Observation reva
About the Observation reva PCB
Observation reva is an open source PCB design by raffcorreia, published on GitHub under the MIT license. It is a 2-layer board measuring 30 × 21 mm, with 22 components from 12 distinct parts.
Other key parts include the TLV9064IDR, ADS1115IDGSR and 74LVC1G17GW. By type, the board carries 8 capacitors, 7 resistors, 4 ICs and 3 connectors.
From the project
REST API and local touch UI for invasive control of Samsung CJ791 monitors by electrically emulating the front-panel JOG button. Uses an inline hardware mod on the JOG harness and DDC/CI for feedback, status, and supported monitor functions like input detection and power control.
samsung-jog-api is a hardware-and-software project to make a Samsung CJ791 monitor locally programmable by electrically emulating its front-panel JOG control, exposing that behavior through a local REST API, and hosting a touch-first local control interface on a Raspberry Pi-based control deck.
This repository is organized around the Samsung LC34J791WTNXZA / CJ791 hardware in my setup. Related Samsung monitors with a similar multi-jog front-panel board may be adaptable, but the measurements and assumptions here are specific to this unit unless noted otherwise.
Main components on the Observation reva
Observation reva bill of materials (BOM)
22 components, 12 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TLV9064IDR Texas Instruments | SOIC-14_3.9x8.7mm_P1.27mm | U1 |
| 1 | ADS1115IDGSR Texas Instruments | MSOP-10_3x3mm_P0.5mm | U2 |
| 2 | 74LVC1G17GW Nexperia | SOT-353_SC-70-5 | U3, U4 |
| 1 | PinHeader_1x04_P2.54mm MONITOR_INPUT Generic | PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | PinHeader_1x07_P2.54mm HOST_IF Generic | PinHeader_1x07_P2.54mm_Vertical | J2 |
| 1 | SPARE_IF | PinHeader_1x02_P2.54mm_Vertical | J3 |
| 4 | CL05B104KO5NNNC 100n Samsung Electro-Mechanics | C_0402_1005Metric | C1, C2, C3, C4 |
| 1 | CL05A105KA5NNNC 1u Samsung Electro-Mechanics | C_0402_1005Metric | C5 |
| 3 | CL05C102JB5NNNC 1n Generic | C_0402_1005Metric | C6, C7, C8 |
| 3 | 0402WGF1002TCE 10k 1% Generic | R_0402_1005Metric | R1, R2, R3 |
| 2 | 0402WGF4701TCE 4.7k 1% Generic | R_0402_1005Metric | R4, R5 |
| 2 | 0 | R_0402_1005Metric | R6, R7 |
Observation reva design files
The KiCad project lives in the raffcorreia/samsung-jog-api repository on GitHub; these links point at the commit this page was built from.
Observation reva: common questions
How big is the Observation reva PCB?
The Observation reva measures 30 × 21 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Observation reva?
22 components, from 12 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 Observation reva design files?
From the raffcorreia/samsung-jog-api 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 Observation reva design in my own project?
Yes, under the terms of its MIT license, which raffcorreia chose for the repository.
