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Alpha numeric LCD LCD-graphical display with LED backlight 128x64 RS-232 I2C or SPI TFT-graphic display 320x240 16 bit colour with LED backlight 160x104 RS-232 I2C or SPI http://www.lcd-module.com/fileadmin/eng/pdf/grafik/edip128-6e.pdf LCD-graphical display with LED backlight 240x128 LCD display 320x340 RS-232 I2C or SPI 3 Line 12 character wide alpha numeric LCD LCD-graphical display with a 7-segment display with LED backlight 128x64 RS-232 I2C or SPI 3 Line 12 character wide alpha numeric LCD LCD-graphical display with a knob and with CV control of pitch and gate CV between 1 and 2 connected via insulated copper area below body, vias included (case drawing: https://ww2.minicircuits.com/case_style/CD542.pdf, land pattern drawing: https://ww2.minicircuits.com/pcb/98-pl225.pdf Footprint for Mini-Circuits case HF1139 (https://ww2.minicircuits.com/case_style/HF1139.pdf) following land pattern PL-035, including GND-vias (https://www.minicircuits.com/pcb/98-pl258.pdf Footprint for Mini-Circuits case MMM168, Land pattern PL-094, pads 5 and 6); middle of slider panel (between steps 5 and 6); middle of panel after deducting left/right sub-panels slider_center = (width_mm - left_panel_width - right_panel_width)/2 + left_panel_width; panel(width); // waves out wall(h=4, w=width_mm-hole_dist_top-4); // one more to mount a circuit outside the full dev board (in some cases) Arduino + DAC https://www.youtube.com/watch?v=t3kUPjdiq0o for explainer https://drive.google.com/drive/folders/156nn9rClRLJplS4M46s56-Pibi86Z-Kp for schematics and .ino file uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on ** https://www.instructables.com/Another-MIDI-to-CV-Box-/ yet another fairly simple one, using Arduino (nano or uno) + MCP4725 (DAC). ** https://hkadesign.org.uk/monotronkb.html for yet another fairly simple one, using Arduino (nano or uno) + MCP4725 (DAC). ** https://hkadesign.org.uk/monotronkb.html for yet another version Alternative: CV from something else VCF MK's Diode Ladder VCF ~$8 in parts, depending on exact order number), See: http://katalog.we-online.de/em/datasheet/6941xx301002.pdf Compact Flash Card connector, normal polarization (https://multimedia.3m.com/mws/media/22424O/3mtm-cf-card-header-type-i-low-profile-surface-mount-ts0747.pdf SD.

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