MitchElectronics
Micro Audio Amp
£6.99
18 items in stock
Need to amplify a small audio signal to play on an external speaker? The Micro Audio Amp can definitely help with that! RoHS compliant, REACH compliant, and perfect for beginners.
- Product Code
- MAUDIOAMP
- Manufacturer
- MitchElectronics
- Manufacturer Part Number
- MAUDIOAMP
- Category
- Blue Kits
- Country of Origin
- United Kingdom
RoHS: YesREACH: YesCE: YesUKCA: Yes
Overview
Product Description
The Micro Audio Amp is a miniature audio amplifier based on the LM358 operational amplifier and uses a secondary push-pull amplifier for driving external speakers. Audio signals can be fed into the AUDIOIN pin, and the potentiometer provides a variable gain control. While the output of this kit is directly connected to a small speaker for testing purposes, it can easily be modified with an external connector for use with larger speakers (such as RCA connectors). This kit can also be connected to other MitchElectronics audio projects, such as the 555 Astable and the 555 Synth Punk, for amplification purposes.
Resources
Instructions & Documentation
Technical
Product Specifications
- Assembly
- Kit form
- Prebuilt
No
- Battery Type
- 9V PP3
- PCB Dimensions
- 48mm x 34mm
- Mounting Holes
Yes
- Battery Powered
Yes
- Component Count
- 18
- Battery Included
No
- Operating Voltage
- 5V to 16V
- Operating Frequency
- N/A
- Mounting Hole Details
- 4 x M4 (40mm x 26mm)
In the box
Included With This Product
| Name | Quantity | Reference |
|---|---|---|
| 8 DIP Socket | 1 | U1 |
| LM358 | 1 | U1 |
| 100Ω Resistor | 1 | R6 |
| 1KΩ Resistor | 6 | R1, R2, R4, R5, R7, R8 |
| 10KΩ Resistor | 1 | — |
| 100KΩ Potentiometer | 1 | R3 |
| 100µF Capacitor | 2 | C1, C2 |
| 1N4148 Diode | 2 | D1, D2 |
| 2N3904 BJT | 1 | Q1 |
| 2N3906 BJT | 1 | Q2 |
| Speaker | 1 | LS1 |
| Red Wire | 2 | VCC, LS1 |
| Black Wire | 2 | GND, LS1 |
| Green Wire | 1 | AUDIO IN |
| Blue Wire | 1 | AUDIO OUT |
| Micro Audio Amp PCB | 1 | — |
More information
Applications
- The design of this kit has been chosen to demonstrate multiple circuit configurations, including inverting amplifiers with a virtual ground, AC coupling, and push-pull transistor amplifiers with cross-over bias. As such, the Micro Audio amp is an excellent kit for use in educational environments such as classrooms and remote practicals.
- The Micro Audio Amp can also be used as an AC amplifier, enabling for the amplification of weak AC signals. One such example would be IR sensors that need to ignore constant IR emissions (such as those from the sun), and only react to sudden changes in IR emissions (such as remote controls).
- Education and training – Useful for teaching audio amplification, small-signal amplifiers and speaker driving, while providing practical experience with through-hole soldering, component identification and PCB assembly.
More information
Notes
- Electrical specifications are nominal and may vary with component tolerances, supply voltage, load and operating conditions.
- The product is supplied in kit form and requires soldering and assembly before use.
- Check component values and observe the polarity or orientation of ICs, diodes, LEDs, transistors and electrolytic capacitors before applying power.
- A 9V PP3 battery is not included.