Tables

The numbers the engines use. Each file names its source; a section with a source of its own shows it. Tag r: read from the source.

`tables/audio_sources.toml`

pickups (DC resistance, resonant peak where stated), piezo discs (capacitance) and electret capsules (output impedance, measurement load) as the makers state them – the source models of sim.json ac

Source: the makers' product pages and datasheets, as noted per row, read 2026-10-31 · tag r

`pickup.Seymour Duncan SH-1 '59 Model neck` Seymour Duncan, Pickup Comparison Chart (blog post of 2013-04-21, last updated 2020-02-07, 'the archived version'), Humbuckers & Trembuckers, SH-1 59 Model: DC resistance neck 7.43 k, resonant peak neck 6.8 kHz – https://www.seymourduncan.com/blog/latest-updates/pickup-comparison-chart, read 2026-10-31; the product page lists DCR per variant (Neck: 7.60k) without a resonant peak · tag r
`r_ohm`	7430
`f_peak_hz`	6800
`pickup.Seymour Duncan SH-1 '59 Model bridge` Seymour Duncan, Pickup Comparison Chart (archived, last updated 2020-02-07), SH-1 59 Model: DC resistance bridge 8.13 k, resonant peak bridge 6 kHz – https://www.seymourduncan.com/blog/latest-updates/pickup-comparison-chart, read 2026-10-31; the product page lists Bridge: 8.2k · tag r
`r_ohm`	8130
`f_peak_hz`	6000
`pickup.Seymour Duncan SH-2 Jazz Model neck` Seymour Duncan, Pickup Comparison Chart (archived, last updated 2020-02-07), SH-2 Jazz Model: DC resistance neck 7.72 k, resonant peak neck 8 kHz – https://www.seymourduncan.com/blog/latest-updates/pickup-comparison-chart, read 2026-10-31 · tag r
`r_ohm`	7720
`f_peak_hz`	8000
`pickup.Seymour Duncan SH-4 JB Model bridge` Seymour Duncan, Pickup Comparison Chart (archived, last updated 2020-02-07), SH-4 JB Model: DC resistance bridge 16.4 k, resonant peak bridge 5.5 kHz – https://www.seymourduncan.com/blog/latest-updates/pickup-comparison-chart, read 2026-10-31; the product page lists Bridge 16.6k · tag r
`r_ohm`	16400
`f_peak_hz`	5500
`pickup.Seymour Duncan SH-55 Seth Lover neck` Seymour Duncan, Pickup Comparison Chart (archived, last updated 2020-02-07), SH-55 Seth Lover Model: DC resistance neck 7.2 k, resonant peak neck 8.14 kHz – https://www.seymourduncan.com/blog/latest-updates/pickup-comparison-chart, read 2026-10-31 · tag r
`r_ohm`	7200
`f_peak_hz`	8140
`pickup.Seymour Duncan SH-55 Seth Lover bridge` Seymour Duncan, Pickup Comparison Chart (archived, last updated 2020-02-07), SH-55 Seth Lover Model: DC resistance bridge 8.1 k, resonant peak bridge 5.9 kHz – https://www.seymourduncan.com/blog/latest-updates/pickup-comparison-chart, read 2026-10-31 · tag r
`r_ohm`	8100
`f_peak_hz`	5900
`pickup.Seymour Duncan SSL-1 Vintage Staggered` Seymour Duncan, Pickup Comparison Chart (archived, last updated 2020-02-07), Strat True Single Coils, SSL-1 Vintage Staggered: DC resistance 6.5 k, resonant peak 10 kHz – https://www.seymourduncan.com/blog/latest-updates/pickup-comparison-chart, read 2026-10-31 · tag r
`r_ohm`	6500
`f_peak_hz`	10000
`pickup.DiMarzio DP100 Super Distortion` DiMarzio, Super Distortion (SKU DP100CR), product page: Resistance 13.68 Kohm – https://www.dimarzio.com/pickups/high-power/super-distortion, read 2026-10-31 · tag r
`r_ohm`	13680
`pickup.DiMarzio DP103 PAF 36th Anniversary Neck` DiMarzio, PAF 36th Anniversary Neck (SKU DP103CR), product page: Resistance 7.31 Kohm – https://www.dimarzio.com/pickups/vintage-paf-output/paf-36th-anniversary-neck, read 2026-10-31 · tag r
`r_ohm`	7310
`pickup.DiMarzio DP223 PAF 36th Anniversary Bridge` DiMarzio, PAF 36th Anniversary Bridge (SKU DP223BK), product page: Resistance 8.60 Kohm – https://www.dimarzio.com/pickups/vintage-paf-output/paf-36th-anniversary-bridge, read 2026-10-31 · tag r
`r_ohm`	8600
`pickup.DiMarzio DP175 True Velvet Neck` DiMarzio, True Velvet Neck (SKU DP175BK), product page: Resistance 6.21 Kohm – https://www.dimarzio.com/pickups/standard-strat/true-velvet-neck, read 2026-10-31 · tag r
`r_ohm`	6210
`pickup.Mojotone '59 Clone humbucker neck` Mojotone, '59 Clone Vintage P.A.F. style Humbucker Pickup, product page, Specs: Neck 7.4K – https://mojotone.com/products/mojotone-59-clone-vintage-p-a-f-style-humbucker-pickup, read 2026-10-31 · tag r
`r_ohm`	7400
`pickup.Mojotone '59 Clone humbucker bridge` Mojotone, '59 Clone Vintage P.A.F. style Humbucker Pickup, product page, Specs: Bridge 8.2K – https://mojotone.com/products/mojotone-59-clone-vintage-p-a-f-style-humbucker-pickup, read 2026-10-31 · tag r
`r_ohm`	8200
`pickup.Mojotone '58 Quiet Coil Strat neck and middle` Mojotone, '58 Quiet Coil Noiseless Strat Pickup, product page, Specs: Neck & Middle 5.9K – https://mojotone.com/products/58-quiet-coil-strat-r-pickup, read 2026-10-31 · tag r
`r_ohm`	5900
`pickup.Mojotone '58 Quiet Coil Strat bridge` Mojotone, '58 Quiet Coil Noiseless Strat Pickup, product page, Specs: Bridge 11.6K – https://mojotone.com/products/58-quiet-coil-strat-r-pickup, read 2026-10-31 · tag r
`r_ohm`	11600
`piezo.Murata 7BB-12-9` Murata, Product Search Data Sheet 7BB-12-9 (last updated 03/18/2022), Specifications: Resonance Frequency 9.0kHz ±1.0kHz, Resonant Impedance (R1) 1000Ω, Capacitance 8nF ±30% [1kHz], plate 12 mm – via LCSC C3812435 (https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2308111423_Murata-Electronics-7BB-12-9_C3812435.pdf), read 2026-10-31 · tag r
`c_f`	8e-09
`c_tol_ratio`	0.3
`f_res_hz`	9000
`f_res_tol_hz`	1000
`r_res_ohm`	1000
`lcsc`	C3812435
`piezo.Murata 7BB-20-6L0` Murata, Product Search Data Sheet 7BB-20-6L0 (last updated 03/18/2022), Specifications: Resonance Frequency 6.3kHz ±0.6kHz, Resonant Impedance (R1) 1000Ω, Capacitance 10nF ±30% [1kHz], plate 20 mm, with lead wire – via LCSC C3812354 (https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2308111423_Murata-Electronics-7BB-20-6L0_C3812354.pdf), read 2026-10-31 · tag r
`c_f`	1e-08
`c_tol_ratio`	0.3
`f_res_hz`	6300
`f_res_tol_hz`	600
`r_res_ohm`	1000
`lcsc`	C3812354
`piezo.Murata 7BB-27-4L0` Murata, Product Search Data Sheet 7BB-27-4L0 (last updated 03/18/2022), Specifications: Resonance Frequency 4.6kHz ±0.5kHz, Resonant Impedance (R1) 300Ω, Capacitance 20nF ±30% [1kHz], plate 27 mm, with lead wire – via LCSC C3812333 (https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2308111422_Murata-Electronics-7BB-27-4L0_C3812333.pdf), read 2026-10-31 · tag r
`c_f`	2e-08
`c_tol_ratio`	0.3
`f_res_hz`	4600
`f_res_tol_hz`	500
`r_res_ohm`	300
`lcsc`	C3812333
`microphone.CUI CMA-4544PF-W` CUI Devices, CMA-4544PF-W data sheet (date 08/05/2022), p. 1 Specifications: sensitivity −46/−44/−42 dB (f = 1 kHz, 1 Pa, 0 dB = 1 V/1 Pa), operating voltage typ 3, max 10 Vdc, output impedance 2.2 KΩ, current consumption max 0.5 mA (Vs = 3.0 Vdc, RL = 2.2 KΩ); Measurement circuit RL = 2.2 KΩ, C = 1 µF – via LCSC C3273770 (https://datasheet.lcsc.com/datasheet/pdf/fd981bcd47575ad0c107e2f435ac6445.pdf), read 2026-10-31 · tag r
`rl_ohm`	2200
`z_out_ohm`	2200
`sensitivity_db`	-44
`sensitivity_tol_db`	2
`v_op_v`	3
`v_max_v`	10
`i_max_a`	0.0005
`lcsc`	C3273770
`microphone.INGHAi GMI9767P-42DB` Dongguan Inghai Electronics, specification for approval GMI9767P-42DB, edition V1.2 (2019-12-27), B. Specification (test condition RL = 2.2KΩ, VS = 4.5V): sensitivity −42±3 dB at 1 kHz (the table writes 0dB = 1V/ubar, the note under it says the sensitivity is given in Pa as the IEC recommends – the description line reads −42dB), standard operating voltage 4.5 V, output impedance ≤ 2.2 KΩ, max operating voltage 10 V, max current consumption ≤ 0.5 mA; E. Measurement circuit RL = 2.2KΩ (external resistor) – via LCSC C234018 (https://datasheet.lcsc.com/datasheet/pdf/4fcfde76b62ab9a9803b1e786efdb91f.pdf), read 2026-10-31 · tag r
`rl_ohm`	2200
`z_out_ohm`	2200
`sensitivity_db`	-42
`sensitivity_tol_db`	3
`v_op_v`	4.5
`v_max_v`	10
`i_max_a`	0.0005
`lcsc`	C234018
`microphone.INGHAi GMI4015P-2C-42db` LCSC's product sheet GMI4015P-2C (立创商城, no revision or date; images, read from them): p. 2 table – sensitivity −34 ~ −44 ±3 dB for the series (0 dB = 1 V/Pa; the variant's −42 dB is in its part number only, so not entered), standard operating voltage 2.0 V, output impedance ≤ 2.2 KΩ, max operating voltage 10 V, max current consumption ≤ 0.5 mA; p. 1 measurement circuit RL = 2.2K – https://datasheet.lcsc.com/datasheet/pdf/a5e7e595b6c59fa60dc7b09d19ffece8.pdf, read 2026-10-31 · tag r
`rl_ohm`	2200
`z_out_ohm`	2200
`v_op_v`	2.0
`v_max_v`	10
`i_max_a`	0.0005
`lcsc`	C233292

`tables/buses.toml`

termination and idle bias of RS-485 and CAN buses

Source: TI application reports SLLA272D and SLOA101B · tag r

`rs485` TI SLLA272D, The RS-485 Design Guide (February 2008, revised May 2021), 6 Bus Termination and Stub Length: 'the cable trunk is commonly terminated with 120-Ω resistors, one at each cable end'; 7 Failsafe: 'VAB = 200 mV + VNoise', and 4 Signal Levels: 'standard conform receivers detect a differential input down to 200 mV' – https://www.ti.com/lit/pdf/slla272 · tag r
`termination_ohm`	120
`idle_min_v`	0.2
`can` TI SLOA101B, Introduction to the Controller Area Network (CAN) (August 2002, revised May 2016), 6: 'terminated at both ends with 120-Ω resistors, which match the characteristic impedance of the line' – https://www.ti.com/lit/pdf/sloa101 · tag r
`termination_ohm`	120

`tables/derating.toml`

margins of the limits on declared ranges (G) and simulated values (E)

Source: edakit handbook 5.3 (derating.p of sim.json, the margins pytree kept) · tag r

`G.factor`
`capacitor`	1.5
`diode`	1.5
`led`	1.0
`npn`	1.5
`pnp`	1.5
`nmos`	1.5
`pmos`	1.5
`njfet`	1.5
`pjfet`	1.5
`E.derate`
`p`	0.5
`i`	0.8
`v_cap`	0.67
`v_diode`	0.67
`v_bjt`	0.67
`E.criteria`
`net_range_tol_v`	0.05
`led_on_min_a`	0.001
`led_on_min_ratio`	0.8
`led_off_max_a`	1e-05
`chain_min_ratio`	0.7
`blocking_max_a`	0.001
`rail_tol`	0.03
`tj_max_c`	125
`pin`
`v_min_v`	-0.3

`tables/i2c.toml`

I2C pull-up sizing, Standard mode

Source: NXP UM10204 Rev. 7.0 (2021), 7.1 and table 10 · tag r

`pullup` NXP UM10204 Rev. 7.0 (2021), 7.1 Pull-up resistor sizing · tag r
`sink_a`	0.003
`vol_v`	0.4
`r_max_ohm`	10000
`rise` NXP UM10204 Rev. 7.0 (1 October 2021), 7.1 Pull-up resistor sizing, p. 50 · tag r
`factor`	0.8473

`tables/iec62368.toml`

energy source class limits of IEC 62368-1 by which edakit recognises hazardous voltage

Source: W. Zhang, T. LaBella: Demystifying clearance and creepage distance for high-voltage end equipment, TI Power Supply Design Seminar, SLUP421, slide 'Insulation grade guidelines': '60 V – ES1 limit', '120 V – ES2 limit' (IEC 62368-1) – https://www.ti.com/lit/pdf/SLUP421, read 2026-10-31 · tag r

`es1`
`dc_v`	60
`es2`
`dc_v`	120

`tables/ipc2221.toml`

external layer track width from current: A[mil²] = (I / (k · ΔT^b))^(1/c)

Source: IPC-2221 (2012), 6.2 conductor width and figure 6-4 · tag r

`outer` IPC-2221 figure 6-4 (external conductors), the fit of its curves · tag r
`k`	0.048
`b`	0.44
`c`	0.725
`dt_k`	10
`reserve`	1.5
`mil_per_oz`	1.378

`tables/jlcpcb.toml`

JLCPCB 2-layer FR-4, 1 oz: holes, rings, spacings

Source: JLCPCB PCB capabilities page (read 2026-10), as noted per row · tag r

`hole` JLCPCB capabilities: drill hole size tolerance, plated slot width · tag r
`tol_mm`	0.08
`play_mm`	0.05
`slot_twist_mm`	0.1
`slot_min_mm`	0.5
`ring` JLCPCB capabilities: annular ring, hole-to-hole spacing · tag r
`pth_min_mm`	0.18
`pth_warn_mm`	0.2
`via_min_mm`	0.05
`pad_gap_mm`	0.45
`via_gap_mm`	0.2

`tables/radio_eu.toml`

EU licence-exempt bands (MHz) and, where the limit is an e.i.r.p., the band's highest limit in mW

Source: BNetzA Vfg. 91/2025 (November 2025) and Vfg. 136/2022 as amended by Vfg. 49/2023 · tag r

`tables/usb.toml`

USB Type-C sink termination

Source: USB Type-C Cable and Connector Specification (USB-IF); Richtek AN064 (2021) · tag r

`cc` USB Type-C Cable and Connector Specification (USB-IF): sink termination Rd = 5.1 kΩ ± 10 % · tag r
`rd_ohm`	5100
`rd_tol`	0.1
`termination`	['rd_5k1', 'controller', 'none']
`budget` Universal Serial Bus Specification Revision 2.0 (April 27, 2000), 7.2.1: 'A unit load is defined to be 100 mA' … 'may draw up to five unit loads after being configured' – https://www.usb.org/document-library/usb-20-specification · tag r
`unit_load_a`	0.1
`high_power_a`	0.5
`typec_current` USB Type-C Cable and Connector Specification Release 2.0 (August 2019), 2.3.4 'USB Type-C VBUS Current Detection and Usage' and Table 2-1 – https://www.usb.org/document-library/usb-type-cr-cable-and-connector-specification-release-20 · tag r
`default_usb2_a`	0.5
`default_usb32_a`	0.9
`rp_1a5_a`	1.5
`rp_3a0_a`	3.0
`attach` Universal Serial Bus Specification Revision 2.0 (April 27, 2000), 7.2.4.1 Inrush Current Limiting – https://www.usb.org/document-library/usb-20-specification · tag r
`c_max_f`	1e-05
`droop_max_v`	0.33

Written by docs/catalog/build.py; tests/test_catalog_page.py holds it to the catalog.