BalancerREF OptHead
About the BalancerREF OptHead PCB
BalancerREF OptHead is an open source PCB design by natehorst240-sketch, published on GitHub. It is a 4-layer board measuring 25 × 50 mm, with 24 components from 19 distinct parts.
Other key parts include the TS3021IYLT and TLV9062IDR. By type, the board carries 12 resistors, 6 capacitors, 2 ICs, 1 transistor, 1 connector and 1 diode.
It belongs with the power & battery, rf & radio and test & measurement designs in this gallery.
From the project
Hobby helicopter rotor-balancing instrumentation. KiCad 10 projects plus ESP32-S3 firmware.
Hobby helicopter rotor-balancing instrumentation. KiCad 10 projects plus ESP32-S3 firmware.
Open the projects in KiCad 10.0.3 or later. They use the KiCad 10 file format and KiCad 9 will not open them.
Both boards are routed. On the main board SYS, SYSSW, BAT and USBVBUS had been routed across In2.Cu, which is the +3V3 plane; those tracks were removed on 2026-09-18 so the plane is whole again, and those four nets were then re-routed on the outer layers (PR #7, merged with Rev G on 2026-09-19). The Rev G connections (U7 pass-through, R39) are routed too. BalancerREF/review/drc-review.rpt…
Main components on the BalancerREF OptHead
BalancerREF OptHead bill of materials (BOM)
24 components, 19 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TS3021IYLT | SOT-23-5 | U4 |
| 1 | TLV9062IDR | SOIC-8_3.9x4.9mm_P1.27mm | U8 |
| 1 | AO3400A | SOT-23 | Q1 |
| 1 | TO MAIN BOARD | JST_GH_SM07B-GHS-TB_1x07-1MP_P1.25mm_Horizontal | J5 |
| 1 | SFH 2440 | Osram_SFH2440 | PD1 |
| 1 | XPEBRD-L1 625nm | LED_Cree-XP | D1 |
| 1 | 100u / 10V | C_1210_3225Metric | C20 |
| 1 | 47p C0G | C_0805_2012Metric | C21 |
| 1 | 10n | C_0805_2012Metric | C22 |
| 3 | 100n | C_0805_2012Metric | C23, C24, C25 |
| 1 | 3R9 1206 0.5W | R_1206_3216Metric | R18 |
| 1 | 100R | R_0603_1608Metric | R19 |
| 1 | 100k | R_0603_1608Metric | R20 |
| 1 | 4.99k | R_0603_1608Metric | R21 |
| 4 | 10k | R_0603_1608Metric | R22, R24, R25, R27 |
| 1 | 240k | R_0603_1608Metric | R23 |
| 1 | 22k | R_0603_1608Metric | R26 |
| 1 | 470k | R_0603_1608Metric | R28 |
| 1 | 33R | R_0603_1608Metric | R32 |
BalancerREF OptHead design files
The KiCad project lives in the natehorst240-sketch/HoboBalancer repository on GitHub; these links point at the commit this page was built from.
BalancerREF OptHead: common questions
How big is the BalancerREF OptHead PCB?
The BalancerREF OptHead measures 25 × 50 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the BalancerREF OptHead?
24 components, from 19 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the BalancerREF OptHead design files?
From the natehorst240-sketch/HoboBalancer repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the BalancerREF OptHead design in my own project?
The repository has no license, so all rights stay with natehorst240-sketch. Use it as a reference, and ask the author before reusing the design.
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