The 2SC1061 is a NPN Power Transistor in To-220 package. It has a DC current gain from 35 to 320 and transition frequency of 5MHz. It is commonly used in high power amplifier application along with its complementary PNP part 2SA671.
The HA17324A is a quad operational amplifier that provide high gain and internal phase compensation, with single power supply. 14 Pin DIP Package. It can be widely used to control equipment.
The AD7175-2 is a low noise, fast settling, multiplexed, 2-/4- channel ADC for low bandwidth inputs. It has a maximum channel scan rate of 50 kSPS (20 µs) for fully settled data. The output data rates range from 5 SPS to 250 kSPS
The 2SK1937-01, 2SK-1937, K1937, 1937 is a 500V 15A 125W N-Channel Power MOSFET, High Speed Switching - Low On-Resistance - No Secondary Breakdown - Low Driving Power - High Voltage - VGS = ± 30V
This is a thermal printer like you would find on a cash register or adding machine. It will print simple strings passed to it via TTL serial, bitmap images (poorly) and it can generate several different formats of barcodes.