Schematics > Miscellaneous > Intercommunication (Intercom)
Intercommunication (Intercom)This is a great intercom circuit that can be used in many ways. It uses 22V
to operate and maybe it will work at a lower voltage (you can try it). For input/output
it uses a loundspeaker (20-45 Ohm) on each side.
Click to enlarge
Componets Layout
PCB
Parts List
| R1: 2,2 M |
|
C6: 200uF/40V |
| R2: 10 Ohm |
|
IC1: PA234 |
| R3,R6: 100K |
|
LS1,2: 20-45 Ohm |
| R4: 22K |
|
T1: 2N3391 (BC383) |
| R5: 1M |
|
P1: 5K |
| C1: 0,2uF |
|
S1: SW-DPDT * |
| C2: 0,02uF |
|
|
| C3: 0,001uF |
|
|
| C4: 0,05uF |
|
|
| C5: 100uF/40V |
|
|
*
See here how the SW should be. See also the large theoritical image.
Title: Intercommunication (Intercom)
Source: www.electronics-lab.com
Published on: 2005-02-10
Reads: 488
Print version:  Other schematics from Miscellaneous
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