51 lines
3.4 KiB
Plaintext
51 lines
3.4 KiB
Plaintext
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I.C.s are LM 386s Input (small 8ohm Batteries are 9V
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8 pin dip 1/2 Watt amp. speaker works ok) 'Transistor radio' type.
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10K^ /<2F> 10K^
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<20><>/\/\/\/\<5C><><EFBFBD><EFBFBD><EFBFBD>< <20> <20><>/\/\/\/\<5C><><EFBFBD>Ŀ
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MOUTHPIECE <20> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><>\<5C> <20> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20> EARPIECE
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<20> <20> +9Vdc <20> <20> +9Vdc
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<20><><EFBFBD><EFBFBD><EFBFBD>Ŀ2 <20>9 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>)<29><><EFBFBD>O <20> <20><><EFBFBD><EFBFBD><EFBFBD>Ŀ2 <20>9 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>O
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<20> _<>____<5F>_ <20>Ĵ<EFBFBD><C4B4>Ĵ 100uf <20> <20> _<>____<5F>_ <20>Ĵ<EFBFBD><C4B4>Ŀ 100uf
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<20><><EFBFBD><EFBFBD><EFBFBD>\4 6/<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 10uf<75> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD>\4 6/<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 10uf<75>
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<20> f \ 1/<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD>Ŀ <20> <20> <20> f \ 1/<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD>Ŀ <20>
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<20><><EFBFBD><EFBFBD>Ĵ<EFBFBD><C4B4><EFBFBD><EFBFBD>\ /<2F><>/\/\/\/\Ĵ <20> <20> <20><><EFBFBD><EFBFBD>Ĵ<EFBFBD><C4B4><EFBFBD><EFBFBD>\ /<2F><>/\/\/\/\Ĵ <20>
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<20><><EFBFBD>Ŀ 7 \/ 8 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20> <20> <20> 7 \/ 8 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20>
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20> <20> 5 1.5K^ <20><><EFBFBD><EFBFBD><EFBFBD> <20> <20><><EFBFBD><EFBFBD><EFBFBD> <20> 5 1.5K^ <20><><EFBFBD><EFBFBD><EFBFBD>
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<20><><EFBFBD> <20> <20> <20><><EFBFBD> <20> <20><><EFBFBD> <20> <20><><EFBFBD>
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<20> <20> __<5F>__ <20> <20> <20> __<5F>__ <20>
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<20> <20><><EFBFBD><EFBFBD><EFBFBD> 200 uf <20> <20><><EFBFBD><EFBFBD><EFBFBD> 200 uf
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<20> <20> <20> <20>
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<20> <20> <20> <20><><EFBFBD><EFBFBD><EFBFBD>> To earphone.
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<20> <20> <20> (directly to an 8ohm load)
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<20> <20> <20> 1/2 Watt
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<20> <20> Signal (+) side <20> (recommend smal earphone)
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>)<29><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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<20> <20> Two lead telephone cable <20> <1E> (pretty poor Zener
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<20> <20> strung with parallel circuitry <20> huh?)
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<20> <20> in mind. <20> 6V
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<20> <20> <20>
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>(<28><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>)<29><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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Ground (common side) <20> Sb <20>۳Piezo buzzer <20> (3-12V) <20>
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<20><><EFBFBD><EFBFBD>O O<><4F><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><C4B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>)<29><>Ŀ <20>
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<20><><EFBFBD><EFBFBD><EFBFBD> <20> <20>۳ <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><> NPN <20>
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Push "Sb" to make <20> <20><>/\/\/\/\<5C><><EFBFBD>ij<EFBFBD> (general <20>
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EVERY FLIPPIN' BODYS O +9Vdc <20><><10> purpose) <20>
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buzzer go off. Yup, This ^ <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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is a party line. Gotta play with this value
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depending on the buzzer. If
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The 1.5K ohm pot on pin 8 and the you want to be fancy, use a logic
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cap on pin 1 form a method of adjusting gate.
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the "GAIN" of the amplifier from about 20
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to about 200. (I used a single section like this in one of the local
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churches for the hard of hearing. I ran them off an amplifier used by the
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pastor. When the pastors amplifier was shut off and when adjusted to max,
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they kept complaining about picking up PBS.)
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The 10K ohm pot on the inputs (pin 9) is what you use as the "VOLUME"
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control.
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Transposing this stuff to ASCII aint the easiest thing I've ever done,
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so don't be surprized if I made some mistakes. (I'd be surprized if I
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didn't). If (when) you find any, please NET-MAIL me or .TIC me the
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correction(s). (9:1992/209 or 1:132/209) Thanks. I hope this helps.
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