A simple devboard with some cute curious george motifs - my first hardware project/PCB, built using @KaiPereira's starter guide on stasis. Like any good devboard, the monkeyboard contains an SoC, memory, power management and I/O interfaces: it receives power via its USB-C connector port, maintains a quad SPI flash memory IC for data storage, 2 multipurpose switches, a crystal oscillator for precise electrical frequencies, and the star of the show, the RP2040 as its MCU.
| Item |
Purpose |
Quantity |
Cost |
Source |
| C1, C2 |
10uF decoupling capacitor |
2 |
$0.0800 |
JLCPCB Basic (CL10A106KP8NNNC) |
| C3, C18 |
1uF decoupling capacitor |
2 |
$0.0660 |
JLCPCB Extended (GRM155R60J105KE19D) |
| C4, C5, C19, C20, C22, C23, C24, C26 |
0.1uF decoupling capacitor |
8 |
$0.0845 |
JLCPCB Basic (CL05B104KO5NNNC) |
| C15, C16 |
33pF crystal load capacitor |
2 |
$0.0130 |
JLCPCB Basic (0402CG330J500NT) |
| C17, C21, C25 |
0.1uF decoupling capacitor |
3 |
$0.0845 |
JLCPCB Basic (CL05B104KO5NNNC) |
| J1 |
USB-C receptacle |
1 |
$0.9155 |
JLCPCB Extended (TYPE-C-31-M-12) |
| J2, J3 |
20-pin GPIO header |
2 |
— |
Solder yourself |
| J4 |
3-pin SWD debug header |
1 |
— |
Solder yourself |
| R1, R2 |
5.1K CC pull-down resistor |
2 |
$0.0090 |
JLCPCB Basic (0402WGF5101TCE) |
| R3, R4 |
27Ω USB termination resistor |
2 |
$0.0176 |
JLCPCB Extended (0402WGF270JTCE) |
| R5, R7, R8 |
1K resistor |
3 |
$0.0150 |
JLCPCB Extended (RCT021KFLF) |
| R6 |
10K pull-up resistor |
1 |
$0.0065 |
JLCPCB Basic (0402WGF1002TCE) |
| SW1, SW2 |
Push button |
2 |
$0.5550 |
JLCPCB Basic (TS-1088-AR02016) |
| U1 |
MCP1700 3.3V LDO regulator |
1 |
$2.4285 |
JLCPCB Extended (MCP1700T-3302E/TT) |
| U2 |
RP2040 microcontroller |
1 |
$4.8810 |
JLCPCB Extended (RP2040) |
| U3 |
W25Q16 16Mbit flash memory |
1 |
$6.3910 |
JLCPCB Extended (W25Q16JVZPIQ TR) |
| Y1 |
12MHz crystal oscillator |
1 |
$0.8382 |
JLCPCB Extended (XJHCELNANF-12MHZ) |
Total: $16.38
