AM Receiver Feb 7, 2011 … This AM receiver is working perfectly without the need of coils or even a variable capacitor. The LF356 is the basic component. …

ZN414-MK484 Portable AM Receiver Apr 9, 2008 … An AM portable radio receiver made from the ZN414 IC. The ZN414 ic has now been replaced by the MK484 which is identical in performance and…..

Simple 27 MHz Receiver Feb 7, 2008 … This is a simple RF receiver mainly for low-distance digital radio receiverapplication. … AM/FM/SW Active Antenna by MPF102 …

6 Transistor Super Regen Receiver by BC548 Dec 19, 2007 … This little super-regenerative receiver is essentially an AM receiver, with “ slope detection” used for FM. By tuning to one side of the …

Simple Field strength meter Here is a handy field strength meter that can be used to check the strength of AM radio signals.The circuit is a very useful for those who assemble radio transmitters(especially in the tuning of the final stage for maximum range)….

Low cost AM radio Here is the circuit diagram of a simple and low cost AM radio. The working of this radio circuit is straight forward. Inductor L1 and capacitor C1 forms the necessary tank circuit. Diode D1 performs the job of de-modulation. Transistor T1 is wired as a preamplifier whose output is further amplified by the IC LM386…

Simple Coil-less AM receiver by LF356 This AM receiver is working perfectly without the need of coils or even a variable capacitor. The LF356 is the basic component. P1 and P2 are the frequency selectors. Use a small telescopic antenna. The stations selectivity is not perfect but is acceptable…..

AM reciever with TDA1072A This reciever uses the TDA1072A which is a complete AM reciever on a chip and it only requires comparitively few peripheral components to complete a high quality AM radio Circuit. Unlike some other AM radio ICs, a minimum number of external tuned inductors are used to preserve ….

ZN414-MK484 Portable AM Receiver An AM portable radio receiver made from the ZN414 IC. The ZN414 ic has now been replaced by the MK484 which is identical in performance and pinout. Designed around the popular ZN414 IC this receiver covers the medium wave band band from approximately 550 to 1600 KHz….

CRYSTAL RADIO Description: Crystal radio requires no power supply to operate because it uses energy from the signals it receives. Performance is – like one should expect – poor. Nevertheless, with a good antenna and proper ground, it shouldn’t be too difficult to tune to a strong AM station…..

AM portable radio receiver by ZN414 IC An AM portable radio receiver made from the ZN414 IC. The ZN414 ic has now been replaced by the MK484 which is identical in performance and pinout. Notes: Designed around the popular ZN414 IC this receiver covers the medium wave band band from approximately 550 to 1600 KHz [...]

Pushbutton Relay Selector This circuit was designed for use in a hifi showroom, where a choice of speakers could be connected to a stereo amplifier for comparative purposes. It could be used for other similar applications where just one of an array of devices needs to be selected at any one time…..

Water Pump Relay Controller Circuit Schematic Water reservoir automatic level control Simple circuitry – 12V supply Device purpose: By means of a Relay, employed to drive a water pump, this circuit provides automatic level control of a water reservoir or well. Circuit operation: The shorter steel rod is the “water high” sensor,…

Relay Coil Energy Saver Some relays will become warm if they remain energized for some time. The circuit shown here will actuate the relay as before but then reduce the ‘hold’ current through the relay coil current by about 50%, thus considerably reducing the amount of heat dissipation and wasted power. …

Reducing Relay Power Consumption Relays are often used as electrically controlled switches. Unlike transistors, their switch contacts are electrically isolated from the control input. On the other hand, the power dissipation in a relay coil may be unattractive for battery-operated applications….

DMX Controlled Relay Kit What if you need to do more than dim a resistive incandescent light in your DMX control chain? What if you need to provide an on/off function? Just like the K8039 dimmer, if you are switching a device that doesn’t….

Boost up voltage for relay by BC558 Using relay general the majority then to use power supply that have DC Voltage with the value volt that specify on relay. For relay work but , if , we have no power supply that want to feed give relay. This circuit helps to give relay can work….

Moisture Activated Relay by Bipolar Transistor Today we try to build warn the moistness or Moisture Activated better. Or do go to use be warn it rains. Because of be the circuit is simple. Follow the circuit will think use Bipolar Transistor just one only. When measure touch the moistness make the electric current….

Relay Driver The above is a standard way of driving Small Power Relays from Control Signals generated by Logic or Opamp Circuits. C2 and R5 form a snubber which improves the life of the metal contacts, the contacts can erode due to sparking when switching inductive or even big loads…..