Mains Current Indicator with a LED
This is a mains 230V AC load current indicator and is a LIVE CIRCUIT, so take care. The Resistors have to be a fusible ceramic wire wound. People learning Electricity and Magnetism or Hobby...
Tagged: Panel-Indicators
Digital Control for 8 Channel Analog Mux
A single Voltmeter or Digital Panel Meter DPM can monitor 8 Analog inputs from sensors or potentiometers using a Mux chip and creating simple digital controls for that. The Pushbutton Logically Interlocked Controls are...
16 Channel Analog Multiplexer
This circuit is built around the chip CD4067, now called 74HC4067, it works like a single pole 16 throw rotary switch that can be controlled digitally. Clamping protection diodes are built in. Use resistors...
Synchronized Sample and Hold Analog Mux
This circuit has two analog mux 4051 operating in synchrony to store an analog value in a low leakage tantalum capacitor. This makes an Analog Memory possible and overall system accuracy of around 2{22ca7e5750adbf65450bc4cf6e82790400f3c203d9ecc808a4bc035087435d3d},...
Flashing Mains Neon Lamp
Here is a Neon Flasher circuit (untested) for a user request at Circuits FAQ. This can be built into a switchboard or a gadget for indicating Live Power. D1-C1 form a simple half-wave rectifier,...
Mains Voltage Monitor
i need a circuit design to detect generator voltage and display with LED for certain value of voltage. for example red LED”s for voltage under 180 V, green LED for 180-220V and Yellow LED...
