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Posts tagged memory

Low Battery Disconnect

Low Battery Disconnect and Memory Backup Circuit in the ADM666A

Pre-amp or Amplifier Project to Filter out any HUM at AUDIO CAR – mp3 – home studio

This page three adjustable notch filters configurations are shown . They can be used in your small pre-amp or amplifier project to filter out any HUM at 50 Hz ( European ) or 60Hz . By substituting the capacitors values in the bridge other frequencies can be used . All op-amps configuration requires a +/- […]

3000W Inverter

3000W Inverter Parts list: R1=10Mohms R2=100ohms R3=1.2Kohms R4=560Kohms R5-6=2.2Kohms R7-8=56 ohms 5W CX=22pF trimmed capacitor C1-2=22pF ceramic C3=8.2nF 100V MKT c4=10uF 16V C5=47uF 16V C6=470nF 400V D1=5V6 0.4W D2-3=47V 1W Q1-2=BS170 Q3-4=BD139 Q5-6=BD249 IC1=4060 IC2=4013 IC3=4047 CR1=3.2768 MHZ crystal T1=220Vac/2X10V 2X2.2A F1=5A Fuse F2=0.25A Fuse L1=1H smoothing choke 1. Advanced Energy Flow Management for lowest […]

Head preamplifier circuit

Head preamplifier circuit using BC500c, BC550c

Digital Dip Switch Circuit Diagram

Digital Dip Switch Circuit Diagram using DS3904

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