The intercom phone introduced in this article was modified with a clearance telephone stand. This machine has good effect and can be used as short-distance communication equipment for industrial and mining enterprises and families. This article refers to the address: http:// Figure 9.47.1 is the wiring diagram of the telephone. The buzzer in the figure can be made by itself.
Aluminum substrate is a metal-based copper clad laminate with good heat dissipation function. Generally, a single-sided panel consists of three-layer structure, which are circuit layer (copper foil), insulating layer and metal base layer,and are usually used in products that require heat dissipation, such as solar energy,Led light etc.
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