Overview
This kit is a complete solderless prototyping bench in one bag: a full-size 830-point breadboard, an MB102-style plug-on power supply module, and 140 U-shape jumper wires. It's everything you need to build and power circuits around Arduino, ESP32, Raspberry Pi, or Pico — no soldering iron required.
The 830-point board gives you 630 component tie points plus four full-length power rails. The MB102 module snaps onto the rail end and turns a barrel-jack adapter or USB source into clean 3.3V or 5V on each rail, selected per side with jumpers — which means you can run 5V logic and 3.3V sensors on the same board at the same time.
At a Glance
Breadboard
830 tie points
Power Module
MB102, 3.3V / 5V
Input
6.5-12V jack or USB
Rail Selection
Per-rail jumpers
Jumpers Included
140 U-shape
Specifications
| Parameter |
Value |
| Breadboard |
830 points: 630-point terminal strip + 200-point power rails |
| Center Gap |
Standard DIP spacing — ICs straddle the middle channel |
| Power Module |
MB102-compatible, plugs onto the rail end |
| Module Input |
6.5-12V DC barrel jack, or USB 5V |
| Module Outputs |
3.3V or 5V per rail (independent jumper per side), plus header pins |
| Module Current |
Up to ~700 mA total (regulator-limited; less at high input voltage) |
| Controls |
On/off button with power LED |
| Jumper Wires |
140-piece U-shape kit, 14 lengths, ~22 AWG solid core |
| Accepted Wire/Leads |
~21-26 AWG component legs and wire |
How to Use
1. Know the board's internal connections
Each 5-hole row (a-e, f-j) is one node; the center gap splits the two halves so DIP chips can straddle it. The long rails run the board's length — but on many 830 boards each rail is split at the middle, so bridge the halves with a jumper if you want one continuous rail. Check yours with a multimeter once and you'll never be surprised again.
2. Set up the MB102 power module
Snap the module onto the end of the board so its output pins land in the rails, feed it 6.5-12V through the barrel jack (a 9V adapter is the sweet spot) or 5V via USB, and set each side's jumper to 5V, 3.3V, or OFF. Press the button; the LED confirms power. Mixed-voltage builds are the killer feature: 5V rail for an Arduino side, 3.3V rail for ESP32/Pi-friendly sensors.
3. Build in layers
Rails first (use the included short U-jumpers to tap rows), buses next, components last. Keep ICs aligned over the gap, orient all electrolytics and diodes the same visual way, and your board stays debuggable.
Warning: Don't feed the MB102's barrel jack and USB at the same time, and don't backfeed a rail that a dev board's own USB is also powering — pick one 5V source per rail. When a rail is jumpered to 3.3V, double-check before plugging in 5V-only modules, and vice versa.
Note: The MB102's ~700 mA budget covers logic, sensors, LEDs, and small servos' idle — not motors, pumps, or LED strips. Those get their own supply, with grounds tied to the breadboard's ground rail.
Tip: Add a 100 µF electrolytic plus 0.1 µF ceramic across each powered rail near your circuit. Breadboard rails are long antennas; a little decoupling saves hours of "why does my sensor glitch" debugging.
Frequently Asked Questions
Can the power module run both rails at different voltages?
Yes — each side has its own jumper, so one rail at 5V and the other at 3.3V is the classic setup for mixed-logic projects. Set a jumper to OFF to disable that rail entirely.
Why does my circuit lose power halfway down the rail?
Most 830 boards split each rail in the middle — the red/blue stripe often shows a gap. Bridge the two halves with a jumper wire and continuity returns. This is the #1 breadboard gotcha.
What power adapter should I buy for the barrel jack?
A regulated 9V DC adapter, center-positive, 5.5x2.1 mm plug, 1 A or more. 12V works but makes the module's linear regulators run hotter, lowering the usable current.
Can I power an Arduino or ESP32 from the module?
Yes — feed the board's 5V/VIN (or 3V3 for 3.3V boards) from the matching rail with grounds shared. Just never power the dev board from its USB and the rail's 5V simultaneously.
How much current can the breadboard itself handle?
Treat ~1 A as the practical ceiling per path — spring clips heat up beyond that. High-current loads belong on soldered protoboard or screw terminals, with only their control signals on the breadboard.
My module's LED is on but a rail reads 0V. What happened?
That side's jumper is on OFF (or half-seated), or the module's output pins missed the rail holes when you snapped it on. Re-seat the module so its four output pins land in the +/− rails, and set the jumper squarely on 5V or 3.3V.
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