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Archives for April, 2010

Stereo Audio Preamp schematic

Stereo Audio Preamp schematic using KA1222 Stereo Audio Preamp schematic using KA1222

Make the switch touch with the Electronics Schematic Diagram

Make the switch touch with the Electronics Schematic Diagram Turn on and off electrical devices using the touch of a button, so you can “play” your electronic devices more enjoyable, Touch the switch can be used in dry places and will not survive wet or very dusty areas.. You only need to add a relay […]

Power integrated circuit

Power integrated circuit 300W Power Amplifier circuit using TR A564, D438, B507, D313, MJ2955, 2N3055 300W Power integrated circuit using TR A564, D438, B507, D313, MJ2955, 2N3055

How The History of Logic PLC ?

When production requirements changed so did the control system. This becomes very expensive when the change is frequent. Since relays are mechanical devices they also have a limited lifetime which required strict adhesion to maintenance schedules. Troubleshooting was also quite tedious when so many relays are involved. Now picture a machine control panel that included […]

no picture and audio on my TV?

Bernardo B asked: there is no picture and audio on my TV when i turn-on my TV, but there’s a sound thuk from the speaker when i plug-in the supply cord. i tried to open the back of the TV to check if the fuse is ok and it seems to be good. i trace […]

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