Analog Synth Design Discussion
1:58
Below is a summary of a schematic wiring suggestion that connects all the components according to your design. Note that the following connections assume that you are working with the selected parts in your project:
Schematic Net Connections
| Connection Area | From (Pin / Component) | To (Pin / Component) | Coupling/Resistor/Capacitor Used | Notes |
|---|---|---|---|---|
| Power Distribution & Decoupling | +9V supply | U1, U2, LM386, and U3 | Decoupling: [C1] (100 µF) and [C2] (0.1 µF) – placed between +9V and Ground | All IC VCC pins on the 9V rail receive power; ensure a proper Ground connection at all GND pins. |
| Regulator Section | +9V supply → [U3 – 7805] (Input Pin) | [U3 – 7805] Output Pin (+5V) | Input decoupling [C3] and output decoupling [C4] | U3 generates the stable +5V rail for devices that need it (e.g. PT2399 delay, if added later). |
| NE555 Oscillator Timing Network | [U1 – NE555P] Pin7 | Along with [U1] Pins2/6 via resistor network: [R1] (~10 kΩ from +9V to Pin7) and [R2] (~100 kΩ from Pin7 to Pins2/6) | [R1] and [R2] | Sets the oscillator timing for the pulse train. |
| Oscillator Output Coupling | [U1 – NE555P] Pin3 | AC‑couple via [C5] (timing/AC‑coupling cap) to the signal path | [C5] (AC‑coupling capacitor) | This signal becomes the basis for further processing. |
| Mixer Input (Direct Path) | AC‑coupled NE555 signal from [U1] (after [C5]) | One of the summing inputs of [U2 – LM324N] (e.g. IN– on the chosen mixer channel) | [C5] if not already used for coupling here | Provides the direct (un-delayed) audio signal to the mixer. |
| Optional Feedback to Oscillator | [U2 – LM324N] Mixer Output (Pin1) | Back to [U1 – NE555P] Pin5 | Resistor/pot network (as available) | This optional connection enables “self-modulation” of the oscillator frequency. |
| Mixer Summing & Output Coupling | [U2 – LM324N] Mixer Output (Pin1) | AC‑couple via [C8] (≈10 µF) to [LM386] amplifier input ([LM386] Pin2) | [C8] (AC‑coupling capacitor) | The mixed signal (summing direct and any additional inputs you may add later) is fed forward. |
| Amplifier Output to Audio Jack | [LM386] Output (Pin5) | AC‑couple (using a 220 µF capacitor; if not yet placed, add as needed) → Tip of the J1 | 220 µF coupling capacitor | The final audio output is sent to the jack; the sleeve of the jack should connect to common ground. |
| Common Ground | GND pins of all ICs ([U1], [U2], [LM386], [U3]) | Connect to a dedicated Ground component | — | Ensure every component’s ground terminal is connected to maintain a common reference. |
Additional Notes
-
PT2399 Delay Stage & Comparator:
Your design calls for a pulse-shaping and delay stage (using an LM393 comparator and a PT2399 delay module). These components are not included in your current selected objects. The above wiring connects the available oscillator, mixer, and amplifier sections. If you choose to add the LM393 and PT2399 later, additional nets for AC‑coupling the LM393's output and routing into the PT2399 inputs, as well as necessary modulation injection points, will need to be defined. -
Power Decoupling & Timing Components:
Verify that each power pin on the ICs gets its dedicated decoupling capacitor as described, and ensure the timing network resistors ([R1] and [R2]) and capacitors are connected per the NE555 datasheet recommendations. -
Signal Coupling:
All AC‑coupling capacitors should be placed correctly in series with the audio signal path. Adjust component values (e.g. the 220 µF output capacitor) as per your frequency response requirements.
Would you like to proceed with applying these wiring suggestions as schematic changes, or do you need to adjust any specific connection details first?
Apply wiring suggestions
Add PT2399 and LM393
Use alternate timing network
386 days
Ready.
U5
R5
Resistance
10kΩ
R6
Resistance
10kΩ
C14
Capacitance
Capacitance
U4
Reviews
- Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portaljharwinbarrozo43.0M
- Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #powerjharwinbarrozo11.4M
- A generic fixed resistor ideal for rapid circuit topology development. Its footprint automatically adapts based on the selected package case code—supporting 0402, 0603, 0805, 1203, and many other standard SMD packages, as well as axial horizontal and vertical configurations. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0 ohm, 10 ohm, 100 ohm, 1.0k ohm, 10k ohm, 100k ohm, 1.0M ohm 1.1 ohm, 11 ohm, 110 ohm, 1.1k ohm, 11k ohm, 110k ohm, 1.1M ohm 1.2 ohm, 12 ohm, 120 ohm, 1.2k ohm, 12k ohm, 120k ohm, 1.2M ohm 1.3 ohm, 13 ohm, 130 ohm, 1.3k ohm, 13k ohm, 130k ohm, 1.3M ohm 1.5 ohm, 15 ohm, 150 ohm, 1.5k ohm, 15k ohm, 150k ohm, 1.5M ohm 1.6 ohm, 16 ohm, 160 ohm, 1.6k ohm, 16k ohm, 160k ohm, 1.6M ohm 1.8 ohm, 18 ohm, 180 ohm, 1.8K ohm, 18k ohm, 180k ohm, 1.8M ohm 2.0 ohm, 20 ohm, 200 ohm, 2.0k ohm, 20k ohm, 200k ohm, 2.0M ohm 2.2 ohm, 22 ohm, 220 ohm, 2.2k ohm, 22k ohm, 220k ohm, 2.2M ohm 2.4 ohm, 24 ohm, 240 ohm, 2.4k ohm, 24k ohm, 240k ohm, 2.4M ohm 2.7 ohm, 27 ohm, 270 ohm, 2.7k ohm, 27k ohm, 270k ohm, 2.7M ohm 3.0 ohm, 30 ohm, 300 ohm, 3.0K ohm, 30K ohm, 300K ohm, 3.0M ohm 3.3 ohm, 33 ohm, 330 ohm, 3.3k ohm, 33k ohm, 330k ohm, 3.3M ohm 3.6 ohm, 36 ohm, 360 ohm, 3.6k ohm, 36k ohm, 360k ohm, 3.6M ohm 3.9 ohm, 39 ohm, 390 ohm, 3.9k ohm, 39k ohm, 390k ohm, 3.9M ohm 4.3 ohm, 43 ohm, 430 ohm, 4.3k ohm, 43K ohm, 430K ohm, 4.3M ohm 4.7 ohm, 47 ohm, 470 ohm, 4.7k ohm, 47k ohm, 470k ohm, 4.7M ohm 5.1 ohm, 51 ohm, 510 ohm, 5.1k ohm, 51k ohm, 510k ohm, 5.1M ohm 5.6 ohm, 56 ohm, 560 ohm, 5.6k ohm, 56k ohm, 560k ohm, 5.6M ohm 6.2 ohm, 62 ohm, 620 ohm, 6.2k ohm, 62K ohm, 620K ohm, 6.2M ohm 6.8 ohm, 68 ohm, 680 ohm, 6.8k ohm, 68k ohm, 680k ohm, 6.8M ohm 7.5 ohm, 75 ohm, 750 ohm, 7.5k ohm, 75k ohm, 750k ohm, 7.5M ohm 8.2 ohm, 82 ohm, 820 ohm, 8.2k ohm, 82k ohm, 820k ohm, 8.2M ohm 9.1 ohm, 91 ohm, 910 ohm, 9.1k ohm, 91k ohm, 910k ohm, 9.1M ohm #generics #CommonPartsLibraryjharwinbarrozo1.5M
- A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF, 10pF, 100pF, 1000pF, 0.01uF, 0.1uF, 1.0uF, 10uF, 100uF, 1000uF, 10000uF 1.1pF, 11pF, 110pF, 1100pF 1.2pF, 12pF, 120pF, 1200pF 1.3pF, 13pF, 130pF, 1300pF 1.5pF, 15pF, 150pF, 1500pF, 0.015uF, 0.15uF, 1.5uF, 15uF, 150uF, 1500uF 1.6pF, 16pF, 160pF, 1600pF 1.8pF, 18pF, 180pF, 1800pF 2.0pF, 20pF, 200pF, 2000pF 2.2pF, 22pF, 220pF, 2200pF, 0.022uF, 0.22uF, 2.2uF, 22uF, 220uF, 2200uF 2.4pF, 24pF, 240pF, 2400pF 2.7pF, 27pF, 270pF, 2700pF 3.0pF, 30pF, 300pF, 3000pF 3.3pF, 33pF, 330pF, 3300pF, 0.033uF, 0.33uF, 3.3uF, 33uF, 330uF, 3300uF 3.6pF, 36pF, 360pF, 3600pF 3.9pF, 39pF, 390pF, 3900pF 4.3pF, 43pF, 430pF, 4300pF 4.7pF, 47pF, 470pF, 4700pF, 0.047uF, 0.47uF, 4.7uF, 47uF, 470uF, 4700uF 5.1pF, 51pF, 510pF, 5100pF 5.6pF, 56pF, 560pF, 5600pF 6.2pF, 62pF, 620pF, 6200pF 6.8pF, 68pF, 680pF, 6800pF, 0.068uF, 0.68uF, 6.8uF, 68uF, 680uF, 6800uF 7.5pF, 75pF, 750pF, 7500pF 8.2pF, 82pF, 820pF, 8200pF 9.1pF, 91pF, 910pF, 9100pF #generics #CommonPartsLibraryjharwinbarrozo1.5M
- A generic fixed inductor suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibraryjharwinbarrozo15.7k
- An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.Terminal
- 47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlinkjharwinbarrozo1.2M
- 10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcanjharwinbarrozo1.2M
- Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlinkjharwinbarrozo1.1M
Potential Apricot Flying Cab
Welcome to your new project. Imagine what you can build here.
Properties
Properties describe core aspects of the project.
Pricing & Availability
Distributor | Qty 1 |
|---|---|
Arrow | $11.26–$12.13 |
Digi-Key | $5.34–$5,831.75 |
LCSC | $2.40–$2.84 |
Mouser | $5.46 |
Verical | $30.15–$30.60 |
Controls
Welcome 👋
Flux helps you build PCBs faster with an AI teammate!
Create your account to collaborate, stay updated, fork your own version, and get instant answers from our AI agent.