Main components

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Part NumberDescription
74LS07Hex Buffers and Drivers With Open Collector High Voltage Outputs
tc74hc21ap
74HC04Hex Inverter
74HC00
74HC02quad 2-input NOR gate
NJM4558Dual Operational Amplifier, DIP-8/DMP-8/SIP-8/SOP-8/SSOP-8
NMA0515SC+/-33mA Isolated 1W Dual output DC/DC Converter Module, 5V Input Voltage, +/-15V Output Voltage, SIP3

ultra seigyo schematic

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ultra seigyo board layout