CH-025 Curve Tracer Adapter

 CH-026 Door/Window Open Alarm 10-240 seconds

CH-012 BJT Transistor Curve Tracer Plus AC/DC with Regulator Power Dual Supply "Double Pack"

CH-003 HHO High-Frequency PWM DC Motor Speed Controller 30A max Plus Soft Start 12-30VD

CH-029 Pre Microphone XLR upgrade board for MIC capsule XLR Mic

CH-010 Car Ceiling Light Dimmer Delay Off Timer 7-14s for Lamp / LED

Temperature and Voltage Data Monitor via Internet LAN

CH-024 Function Generator Sine Triangle Square Wave 0.5Hz-100kHz Unassembled Kit for Lab

CH-017 Delay On Timer 1-3 seconds for Car Amplifier System 12V / 5A or Car Light

CH-018 Cycling or Repeat Timer 1.5-180 minutes ON-OFF 12VDC/30A Heavy Duty 110V/240VAC