BOJACK 1350 Pcs Resistor Kit

BOJACK 1350 Resistor Kit: Color Code Reference

For Arduino and Raspberry Pi prototyping, the BOJACK 1350 kit covers 50 resistance values.

Ranging from 0Ω jumper resistors to 5.6MΩ high-impedance parts, this assortment spans the full working range of general hobbyist builds. With 25 to 50 pieces per value at standard E-series intervals¹, you have enough stock for multiple builds without running out of high-demand values like 10kΩ or 470Ω mid-project.² Selecting the color bands in the calculator above confirms any value from the kit instantly, including 5-band metal film resistors where the tight 1% tolerance requires reading all five bands correctly.³

Specifications²

Practical circuit applications across the BOJACK kit's full 0Ω to 5.6MΩ range

Across the BOJACK kit's 50-value span, four distinct circuit application zones map to natural groupings inside the labeled compartment box. Knowing which zone to reach for at each design step removes the need to search through the full assortment each time, and this mental map speeds up prototyping by letting you grab the right decade group before reading individual band colors.

In the low-resistance zone (1Ω to 33Ω), you find current-sense shunts, USB D+ and D- series termination resistors (33Ω),⁴ and emitter-degeneration resistors for small-signal BJT stages. The mid-range zone (47Ω to 4.7kΩ) covers LED current limiting, transistor base resistors, I²C pull-ups, and voltage dividers for microcontroller ADC inputs. From 10kΩ to 100kΩ, you reach the standard GPIO pull-up values, voltage dividers for battery monitoring, and op-amp feedback resistors for gain stages with moderate impedance. Above 100kΩ, the kit's values include high-impedance sensor bias resistors and ultra-low-power pull-ups for deep-sleep embedded designs.

Using the 0Ω jumper resistors for PCB population options

The BOJACK kit includes 0Ω resistors identified by a single black band on an otherwise plain body. These are not resistors in the electrical sense; they are conductive wire jumpers in resistor form.⁵ PCB designers use 0Ω components to create solder-populate options: place a 0Ω footprint in a signal path, and you can either populate it to connect the path or leave it open to break it, without changing the PCB layout. In prototyping, using a 0Ω resistor from the BOJACK kit in a jumper position instead of a wire bridge lets you swap between connection and open states quickly across multiple boards without soldering and desoldering wire.

5-band color code reading technique for BOJACK ±1% metal film resistors

All BOJACK kit resistors use the 5-band ±1% metal film color code. Reading them correctly requires confirming the reading direction before interpreting the digit bands. The tolerance band (Brown for ±1%) sits at one end of the resistor with a slightly wider gap between it and the multiplier band; start reading from the opposite end.

For the three digit bands, read left to right: each band's color maps to a digit from 0 to 9 using the standard IEC 60062 color sequence (Black=0, Brown=1, Red=2, Orange=3, Yellow=4, Green=5, Blue=6, Violet=7, Gray=8, White=9).³ The fourth band is the multiplier: Black=×1, Brown=×10, Red=×100, Orange=×1000, Yellow=×10000, Green=×100000. The fifth band is always Brown for ±1% in this kit. Multiplying the three-digit number by the multiplier gives the resistance value in ohms.

Common misread patterns and how to avoid them

Two common errors occur when reading 5-band BOJACK resistors. The first is reading from the wrong end: if the first band after the wide gap appears to be Brown and the result gives a non-E-series value, flip the resistor and re-read. The second error is confusing the Brown multiplier band (fourth position) with the Brown tolerance band (fifth position). The tolerance band always occupies the end position with the larger gap. If you see two consecutive Brown bands in the middle of the resistor, you are reading a value where both the third digit (Brown = 1) and the multiplier (Brown = ×10) are Brown, which is the 5-band code for any XXX.1 × 10 = XX.1 value family.

Using the calculator above eliminates both misread errors. Select each band color in sequence and read a 5-band resistor value with the displayed value confirming the reading. For a reading that produces a non-standard value, re-enter from the opposite end and compare both results against the E-series table. When the BOJACK kit is used across multiple prototyping sessions, the compartment labels can fade or become illegible, and having the calculator confirm each resistor value before it goes into a precision voltage divider or ADC reference circuit prevents the subtle measurement errors that would otherwise take hours to trace back to a misidentified component.

Sorting mixed BOJACK resistors by decade

Sort by the multiplier band first, then by the three digit bands. This groups the BOJACK kit into decade piles before you confirm each value, making it faster to return mixed resistors to the correct compartment. For the BOJACK 50-value kit, start by separating all resistors into five rough groups: single-digit multipliers for ones and teens, Brown multiplier for tens, Red multiplier for hundreds, Orange multiplier for kilohms, and Yellow or Green multiplier for tens of kilohms and megaohms.