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Options exist. Single-step button (SW13) isn't producing a high enough voltage to trigger steps. Replace C10 with 100K resistor, and bridge out R44 with a 7-segment display with LED backlight 160x104 RS-232 I2C or SPI TFT-graphic display 320x240 16 bit colour TFT-graphical display 800x480 16-bit colours and touch display STN/FSTN LCD 128x64 dot https://www.digchip.com/datasheets/parts/datasheet/1121/AG-12864E-pdf.php AG12864E Graphics Display 192x64 2 Digit 7 segemnt blue LED, right hand decimal, https://docs.broadcom.com/docs/AV02-1588EN 2 digit 7 segment green -1 overflow 7 segment green LED, http://www.kingbrightusa.com/images/catalog/SPEC/CA56-12SRWA.pdf 4 digit 7 segment orange LED One digit 7 segement super bright yellow LED with photo IC package for Omron G6H-2F relais, see http://cdn-reichelt.de/documents/datenblatt/C300/G6H%23OMR.pdf Omron G6K-2F relay package http://omronfs.omron.com/en_US/ecb/products/pdf/en-g6k.pdf Relay Omron G6SK-2G, see http://omronfs.omron.com/en_US/ecb/products/pdf/en-g6s.pdf Relay Omron G6S-2, see http://omronfs.omron.com/en_US/ecb/products/pdf/en-g6s.pdf Fujitsh FTR B3S B3SA Relay J JLeg IM Signal Relay DPDT FRT5 narrow footprint Finder 32.21-x000 Relay, SPDT, High Capacity, https://omronfs.omron.com/en_US/ecb/products/pdf/en-g2rl.pdf Omron Relay, SPST, https://gfinder.findernet.com/assets/Series/355/S32EN.pdf Finder 32.21-x300 Relay SPST Schrack-RP-II/1 RM3.5mm 8A 250V AC Relay Relay SPST Schrack-RT1 RM5mm 8A 250V AC Relay Relay SPST Schrack-RP-II/1 RM3.5mm 8A 250V AC Form C http://image.schrack.com/datenblaetter/h_rt114012--_de.pdf Relay SPST Schrack-RP-II/1 RM3.5mm 8A 250V AC Form A http://www.alliedelec.com/m/d/543c6bed18bf23a83ae5238947033ee0.pdf Relay SPST Schrack-RP-II/1 RM5mm 16A 250V AC Relay Relay SPST Schrack-RT1 RM3.5mm 8A 250V AC Relay Standex-Meder SIL-relais, Form 1B, see https://standexelectronics.com/wp-content/uploads/datasheet_reed_relay_SIL.pdf Standex Meder DIP reed relay Standex-Meder SIL-relais, Form 1A/1B, see https://standexelectronics.com/de/produkte/ms-reed-relais/ Standex Meder SIL reed relais Standex-Meder SIL-relais, Form 1A, see https://standexelectronics.com/wp-content/uploads/datasheet_reed_relay_SIL.pdf Miniature PCB Relay, PCH Series, 1 Form A http://image.schrack.com/datenblaetter/h_rp810012-b.pdf Relay SPST Potter&Brumfield T9AP1D52 12V 30A 1xUn Connector Fast ON Only Dummy for Space NO Pads Relay RAYEX L90S SPDT relay Sanyou SRD series Form A (NO), SPST http://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Data+Sheet%7FPCH_series_relay_data_sheet_E%7F1215%7Fpdf%7FEnglish%7FENG_DS_PCH_series_relay_data_sheet_E_1215.pdf Relay socket DPDT Finder 40.31, Pitch 3.5mm/7.5mm, https://www.finder-relais.net/de/finder-relais-serie-40.pdf.

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