Analog board
About the Analog board
Analog board is an open source PCB design by minisystem, published on GitHub. It is a 2-layer board measuring 200 × 150 mm, with 500 components from 85 distinct parts.
Other key parts include the LM13700, DG212B, TL074-, AD5556 and TL072-. By type, the board carries 217 resistors, 135 capacitors, 42 ICs, 39 test points, 20 transistors and 13 diodes.
From the project
Programmable Monosynth Prototype
Digital board tested and working. SPI LED driving and switch reading tested. ADC pot reading but there is some cross-talk on potentiometer ADC channels. Allowing sufficient settling time at ADC node between reads seems to mostly remedy this to <= 1 LSB.
NOISE/LFO/S&H tested and working, except for multiplexer latch problem mentioned below. Noise gain needed to be adjusted by changing R180 to 10K and R181 to 750K (two 1.5M 0603s stacked in parallel). Also LFO module needede R3 (on module board) changed to 270K from 1M to get proper adjustment of sine/tri symmetry. Sine symmetry is too…
Main components on the Analog board
Analog board bill of materials (BOM)
500 components, 85 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 8 | LM13700 | SO16-JRL | U1, U2, U3, U18, U19, U29, U30, U32 |
| 3 | DG212B | TSSOP-16 | U4, U11, U12 |
| 13 | TL074- | tssop-14 | U5, U8, U22, U23, U24, U25, U27, U28 +5 |
| 1 | AD5556 | TSSOP-28 | U6 |
| 4 | TL072- | TSSOP8-JRL | U7, U15, U21, U26 |
| 1 | AD8672 | SOIC-8-JRL | U9 |
| 1 | ADR01 | SOT-23-5 | U10 |
| 5 | DG408 | SO16-JRL | U13, U14, U16, U17, U45 |
| 1 | 74HC75 | tssop-16 | U20 |
| 1 | 74LV573 | SSOP-20 | U36 |
| 1 | DG419 | SOIC-8-JRL | U40 |
| 1 | LM7812 | D2-PAK-5733-HEAT-SINK | U43 |
| 1 | LM7912 | D2-PAK-5733-HEAT-SINK | U44 |
| 1 | 7805 | DPAK-2 | U46 |
| 16 | 2N3906 | SOT23-JRL | Q1, Q2, Q3, Q4, Q5, Q7, Q8, Q9 +8 |
| 1 | BCM857BS | SOT363-JRL | Q6 |
| 2 | NPN | SOT23-JRL | Q17, Q18 |
| 1 | J111 | SOT23-JRL | Q19 |
| 1 | AC IN | 2.1-MM-DC-EJ508A | J1 |
| 1 | OUT | JACK_6.35_STEREO_TAYDA | J2 |
Show 65 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CONN_20X2 | PIN_ARRAY_20X2 | J3 |
| 1 | CONN_01X02 | PIN_ARRAY_2X1 | P2 |
| 2 | EG | EG | EG1, EG2 |
| 1 | VAL** | HOLE-0.125-INCH | HOLE-0.125-INCH |
| 3 | VCO | VCO-SIP | LFO1, VCO1, VCO2 |
| 39 | CONN_1 | TEST POINT | TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8 +31 |
| 16 | 100K | Bourns_3362P | TR1, TR2, TR3, TR4, TR5, TR8, TR9, TR10 +8 |
| 4 | 20K | Bourns-3296W | TR6, TR7, TR20, TR22 |
| 1 | 20K | Bourns_3362P | TR17 |
| 2 | 100K | Bourns-3296W | TR18, TR19 |
| 1 | VCF_VCA | VCF-VCA | VCFA1 |
| 4 | DIODE | SOD323-JRL | D1, D2, D3, D4 |
| 6 | DIODE | SMB | D5, D6, D7, D8, D9, D10 |
| 2 | LED | LED-0805-JRL | D11, D12 |
| 1 | 1N4148 | SOD323-JRL | D13 |
| 4 | 1µ | SMD-1206_Pol | C1, C8, C10, C18 |
| 50 | 0.1µ | SM0603-C-JRL | C2, C9, C11, C15, C17, C23, C24, C25 +42 |
| 15 | 10p | SM0603-C-JRL | C3, C4, C5, C12, C13, C14, C16, C81 +7 |
| 2 | 5.6p | SM0603-C-JRL | C6, C7 |
| 12 | 1µ | SM0603-C-JRL | C19, C20, C21, C22, C93, C94, C96, C97 +4 |
| 2 | 470n | CAP-5MM-BOX-0805-COMBO | C47, C48 |
| 32 | 0.01µ | SM0603-C-JRL | C49, C50, C51, C52, C53, C54, C55, C56 +24 |
| 2 | 47μ | 2MM-POL-CAP | C89, C91 |
| 1 | 100n | SM0603-C-JRL | C90 |
| 1 | 1µ | 2MM-POL-CAP | C92 |
| 1 | 10μ | 2MM-POL-CAP | C95 |
| 2 | 22µ | 2MM-POL-CAP | C100, C134 |
| 1 | 4.7n | SM0603-C-JRL | C102 |
| 4 | 1000µ | 5MM-POL-CAP | C105, C106, C108, C109 |
| 1 | 100n | CAP-5MM-BOX-0805-COMBO | C107 |
| 1 | 1.5n | SM0603-C-JRL | C110 |
| 1 | 100pF | SM0603-C-JRL | C111 |
| 3 | 2.2µ | SMD-1206_Pol | C112, C113, C116 |
| 28 | 12K | SM0603-R-JRL | R1, R2, R3, R4, R5, R26, R27, R28 +20 |
| 28 | 510 | SM0603-R-JRL | R6, R7, R8, R9, R13, R16, R17, R19 +20 |
| 15 | 2.2M | SM0603-R-JRL | R10, R11, R12, R24, R25, R91, R92, R102 +7 |
| 7 | 68K | SM0603-R-JRL | R14, R15, R18, R126, R127, R128, R129 |
| 11 | 18K | SM0603-R-JRL | R22, R23, R93, R94, R103, R146, R170, R171 +3 |
| 15 | 47K | SM0603-R-JRL | R31, R32, R33, R34, R38, R99, R100, R105 +7 |
| 7 | 91K | SM0603-R-JRL | R35, R36, R37, R141, R142, R143, R144 |
| 5 | 1K | SM0603-R-JRL | R39, R189, R193, R206, R207 |
| 8 | 270K | SM0603-R-JRL | R40, R41, R42, R147, R148, R149, R150, R216 |
| 57 | 100K | SM0603-R-JRL | R43, R44, R45, R46, R47, R48, R49, R50 +49 |
| 1 | 33K | SM0603-R-JRL | R68 |
| 1 | 1K 3300ppm/K | SM0805-HAND | R69 |
| 1 | 39K | SM0603-R-JRL | R76 |
| 4 | 4.7K | SM0603-R-JRL | R82, R83, R85, R86 |
| 8 | 10K | SM0603-R-JRL | R160, R179, R185, R191, R201, R205, R211, R213 |
| 1 | 3.3M | SM0603-R-JRL | R161 |
| 1 | 390K | SM0603-R-JRL | R162 |
| 2 | 27K | SM0603-R-JRL | R166, R168 |
| 1 | 680K** | SM0603-R-JRL | R169 |
| 1 | 150K | SM0603-R-JRL | R177 |
| 1 | 22 | SM0603-R-JRL | R178 |
| 1 | 15K | SM0603-R-JRL | R180 |
| 2 | 470K | SM0603-R-JRL | R181, R203 |
| 1 | 120K | SM0603-R-JRL | R182 |
| 1 | 1.5K | SM0603-R-JRL | R186 |
| 1 | 20K | SM0603-R-JRL | R194 |
| 1 | 2.2meg | SM0603-R-JRL | R197 |
| 2 | 220K | SM0603-R-JRL | R208, R209 |
| 1 | 3.3K | SM0603-R-JRL | R210 |
| 2 | 9.1K | SM0603-R-JRL | R212, R214 |
| 1 | 10K | SM0603-JRL | R215 |
| 1 | 22K | SM0603-R-JRL | R217 |
Analog board design files
The KiCad project lives in the minisystem/MonApollo repository on GitHub; these links point at the commit this page was built from.
- Layoutanalog-board.kicad_pcb
Analog board: common questions
How big is the Analog board?
The Analog board measures 200 × 150 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Analog board?
500 components, from 85 distinct parts. The full bill of materials is listed on this page.
Where can I download the Analog board design files?
From the minisystem/MonApollo repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Analog board design in my own project?
The repository has no license, so all rights stay with minisystem. Use it as a reference, and ask the author before reusing the design.
