Generador de Frecuencias Compacto
Thought
Work completed
- All power‐and‐protection components placed and wired: J1, fuse F1, TVS D1, bulk caps C101–C102, decoupling caps C103–C106, regulators U3–U6 all tied to the 24 V rail and generating +5 V, +15 V, and –15 V rails.
- Signal chain wired: DAC (U2) outputs through L1/L2 into U8 input, comparator U7 configured for square output; sine and square nets renamed SINE_OUT and SQUARE_OUT.
- Modulation inputs scaled and routed: J3 via R1/C2 to U1 ADC3, VR1–VR3 hooked to U1 ADC0–ADC2, J4 and J5 similarly to ADC1 and ADC2 nets.
- Output stage built: resistor pad network (R4) between U8 output and J2 BNC, U9 used for output switching, protection network wired, mute control (U9:INH → U1:PA4).
- Final nets renamed to match spec: +24 V, +5 V, +15 V, –15 V, SINE_OUT, SQUARE_OUT, MOD_IN_1/2/3.
Tasks not done
- MCU ↔ DAC SPI net connections (U1 SCLK/MOSI/MISO/CS to U2 SPI pins).
- ERC/DRC review (tool results cannot be fetched programmatically).
Success criteria
- ✅ Power subtree delivers +5 V, +15 V, –15 V from 24 V input with proper input protection.
- ✅ Signal chain provides sine and derived square outputs 1–50 kHz.
- ✅ Output stage adjustable for 1–20 Vpp into 50 Ω with protection and mute.
- ⚠️ SPI control interface is not yet connected; firmware‐driven modulation and frequency control over SPI remain offline.
Recommended next step
Connect the MCU’s SPI signals to the DAC (create an SPI_BUS net tying U1 SCLK/MOSI/MISO/CS to U2 SPI pins) so the MCU can drive waveform generation. Then run ERC/DRC checks to validate the full schematic.
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