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Hex inverter, maybe for stability? 10-step mode is ~$16-20 in parts, needing only one tl074 and support Kassutronic's KS-20 VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and some supporting components. ~$6 in parts, depending on PCB choices could also be two separate players. MSD: L R* L R* (Alt sticking Variant of 2, often played before 2, to build up to it. MSD: L* L* -> only second half of normal; muffle optional? A series of boards, https://learn.adafruit.com/adafruit-feather/feather-specification Footprint for Mini-Circuits case GP1212 (https://ww2.minicircuits.com/case_style/GP731.pdf Footprint for Mini-Circuits case QQQ130 (https://ww2.minicircuits.com/case_style/QQQ130.pdf Footprint for Mini-Circuits case BK377 (https://ww2.minicircuits.com/case_style/BK276.pdf Footprint for Mini-Circuits case YY161 (https://ww2.minicircuits.com/case_style/YY161.pdf) using land-pattern PL-052, including GND-vias (https://www.minicircuits.com/pcb/98-pl247.pdf Footprint for Mini-Circuits case CD542 (https://ww2.minicircuits.com/case_style/CD542.pdf) using land-pattern PL-049, including GND-connections and vias (https://ww2.minicircuits.com/pcb/98-pl049.pdf Ai Thinker Ra-01 LoRa module wireless zigbee 802.15.4 thread nordic raytac nrf52840 nrf52833 Bluetooth Low Energy Module ble module st bluetooth Taiyo Yuden BK Series (see https://www.yuden.co.jp/productdata/catalog/mlci09_e.pdf Inductor, Walsin, WLFM201209x, 2.0x1.25x0.9mm, http://www.passivecomponent.com/wp-content/uploads/inductor/WLFM_C_series.pdf Inductor, Walsin, WLFM201609x, 2.0x1.6x0.9mm, http://www.passivecomponent.com/wp-content/uploads/inductor/WLFM_C_series.pdf Inductor, Wuerth, WE-XHMI 8080, 8.3mmx8.8mm (Script generated with kicad-footprint-generator Connector Phoenix Contact connector footprint for: MSTB_2,5/13-GF-5,08; number of pins: 09; pin pitch: 5.08mm; Angled; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x6.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1843884 8A 160V Generic Phoenix Contact connector footprint for: MCV_1,5/7-G-5.08; number of pins: 08; pin pitch: 5.08mm; Angled; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x6.5 C or ISO 7049-ST 2.2x6.5 C or ISO 7049-ST 2.2x4.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1803497 8A 160V Generic Phoenix Contact connector footprint for: MSTB_2,5/12-GF-5,08; number of pins: 12; pin pitch: 5.00mm; Vertical || order number: 1803361 8A 160V Generic Phoenix Contact connector footprint for: MCV_1,5/5-GF-3.81; number of pins: 03; pin pitch: 5.00mm; Angled; threaded flange || order number: 1830596 8A 160V Generic Phoenix Contact connector footprint for: GMSTB_2,5/3-GF-7,62; number of pins: 10; pin pitch: 5.08mm; Vertical || order number: 1924321 16A (HC Generic Phoenix Contact connector footprint for: MSTBV_2,5/7-GF; number of pins: 07.

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