LM-386 audio amplifier DIP-style package. Note the optional circuit board connections (jumpers), amortization and-l’accent is ideal for use with (two lanes) shows the receptors of radio communications. Connect a 1K) 8-ohm matching transformer (in reverse order of the circuit, an airline pilot () balanced or unbalanced output.
If the amplifier with a polarity reverse to the impedance matching transformer at the same time, it would be desirable to reduce some heavy padding resistive (damping) to step up voltage transformer-up. (Actually, I just wanted the word “caution” somewhere …) I did a lot of audio line driver circuit with the LM-386. The type of transformation may be almost entirely practical. The output transformer wire winding can be both balanced and UN-Balenced outputs.
Switching capacity of 386-lm-circuit with a PNP type transistor for audio with a receiver gating COS / logical line horn. Wilson has used the brand’s original two-way VHF radios that approach. Another method involves muting (primary) shunt volume pot wiper.
audio amplifier with LM386
The diagram shows an initial stereo headphone amplifier, you are welcome to build a single course, SM-386-audio circuit. The package contains the download full-screen configuration option EQ. Jumper several options you can adjust the frequency response as shown below. The EQ gif image below is the much lower resolution and reduce the actual text Download gif provided.
Although the circuit shown works with 6 volts DC, modern lm-386 packages and can operate with voltages of up to 9 hours to 12 hours volts DC. Make sure when you order the chip, or take the maximum operating voltage is 9 VDC. Some suppliers are “sub” package, the lowest voltage in your order, if you say something.
Another idea is to drive SM-386 to a high frequency audio source, such as audio oscillator circuit 555 on the healthy side. The audio output of the LM-386 and can be adjusted to filter DC. Quite nice, if you’re negative power of a poor man must be based on a route. I used this idea in the era of the late 1970s, the computer circuitry to generate a negative supply rail to a former type is EPROM.
This download file is in zip format, but you can size smaller and a gif file image resolution (see above) on this page with the description. Feel free to e-mail if you have any questions.
