Metering Board
AssemblyAnalog front end and microcontroller that convert photodiode current to an exposure value and solve it for the user’s chosen pair of exposure variables. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Metering Board parts and their functions
5 top-level parts · 66 parts in total · full bill of materials below
| # | Part | Qty | What it does |
|---|---|---|---|
| 1 | Bare PCB | 1× | Unpopulated printed circuit board: copper traces etched on an FR-4 glass-epoxy laminate that carry current between the components later soldered to it. |
| 2 | Transimpedance Op-Amp | 1× | Transimpedance amplifier |
| 3 | Microcontroller | 1× | Metering computer |
| 4 | SMD Passive (R/C/L) | 60× | Surface-mount resistors, capacitors, and inductors, typically in 0402 to 1206 packages, that set voltages, filter noise, and time signals on a circuit board. |
| 5 | Connector | 3× | Flex connectors to head, LCD, controls |
3D model
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Build & assembly graph
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Bill of materials for Metering Board
5 top-level lines · 5 rows shown · 66 parts total · indented to 3 levels| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Bare PCB | pcb-bare | 1× | 1 | · | part |
| 2 | Transimpedance Op-Amp | light-meter-op-amp | 1× | 1 | · | part |
| 3 | Microcontroller | mcu | 1× | 1 | · | part |
| 4 | SMD Passive (R/C/L) | smd-passives | 60× | 60 | · | part |
| 5 | Connector | connector | 3× | 3 | · | part |
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Where the metering board is used
1 product across 1 domain contain it, directly or inside a sub-assemblyUsed in 1 assembly
Sourcing: possible vendors
Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $1–$200. How estimates work| Vendor | HQ | Specialty | MOQ | Lead time |
|---|---|---|---|---|
|
🇨🇳JLCPCB
jlcpcb.com ↗
|
Shenzhen, CN | PCB fabrication | 100 pcs | 2–4 wks |
|
🇨🇳PCBWay
pcbway.com ↗
|
Shenzhen, CN | PCB fab & assembly | 100 pcs | 2–4 wks |
| scc.com.cn ↗ | Shenzhen, CN | PCB manufacturer | 100 pcs | 2–4 wks |
| shogini.com ↗ | Mumbai, IN | PCB manufacturer | 100 pcs | 2–4 wks |
| venture.com.sg ↗ | Singapore | Electronics contract mfg | 100 pcs | 2–4 wks |