(10) 2N7002 N-Channel MOSFET Datasheet – On Semi Īppendix A – Characteristics of piezo used in this experiment (9) MPF102 JFET VHF Amplifier N−Channel Depletion (VGS(off) -8V Datasheet) – On Semi 2006 (8) Comparing MOSFETs with BJT Transistors – Pros and Cons (Update – nowadays cheap, can trigger at 3V/5V TTL logic level) – 2019jun17 (7) NTC (Negative Temperature Coefficient) Thermisters temperature sensor/transducer/in rush current limiter – Electronics Tutorials (6) AliEXpress NTC-5D7 Thermister (In rush current suppressor) (5) Piezo knock sensor circuit- Demo – Youtube 2013 (4) How to Build a Piezo Knock Sensor Circuit – Learning About Electronics 2013 (3) MCP3008 SPI 8 Channel 10 Bit ADC Datasheet – MicroChip (2) Piezo Pickup Transducer 27mm Contact Microphone Trigger – Discs Elements for Acoustic Instrument: Guitar, Drum, CBG etc. (1) tlfong01’s piezo experiment, Rpi SE 2019 You can use a zener to clamp the spike, and NTC inrush current supressor to limit current. The voltage spike might be as high as 30V. How to protecting circuit from piezoelectric disc voltage spike You might like to read my measurement of piezo spike with and without the protective zener: “Piezo sensor to pick up acoustic instrument signal using Rpi and ADC Asked 1 year ago Active 1 year ago Viewed 569 times”: /questions/103868/….But I found that zener is not very effective. – tlfong01 8 hours ago the usual quick and dirty trick is to use a zener diode.1If you define your design specs in good detail and any component spec links, then a good answer is possible – Tony Stewart Sunnyskyguy EE75 10 hours ago.otherwise a step up pulse transformer can be attempted for Tx with a high side PNP current source then an NPN clamp clamp to gnd with a small deadtime using a half bridge BJT driver. – Tony Stewart Sunnyskyguy EE75 10 hours ago So adding a series resistor makes that less sensitive for the transmission pulse. 1If you want to transmit a SONAR pulse to get the piezo to ring strong, you want to have a HV transistor to drive it high then open and ring then clamp shut to 0V to discharge the energy fast (blanking) pulse then the Rx echos can be measured except for the tbd xxx ns or us delay time to stop transmitting the ringing pulse.5No, you wouldn’t use a voltage regulator you’d use a series current limiting resistor. – Andy aka 11 hours ago.voltage-regulator attiny piezo attiny85 share edit follow flag asked 11 hours ago mj_ 30922 silver badges77 bronze badges In an application with a piezoelectric device, should I use a voltage regulator on the output of the piezo, and would that protect my circuit on the other side? I want to connect it to an ATTiny85 without frying the chip. I connected the disc to an oscilloscope and if I press very hard on the disc, I see that the voltage can spike pretty high. I have a piezoelectric disc, and I’m trying to use to build a primitive sonar. ( Leave a comment ) Protecting circuit from piezoelectric disc voltage spikeĪsk QuestionAsked todayActive todayViewed 73 times3.
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