Microscope led light circuit
About the Microscope led light circuit PCB
Microscope led light circuit is an open source PCB design by CGrassin, published on GitHub under the CC-BY-4.0 license. It is a 2-layer board measuring 40 × 21.1 mm, with 17 components from 14 distinct parts.
Other key parts include the NE555. By type, the board carries 6 resistors, 4 capacitors, 2 connectors, 2 diodes, 1 IC and 1 transistor.
From the project
A dimming LED circuit designed for optical microscopes.
This circuit drives a 1W or 3W LED to convert old optical microscopes from light bulb/halogen lamp to LED ligthing.
It is powered from a USB type C port and is fully dimmable. It may be used with a USB power bank, for instance.
LEDs are considerably more efficient (i.e. less heat), have a longer lifespan and have a better color accuracy than bulbs. My circuit has a high PWM frequency to avoid flickering and rolling bands effect in photographs.
Main components on the Microscope led light circuit
Microscope led light circuit bill of materials (BOM)
17 components, 14 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | NE555 | SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | AO3400A | SOT-23 | Q1 |
| 1 | USB_C_Receptacle | USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | XT30PW-F | PhoenixContact_MC_1,5_2-G-3.81_1x02_P3.81mm_Horizontal | J2 |
| 1 | 5k (RV097) | RV097 | RV1 |
| 2 | 4007 | D_SOD-123F | D1, D2 |
| 1 | 22n | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1 |
| 2 | 100n | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C2, C4 |
| 1 | 10u | CP_Elec_5x5.4 | C3 |
| 1 | 100 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1 |
| 1 | 1M | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R2 |
| 1 | 22 | R_1206_3216Metric | R3 |
| 1 | 510 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R4 |
| 2 | 5.1k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R5, R6 |
Microscope led light circuit design files
The KiCad project lives in the CGrassin/microscope_led_light_circuit repository on GitHub; these links point at the commit this page was built from.
Microscope led light circuit: common questions
How big is the Microscope led light circuit PCB?
The Microscope led light circuit measures 40 × 21.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Microscope led light circuit?
17 components, from 14 distinct parts. The full bill of materials is listed on this page.
Where can I download the Microscope led light circuit design files?
From the CGrassin/microscope_led_light_circuit repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Microscope led light circuit design in my own project?
Yes, under the terms of its CC-BY-4.0 license, which CGrassin chose for the repository.