Twilight switch
About the Twilight switch PCB
Twilight switch is an open source PCB design by joseguerra3000, published on GitHub. It is a 2-layer board measuring 73 × 35.6 mm, with 21 components from 16 distinct parts.
Other key parts include the LM7805CT, LM555N and LM7812CT. By type, the board carries 8 capacitors, 3 ICs, 3 diodes, 3 resistors and 1 transistor.
It belongs with the sensors designs in this gallery.
From the project
System able to control a relee to turn on or off exterior lights depending on the lighting.
README ====== System able to control a relee to turn on or off exterior lights depending on the lighting.
Main components on the Twilight switch
Twilight switch bill of materials (BOM)
21 components, 16 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM7805CT | TO-220_Neutral123_Vertical | U1 |
| 1 | LM555N | SOIC-8-N | U2 |
| 1 | LM7812CT | TO-220_Neutral123_Vertical | U3 |
| 1 | BD139 | SOT126_SOT32_Housing_Vertical_BigPads | Q1 |
| 1 | Photores | pin_socket_2mm_2 | LDR1 |
| 1 | SolderWirePad_single_2mmDrill | SolderWirePad_single_2mmDrill | LOW-AC2 |
| 1 | RELAY_HJR-3FF_Z | relay_hjr-3ff_z | RLY1 |
| 1 | Diode_Bridge | bridge_DFM | D1 |
| 1 | Led_Small | led_5mm_green | D2 |
| 1 | 1N4007 | Diode_DO-41_SOD81_Vertical_AnodeUp | D3 |
| 1 | 10nF | C_Disc_D6_P5 | C1 |
| 3 | 470uF | C_Radial_D8_L21_P3.8 | C2, C4, C6 |
| 4 | 100nF | C_Disc_D3_P2.5 | C3, C5, C7, C8 |
| 1 | 400k | RC05 | R2 |
| 1 | 560 | RC07 | R3 |
| 1 | 2k | RC07 | R4 |
Twilight switch design files
The KiCad project lives in the joseguerra3000/twilight-switch repository on GitHub; these links point at the commit this page was built from.
Twilight switch: common questions
How big is the Twilight switch PCB?
The Twilight switch measures 73 × 35.6 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Twilight switch?
21 components, from 16 distinct parts. The full bill of materials is listed on this page.
Where can I download the Twilight switch design files?
From the joseguerra3000/twilight-switch repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Twilight switch design in my own project?
The repository has no license, so all rights stay with joseguerra3000. Use it as a reference, and ask the author before reusing the design.
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