Source Files
SMD Parts
| Value | Package | Marking | Parts |
|---|---|---|---|
| 100 nF | 0805 | red | C1, C5, C6, C7, C10, C11 |
| 22 pF | 0805 | blue | C8, C9 |
| 330 Ohm | 0805 | green | R1, R7 |
| 220 KOhm | 0805 | pink | R3 |
| 1 KOhm | 0805 | yellow | R5, R6 |
| 10 KOhm | 0805 | black | R4, R8, R10 |
| BC817C | SOT23 | 8C | T1 |
| ZR431 | SOT23 | 43A | IC2 |
Schematic
Placement of Components
Finished Board
Bug Fixes
The design contains (at least) 3 errors in the schematic and the PCB layout:
| Number | Description | Affected Parts | Fix |
|---|---|---|---|
| 1 | R8 is connected to the wrong pin of the RF module | R8, RFM12 | Solder R8 90 degrees rotated as shown in picture 1. Connect the now unconnected side of R8 with the pin shown in the picture using a thin wire. |
| 2 | R9 is not needed | R9 | Replace R9 with a solder bridge as shown in picture 1. |
| 3 | PCB layout for IC2 is wrong | IC2 | Solder IC2 as shown in picture 2. Do not solder it as shown in picture 1! |