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electronic:lcd:f4528 [2026/09/26 08:09] – tonyelectronic:lcd:f4528 [2026/09/26 08:10] (current) – tony
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-===== Additional info =====+===== Datasheets =====
   * {{:electronic:datasheet:promax-johnton:pj31002.pdf|Promax-Johnton PJ31002}} Tone ringer for telephone set.   * {{:electronic:datasheet:promax-johnton:pj31002.pdf|Promax-Johnton PJ31002}} Tone ringer for telephone set.
   * {{:electronic:datasheet:unisonic:mc34018.pdf|Unisonic MC34018}} Voice switched speaker phone circuit.   * {{:electronic:datasheet:unisonic:mc34018.pdf|Unisonic MC34018}} Voice switched speaker phone circuit.