	Hinged, one compartment per length

How to Use

The kit is the wiring itself — here's how to get the most out of a box this deep:

Keep the box sorted — it's the whole point

Each compartment holds one length. Return jumpers to their slot when you tear down a circuit and the kit stays instantly usable for years; dump them loose once and you own 840-piece confetti. The compartment order matches length order, so "two slots up" always means "two holes longer".

Wire in layers

Lay power and ground first along the rails with short taps, then bus lines (I2C, SPI) as flat parallel runs, then per-component hops. With sixty of each length you never need to "make do" with a wrong-size wire that bows over the board.

Combine with dupont leads deliberately

U-jumpers own everything that stays on the board; flexible dupont wires handle off-board runs to sensors, displays, and dev boards on their own headers. That split keeps the flat layer readable underneath the few tall wires.

Tip: For classrooms and team benches: issue each station a starter strip of every length rather than passing the whole box around. The kit's depth (60 per size) exists exactly so stations can be stocked without exhausting any one length.

Note: Straighten any bent leg with flat pliers before insertion. A splayed leg can stretch a breadboard's spring clip, and that hole then grips every future wire loosely.

Frequently Asked Questions

What's the difference between this and the 140-piece kit?

Same wire style and lengths — just six times the depth (60 of each length instead of 10) plus the storage box. Get this one if you run multiple simultaneous projects, teach, or hate running out of the one length you need.

Do these work with female dupont headers too?

Yes — the legs are standard 2.54 mm male pins, so they plug into female headers on modules and dev boards. They're rigid, though, so only do this where the geometry genuinely lines up.

How much current is safe through one jumper?

Keep sustained current under ~1 A per path — the limit is the breadboard clip, not the wire. Split high-draw rails across multiple taps, and keep motor or heater current off the breadboard entirely.

Why do colors repeat across different lengths?

With 14 lengths and a limited palette, some colors recur on visibly different sizes. Length is still unambiguous — count holes or compare against the compartment — and the near-length colors are kept distinct.

Are they reusable?

Extensively — solid-core legs survive hundreds of insertions if you push and pull straight. Retire any wire whose legs have gone dull, kinked, or springless; with 60 per size, you can afford to be ruthless.

Can I cut and re-bend them into custom lengths?

You can — it's ordinary solid wire — but custom shapes are better made from bulk 22 AWG spool wire, keeping the kit's counted lengths intact for their real job: instant, exact-span links.

Documentation

840-Piece Breadboard Jumper Wire Kit with Storage Box for Arduino, Raspberry Pi & ESP32 | ShillehTek Product Manual