Quantity   Component name
1 × DAC8814 4-channel 16-bit DAC
1 × LTC2326-16 16-bit, 250 ksps ADC
3 × AD8676 or OPA2227 low-noise dual op-amps
2 × OPA4227 low-noise quad op-amps
1 × LT1469 dual op-amp
1 × REF102 precision 10V reference
1 × OPA124 low bias current op-amp
1 × Teensy 3.1
1 × ±15V, +5V and +3.3V linear regulators
3 × 1/4"-80 adjustment screws McMaster Carr part # 97424A590
3 × 1/4"-80 threaded bushings McMaster Carr part # 98625A960
1 × ~30 AWG tunsten wire for STM tips
1 × piezo buzzer I use Digikey part # 490-7711-ND
1 × HOPG samples Digikey part # 1168-1754-ND