Description: The Russian edition of the seventh volume from the immensely popular American series "Encyclopedia of Electronic Circuits. Volume 7" features around one thousand circuit diagrams sourced from a variety of materials, including manufacturer documentation, reference books, and magazines. This book includes the first part of the Russian translation, comprising 300 articles. Within these pages, readers will find not only schematics for finished devices, instruments, and systems but also individual circuit design solutions. As such, this volume will be invaluable for both novice hobbyists assembling their first projects and seasoned professionals seeking fresh ideas. Contents: 1. Active antenna circuits 2. Security and alarm system circuits 3. Amateur radio circuits 4. Circuits for hobby television 5. Low-frequency amplifier circuits 6. Various amplifier circuits 7. High-frequency amplifier circuits 8. Tube amplifier circuits 9. Analog-to-digital converter circuits 10. Antenna tuning indicators 11. Car alarm circuits 12. Car security system circuits 13. Backup power and battery switch circuits 14. Battery charger circuits 15. Testers and monitoring devices for batteries 16. Listening device circuits 17. Oscillator circuit diagrams 18. Circuits for learning Morse code 19. Comparator circuits 20. Additional computer equipment circuits 21. Controller circuits 22. Converter circuits 23. Counter circuits 24. Quartz oscillator circuits 25. Detector radio receiver circuits 26. Circuits for testing quartz resonators 27. Current source circuits 28. DC-DC converter circuits 29. Decoder circuits 30. Detector circuits 31. Display and indicator circuits 32. Doubler circuits Appendices