Rarara
About the Rarara PCB
Rarara is an open source AVR/Arduino PCB design by knx444, published on GitHub. It is a 2-layer board measuring 90 × 100 mm, with 34 components from 28 distinct parts.
Its main chip is the ATmega8A-P, from the AVR/Arduino family. Other key parts include the PC817, LM7805_TO220, TL431LP and TC4420. By type, the board carries 5 ICs, 2 diodes, 1 transistor, 1 crystal, 1 switch and 1 capacitor.
Main components on the Rarara
Rarara bill of materials (BOM)
34 components, 28 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | PC817 | DIP-4_W7.62mm | U1 |
| 1 | LM7805_TO220 | TO-220-3_Vertical | U3 |
| 1 | TL431LP | TO-92_Inline | U4 |
| 1 | TC4420 | DIP-8_W7.62mm | U5 |
| 1 | ATmega8A-P | DIP-28_W7.62mm | U6 |
| 1 | IRFP450 | TO-247-3_Vertical | Q2 |
| 1 | HC-49US_16.000MHZ | XTAL_HC-49US-16.000MHZ | Y2 |
| 1 | J2 | TerminalBlock_MetzConnect_Type094_RT03502HBLU_1x02_P5.00mm_Horizontal | 3.3mHIn1 |
| 1 | J4 | TerminalBlock_MetzConnect_Type094_RT03502HBLU_1x02_P5.00mm_Horizontal | 12VIn1 |
| 1 | J1 | TerminalBlock_MetzConnect_Type094_RT03502HBLU_1x02_P5.00mm_Horizontal | 120VIn1 |
| 1 | J3 | TerminalBlock_MetzConnect_Type094_RT03502HBLU_1x02_P5.00mm_Horizontal | 240VOu1 |
| 1 | C | C_Radial_D5.0mm_H11.0mm_P2.00mm | AREF_C1 |
| 1 | 1.5uF | C_Rect_L15mm_W10mm_P16.00mm_MKT | CIn1 |
| 2 | 10uF | C_Radial_D6.3mm_H5.0mm_P2.50mm | CLIn1, CLOu1 |
| 2 | 10 | R_Axial_DIN0411_L9.9mm_D3.6mm_P12.70mm_Horizontal | CLim1, GCLim1 |
| 1 | 500 | R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | CLim2 |
| 1 | 1K | R_Axial_DIN0411_L9.9mm_D3.6mm_P12.70mm_Horizontal | CLim3 |
| 2 | 2.2uF | C_Rect_L22.0mm_W10.0mm_P20.00mm_MKS4 | COu1, COu2 |
| 1 | 10K | R_Axial_DIN0411_L9.9mm_D3.6mm_P12.70mm_Horizontal | GatePd1 |
| 1 | Heatsink_Pad | Heatsink_45x15mm_2xFixation3mm | HS1 |
Show 8 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | 10K | R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | OCPd1, SPd1, VDiv2 |
| 1 | 100K | R_Axial_DIN0411_L9.9mm_D3.6mm_P12.70mm_Horizontal | RSTPu1 |
| 1 | FSM8JH | SW_FSM8JH | S1 |
| 1 | 940K | R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | VDiv1 |
| 2 | C | C_Disc_D4.3mm_W1.9mm_P5.00mm | c_Crystal1, c_Crystal2 |
| 1 | LED | LED_D5.0mm | D1 |
| 1 | MUR860 | TO508P1050X476X2020-2 | D2 |
| 1 | 100nF | C_Disc_D10.0mm_W2.5mm_P5.00mm | C6 |
Rarara design files
The KiCad project lives in the knx444/rarara repository on GitHub; these links point at the commit this page was built from.
- LayoutPower_ELect.kicad_pcb
- SchematicPower_ELect.kicad_sch
Rarara: common questions
What microcontroller does the Rarara use?
The Rarara is built around the ATmega8A-P, from the AVR/Arduino family.
How big is the Rarara PCB?
The Rarara measures 90 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Rarara?
34 components, from 28 distinct parts. The full bill of materials is listed on this page.
Where can I download the Rarara design files?
From the knx444/rarara repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Rarara design in my own project?
The repository has no license, so all rights stay with knx444. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Rarara without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
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