Test a CD4017 Arduino sequence with compatible rails, defined clock and inhibit, deliberate reset, low-current indicators and one verified pulse per step.
Compare MCP4725 price in Pakistan and check DAC direction, twelve-bit scaling, supply reference, output load and EEPROM behavior before choosing a module.
Bring up an MCP23017 Arduino expander with supported input pins, safe latch initialization, consistent banking and coordinated interrupt capture and clearing.