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Posts tagged 2N3055 MJ2955

2N3055 MJ2955 Schema and Layout for PA

2N3055  MJ2955 Schema and Layout for Audio

LEVEL METER DRIVER

7 DOT LEVEL METER DRIVER Audio circuit using KA2288 7 DOT LEVEL METER DRIVER circuit using KA2288 The KA2288 is a monolithic integrated circuit consisting of 7-dot LED level meter drives.  KA2288 employs a low noise comparator which provides 10dB lower noise in the LW, MW band than the previously mentioned LED drivers. FEATURES LED […]

Digital volume control circuit

Digital volume control circuit DUAL ELECTRONIC VOLUME CONTROL The KA2250 is a CMOS designed for electronization of dual volumes. It is suitable for M/C, car stereos. FEATURES Wide supply voltage range: Vdd=6V~12V (Backup is possible up to 4V) Attenuation can be controlled from 0dB to -66dB by 2dB/step. Controlling attenuation by means of the built […]

Echo Repeter and preamp mic schematic

Echo Repeter and preamp mic schematic Part R1,6,25,36,48,54           2K2 R2,7,16,27               470K R3,8,26,31               12K R4,9,39               220R R5,10                   22K R11                   1M5 R12,45                   10K R13,52,53,58,59           […]

Police Car Siren circuit

Police Car Siren circuit using 9013, 9012 R1 …………. 68K ohm R2 …………. 22K ohm R3 …………. 68K ohm R4 …………. 47 ohm C1 …………. 50uF – 12V C2 …………. 0,05uF C3 …………. 100uF – 12V TR1 ………… FCS – 9013 TR2 ………… FCS – 9012 S1 …………. Push Switch

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