555 timer based projects list

  1. Alternating Blinker Schematic Circuit Diagram
    The circuit represents a general-purpose astable multivibrator that alternatively energizes two heavy loads via a relay (in this case, the loads are 12-V incandescent lamps). In contrast to an ‘analogue’…
  2. Simple Remote Control Tester Schematic Circuit Diagram
    Nearly always when a remote control doesn’t work, the underlying problem is elementary: the unit does not emit light. The cause may be dry solder joints, defective LEDs etc., but…
  3. Rotary Encoder for Digital Volume Control Schematic Circuit Diagram
    The digital volume control published in Elektor Electronics October 1997 can be used either with an RC5 remote control or with two pushbuttons (louder/softer). If for whatever reason you cannot…
  4. Pump Protector Schematic Circuit Diagram
    This circuit has been developed to limit the running time of a sump pump since the pump can be damaged if it runs too long when the sump is dry.…
  5. Fuse Failure Indicator Schematic Circuit Diagram
    This circuit indicates when a device is functioning or when its fuse has blown. It is a development of the Mains/Fuse Failure Indicator published in Elektor Electronics July/August 1995. It…
  6. Simple IR Receiver Schematic Circuit Diagram
    This circuit has been designed to complement the ‘Simple IR Transmitter’ and to decode its transmitted signals. The similarity to the transmitter can be clearly seen: the received data is…
  7. BALANCING LI-ION LI-POLYMER BATTERIES BATTERY BALANCING CIRCUIT Schematic Circuit Diagram
    In addition to the " Li-ion Battery Charge Integrators MCP73831 TP4056 ", " Battery Protection Circuits ", "About Li-ion Li-Po LifePO4 Piller " shared with Li-ion and Li-po batteries for charging, protection , balancing, balancing I will…
  8. Simple IR Transmitter Schematic Circuit Diagram
    This circuit uses just two standard logic ICs which, with the accompanying receiver, forms a four-channel remote control and has been designed for use with the ‘Audio/Video Switch’ and the…
  9. Zero-Crossing Detector for Microcontrollers Schematic Circuit Diagram
    In lighting controllers and clock circuits that need the mains frequency as a parameter for evaluations carried out within a microcontroller, you will often find a transistor stage to convert…
  10. Transistor Tester Schematic Circuit Diagram
    This tester is intended to quickly check whether a transistor is functional or not and possibly also select two or more transistors with (approximately) equal gains. This is about the…