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Here are the design specs for making your own acoustic amplifiers.
Teensy amplifier board piezo_dispenseramplifier_hts4_bom1.zip
HTS Resources Piezo Dispenser Amplifier HTS4 PARTS LIST 05/17/17 Product Description: Single Channel Piezo Dispenser Amplifier Board
|Description|Ref|QTY|Mfg/Supplier Part #|Mfg/Supplier|Cost ea.|Total|
HTS4 Rev A | NA | 1 | PCB | PAD | 25.00 | 25.00 |
Capacitor | A1 | 1 | OPA454A/DDA | Texas Instuments/Digi-Key | 6.38 | 6.38 |
Capacitor | C2 | 1 | GRM21AR72A224KAC5K (0.22uF 100V X7R 10%) | Murata/Digi-Key | 0.15 | 0.15 |
Capacitor | C1 | 1 | GRM21BR71H104KA01L (0.1uF 50V X7R 10%) | Murata/Digi-Key | 0.05 | 0.05 |
Resistor | R3 | 1 | ERJ-6ENF2204V (0805 2.2M 1%) | Panasonic/Digi-Key | 0.02 | 0.02 |
Resistor | R1 | 1 | ERJ-6ENF4751V (0805 4.75K 1%) | Panasonic/Digi-Key | 0.02 | 0.02 |
Resistor | R2 | 1 | ERJ-6ENF1213V (0805 121k 1%) | Panasonic/Digi-Key | 0.02 | 0.02 |
Terminal Strip | TS4,5,6,7 | 4 | TSW-114-23-L-S-LL | Samtec | 0.83 | 3.32 |
Terminal Strip | TS2,3 | 2 | TSW-105-23-L-S-LL | Samtec | 0.34 | 0.68 |
Terminal Strip | TS1 | 1 | TSW-106-23-L-S-LL | Samtec | 0.39 | 0.39 |
Test Point | NA | 2 | 1249 | Keystone/Digi-Key 0.14 | 0.28 | |
Microcontroller | U1 | 1 | Teensy 3.2 | Digi-Key | 22.50 | 22.50 |
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Power supply board