Partner Sign InFrequently Asked Questions
General
- SPL Calculator for Distance
- Wave solder profile
- Reflow profile
- How does PUI Audio's part numbering system work?
- Does PUI comply with the RoHS requirements?
- Does PUI Audio use any of the chemical substances listed in the European Union's REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) list?
- Our Product Availability Statement
Benders
Indicators / Sirens
- What tones are available?
- How are they constructed?
- What are the mounting options for indicators and sirens?
Transducers
- What are the mounting options for transducers?
- What are some suggested drive circuits for transducers?
- How are they constructed?
Microphones
- What mounting options are available for PUI Audio microphones?
- What is the temperature range of PUI Audio microphones?
- How do you solder to microphones?
- What is the difference between omni, uni and noise canceling?
Speakers
- What mounting options are available for PUI Audio speakers?
- What cone materials are available?
- How is SPL measured for PUI Audio speakers?
General
SPL Calculator for Distance
| From: | To: | Add: |
|---|---|---|
| 20 cm | 10 cm | 6 dB |
| 30 cm | 10 cm | 10 dB |
| 60 cm | 10 cm | 16 dB |
| 100 cm | 10 cm | 20 dB |
Wave solder profile
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Reflow profile
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How does PUI Audio's part numbering system work?
Projects Unlimited has adopted a "Smart Part Numbering System" that includes the device's parameters. This allows you to identify the device type, size, voltage, frequency and so on just by reviewing the part number. Note: The “Smart Part Numbering System” does not apply to all parts.
Back to topDoes PUI comply with the RoHS requirements?
After the European Union passed the “Restriction of the use of certain hazardous substances in electrical and electronic equipment”, commonly known as “RoHS” legislation 2002/95/EC, PUI Audio has worked diligently to comply with the RoHS requirements.
Back to topDoes PUI Audio use any of the chemical substances listed in the European Union's REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) list?
With the increasing concerns of hazardous substances in our environment, we would like to inform you that our products do not contain any of the chemical substances listed below per the European Union's REACH Substance of Very High Concern (SVHC) candidate list.
Back to topOur Product Availability Statement
Back to topBenders
How are benders constructed?
3D Exploded Bender Diagram (PDF)
Back to topWhat is a feedback?
The ceramic can be configured with or without a feedback. The feedback is used in conjunction with an external circuit, see figure 1, to monitor the operation of the piezo bender and adjust the input signal to maintain a consistent output frequency. The resultant effect is an output with higher sound pressure level (dBA) and lower distortion due to frequency drift.
Feedback Circuit Diagram (PDF)
Back to topHow do you solder them?
Bender Soldering Process (PDF)
Back to topIndicators / Sirens
What tones are available?
Continuous, Fast pulse, Slow pulse, Siren, Warble, Chime, Multiple
Back to topHow are they constructed?
Exploded Indicator Diagram (image)
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What are the mounting options for indicators and sirens?
Surface mount, Thru-hole, Flange mount, Panel mount, Bracket
Back to topTransducers
What are the mounting options for transducers?
Surface mount, Thru-hole, Flange mount, Panel mount
Back to topWhat are some suggested drive circuits for transducers?
Transducer Drive Circuit Explanation (PDF)
Back to topHow are they constructed?
Exploded Transducer Diagram (image)
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Microphones
What mounting options are available for PUI Audio microphones?
Pin, Solder Pad, Bullseye
Back to topWhat is the temperature range of PUI Audio microphones?
Operating: -20C ~ +70C, Storage: -40C ~ +85C
Back to topHow do you solder to microphones?
Lead Free Mic Soldering Explanation (PDF)
Back to topWhat is the difference between omni, uni and noise canceling?
Microphone Directionality (PDF)
Back to topSpeakers
What mounting options are available for PUI Audio speakers?
Surface mount, Thru-hole, Flange
Back to topWhat cone materials are available?
Paper, Mylar, Cloth, Treated Paper
Back to topHow is SPL measured for PUI Audio speakers?
Speaker Power and Distance (PDF)
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