

Topic Entry
- digital system using 7segment decoder
- 2n3055 power supply schematic
- 20a pwm motor controller 555 schematic
- 150w power amp circuit diagrams
- 12v transistor amplifier
- transistor mic preamp with controls
- circuit diagram of dynamic microphone preamplifier
- convert TTL output sinewave
- simple fet mixer
- 7812 voltage regulated power supply and the voltage on each component