Test equipment schematics

  1. 1-Wire Barometer
  2. 220V live wire-in-wall scanner
  3. 3 PHASE - 3 WIRE SEQUENCE INDICATOR
  4. 3 1/2 Digit LCD Digital Panel Meter (PDF)
  5. 4 Channel Digital Storage Attachment
  6. 4 1/2 DIGIT COUNTER (PDF)
  7. 40KHz Auto Ranging Frequency Meter (PDF)
  8. 555 Timer Go-No-Go tester
  9. 555 Timer/Oscillator Tester
  10. 555 Timer IC Tester
  11. 6 Digit Counter (PDF)
  12. 7 Segment LED Counter
  13. AC Line Current Detector
  14. Adjustable Continuity Tester
  15. Air Flow Detector
  16. Air Flow Detector 2
  17. Aktiviranje pomo�u pritiska
  18. Audible Continuity Tester
  19. Audio Frequency Meter
  20. Audio Millivoltmeter
  21. Audio Test Oscillator
  22. Audio Frequency Noice Generator (PDF)
  23. BAROMETAR
  24. Battery Equal Charge Indicator
  25. Battery Monitor for 12V
  26. Battery Tester for 1.5 and 9V
  27. Beat Frequency Indicator
  28. Car Water Temperature
  29. Capacitance Meter
  30. CAPACITANCE METER 1p - 10 uF
  31. Chrismas Lights Tester
  32. Circuit drawing of the LCD thermometer
  33. Color Sensor
  34. Contactless AC Mains Voltage Detector
  35. CMOS Logic Probe
  36. Connection Tester
  37. Continuity Tester
  38. Continuity Tester, Latching
  39. Continuity Tester, Smart
  40. DC Voltmeter with high impedance
  41. Dave Tutelman's Frequency Meter
  42. Dark Activated Switch
  43. Dashboard Digital Voltmeter
  44. Detecting Extraterrestrial Gravity
  45. Detektor metala
  46. Detektor nule
  47. Digital Capacitance Meter
  48. Digital Clock
  49. Digital frequency counter
  50. Digital frequency counter 2
  51. Digital Frequency Meter 1HZ - 1MHZ
  52. Digital Mains Voltage Indicator
  53. Digital Remote Thermometer
  54. Digital Thermometer
  55. Digital Volt and Ambere meter
  56. Dinami�ko ispitivanje tranzistora i odredjivanje tipa
  57. Distortion Analyser
  58. Divide by 1.5 Counter (PDF)
  59. DIY Wavemaker
  60. Droopless Peak Detector
  61. Electromagnetic Field Detector
  62. Electromagnetic Field Probe with Meter Output
  63. Electronic Thermostat
  64. E l e c t r o s c o p e
  65. ELF CIRCUIT DESIGN
  66. ELF MONITOR
  67. FIELD-STRENGTH METER
  68. Field Strength Meter
  69. Field Strength Meter MkI
  70. Field Strength Meter, VHF Band
  71. FLASH METER
  72. Frequency comparator
  73. Frequency Counter
  74. Frequency Counter 2
  75. Frequency Counter - 50MHz
  76. Frequency Counter - 1.2GHz
  77. FREQUENCEMETRE DE 0 Hz /999 999Hz
  78. Fr�quencemetre 1 Hz - 10 Mhz
  79. FREQUENCEMETRE ULTRASIMPLE
  80. Frequency to Voltage Converter (PDF)
  81. Full Featured Transistor Tester
  82. GAMEBOY - Digital Sample Oscilloscope (PDF)
  83. Geiger Counter
  84. Glitch Detector
  85. GRID DIP OSCILLATOR
  86. High Impedance Buffer and Broadband Amplifier for Digital Freq. Meters
  87. High Resistance Voltmeter
  88. Implementing a Line Frequency Meter (PDF)
  89. Inductance-Capacitance Meter
  90. Indikator oda�iljanja
  91. "In Circuit" ELECTROLYTIC TESTER
  92. IN-CIRCUIT TRANSISTOR/SCR/DIODE GO-NOGO TESTER
  93. INVISIBLE BROKEN WIRE DETECTOR (PDF)
  94. ION DETECTOR
  95. Inductance Meter Adapter (PDF)
  96. IR Remote Control Tester
  97. Ispitiva� zener dioda
  98. Kontroler proto�nosti
  99. LCD frequency meter
  100. LCD thermometer
  101. LED Osciloskop
  102. LIQUID FUEL GAUGE
  103. Live-line Detector
  104. LM3911 Temperature Controller
  105. Logic Probe
  106. Logic Probe 2 (PDF)
  107. Logic Probe with Pulse
  108. Loudspeaker Test Box
  109. Magnetic proximity sensors
  110. Magnetic Proximity Switch
  111. Mera� kapaciteta
  112. Merenje temperature voltmetrom
  113. Metal Detector
  114. Metal Detector 2
  115. Microphone Circuit Test Oscillator
  116. Missing Pulse Detector
  117. Missing Pulse Detector 2
  118. Milli Voltmetre HF
  119. MILLIGAUSS METER
  120. MOSFET testing
  121. MOSFET testing 2
  122. Multi Wire Cable Tester
  123. Noise Generator
  124. Noise Generator 2
  125. "Octopus" Oscilloscope Test Adapters
  126. Om-metar za male otpornosti
  127. Otporni�ka dekada
  128. Opamp Design and Test Board
  129. Panel Mounting Radio Frequency Counter
  130. PCB VSWR BRIDGE
  131. pH Meter
  132. pH Meter 2
  133. pH Meter (Low Cost)
  134. pH Probe and Detector
  135. pH Probe Amplifier / Temperate Compensator
  136. Piko-ampermetar
  137. Pink Noise Generator for Audio Testing
  138. POWER ZENNER DIODE
  139. Precision attenuator with digital control
  140. Precision Audio Millivoltmeter
  141. Proximity Touch Switch
  142. Pulse Reading Logic Probe
  143. Random-bit-sequence generator
  144. Reflectometer
  145. RF POWER METER
  146. RF SIGNAL GENERATOR
  147. Resistor Decade Box Plans
  148. Scalable Noise Generator
  149. Self Oscillating Amplifier for Distortion Testing
  150. Short-Circuit Beeper
  151. Signal - injektor
  152. Simple 6-Digit 40MHz Frequency Counter Module
  153. Simple Analog-to-digital Converter
  154. Simple Event Counter
  155. Simple Field Strength Meter
  156. Simple Polarity Tester
  157. Simple RF Measurement Probe
  158. Simple Remote control Tester
  159. Simple Signal Generator for Signal Tracing
  160. Simple test equipment to build
  161. Single-Chip Digital Voltmeter
  162. Sound Detector
  163. Soviet CH4-1 frequency meter
  164. Strain-Gage Sensor
  165. Temperature Sensor with Digital Output
  166. Temperature Meter (PDF)
  167. Temperature Monitor
  168. Testing a SCR
  169. Testing a UJT
  170. The Femto Capacitance Meter
  171. The Inductance bridge
  172. Thermostat
  173. Three Digit Counter (PDF)
  174. Time Domain Reflectometer (TDR)
  175. To Measure High Voltages
  176. Tiny Dew Sensor
  177. Ultra-simple Voltage Probe
  178. UV Sensitive Photodetector
  179. Water-Level Sensor
  180. Wire Tracer
  181. XTal Tester
  182. Zener Diode Tester
  183. Zener Diode Tester 2
  184. Zener Diode Tester 3 (PDF)
  185. Zener Diode Tester 4

 

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