Sound Amplifier with Stereo Headphone Output
It strongly amplifies voices, sounds and noises picked up in the room by a microphone capsule and makes them audible through a stereo earphone. It can also be used as a hearing aid.
SKU 7100-FK019EAN 5410329216283Item type: Assembled, KitAudio systems, Educational kits
Description
| This kit builds a microphone amplifier with an output suited to stereo headphones. With the kit you can amplify any sound present in the room, from a voice to the ordinary noise of objects and/or music, and listen to it amplified on the headphone output. The gain can also be adjusted with trimmer RP1 to obtain the volume you want. The device has no frequency filtering, so any sound will be amplified. Soldering is required for assembly. The kit is supplied complete with stereo earphones and with assembly instructions.
|
| Circuit diagram |
 |
| How it works |
| You may find yourself in situations where your own hearing is not enough, or where you want to listen to a noise coming from some distant spot, or to a voice from far away; in cases like these a device such as the FK019 can come in handy. The circuit consists essentially of a microphone that picks up the sound, which is then amplified by a transistor stage and amplified again to the right level so that it can be listened to through ordinary headphones plugged into the 3.5 mm “Audio out” jack socket. The volume is adjusted with trimmer RP1. The device has to be powered by a CR2032 button cell. Power can then be switched on and off at any time with switch S1, so that the unit is used only when needed and the battery lasts longer. |
| Technical specifications |
|
You may also like…
-
Non-rechargeable batteries
Related products
-
Educational kits -
Educational kits -
Educational kits2×5 W Amplifier with Bluetooth and Battery Power – assembled
€8.61excl. VAT€10.50incl. VAT -
Audio systems -
Audio systems -
Headphones & earphones -
Educational kits -
Headphones & earphones