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$10 Receiver has MicroVolt Sensitivity - 08/18/94 EDN-Design Ideas / (added 3/03)
three-transistor circuit in Fig 1 costs less than $10 to build, uses commonly
available components, and consumes less than 10 mA from a single 9V battery. If you
wind coil L1, as figure shows, circuit receives signals in 5to 15-MHz
short-wave.... |
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136 kHz Direct Conversion Receiver - The front end is described elsewhere
prea136.htm The scope is reduce as most as possible the image frequency. I have also
tried a different front end, based on a low pass filter with frequency cut-off of 180
kHz. In my QTH I had a lot of undesirables signals on the screen of the PC. The filter
is tuned with a signal generator for a bandwidth of 300 Hz, ....(electronic schematic
/ circuit added 4/02) |
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16 Bit PC Serial Port Receiver CMOS - (electronic diagram added 6/06) |
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175KHz Inductive Pulse Receiver - This circuit is discussed in more detain in the
Experimenters Journal. The receiver’s six inch diameter coil detects the ring signal
from the above transmitter and use a single NPN transistor to provided enough
amplification for the signal to be easily viewed on an oscilloscope. ….(designed by
David A. Johnson) |
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2 Watt Switching Power Supply - In this small switching power supply, a Schmitt
trigger oscillator is used to drive a switching transistor that supplies current to a
small inductor. Energy is stored in the inductor while the transistor is on, and
released into the load circuit when the transistor switches off. The output voltage is
dependent on the load resistance and is limited by a zener diode that stops the
oscillator when the voltage reaches about 14 volts. Higher or lower voltages can be
obtained by adjusting the voltage divider that feeds the zener diode. The efficiency
is about 80% using a high Q inductor...(added 6/06) |
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27MHz toy car receiver - (electronic circuit added 4/05) |
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2uS Light Pulse Receiver - ….(designed by David A. Johnson) |
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32 Bit Serial Receiver 57.6 K Baud TTL and CMOS - (circuit / schematic design
added 6/06) |
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4 Band Double Tuned Preselector - (electronic schematic / circuit added 4/02) |
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40 Meter Direct Conversion Receiver - (electronic Circuit / Schematic added 10/04) |
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40 Meter Popcorn Superhet Receiver - schematic for a no-frills, relatively
low-cost CW superhet receiver with a 4.00 MHz Intermediate frequency. There is no AGC
or RF gain control, however this receiver has good large signal handling capability.
This receiver uses just 6 bipolar transistors and an op amp for reasonable volume into
headphones. Much ....(design added 05/08) |
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40m Direct Conversion Receiver - (design added 8/03) |
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42 Mc Band to 88 Mc Band retrofit Converter Project - Before World War II the FM
radio band was just below 50 Mc. Read all about it. If you have such a radio, you
might want to build this converter. It will let your old set receive….(electronic
schematic / circuit added 4/02) |
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45-860MHz Radio receiver Based on UV916-tuner - This receiver use a TV-tuner, a
simple radio-circuit and a interface to a computer. computer control (set)
receiving frequency from 45-860MHz. purpose of this project is to learn about tuners,
it's a pre-project for my Spectrum analyzer project. UV916 or UV918 tuner is easy to
find in broke TV or VCR:s. It is a common tuner... (added 4/05) |
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49MHz Walkie Talkie - Lots of people are requesting walkie-talkie and RF remote
control schematics, so here is some. Building se circuits needs special equipment and
expertise in RF circuits. If you are going to experiment with se circuits, please note
that I did not build ....(added 8/03) |
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50 MHz to 146 MHz Converter - (electronic schematic / circuit added 2/05) |
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50 Ohm Long Line Receiver and Driver - AS028 Jenson Transformer Application Note
(app note 6/07) |
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8 Channel RF Remote Control - This is an 8 Channel RF Remote Transmitter and
Receiver that will allow to remotely control various electronic projects. RF Remote
Control provides 2 latched and 6 momentary outputs that could be used to control your
favorite devices such as amplifier, robotic devices, RC cars, computer, home
appliances, lamps and many other cool gadgets. ….(electronic schematic added 11/08) |
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80 Meter CW ARDF Receiver - (design added 8/03) |
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80m Direct Conversion Receiver - (electronic schematic / circuit added 2/05) |
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8644A-2 Air Navigation Receiver Testing With The Agilent 8644A - Agilent
Application Note (added 2/06) |
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A GPS Receiver Based Frequency Standard - (circuit / schematic design added 6/06) |
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A Low Cost 4Mbps IRDA Receiver in MS8 and SO-8 Package LT1328 - DN152 Design
Notes (Linear Technology) (app note added 1/06) |
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Add a signal strength display to an FM Receiver IC - 09/05/02 EDN Design Ideas /
(added 1/05)The Philips (www.semiconductors.philips.com) TDA7000 integrates a monaural
FM-radio receiver from antenna connection to audio output. External components
include one tunable LC circuit for local oscillator, a few capacitors, two resistors,
and a potentiometer to control variable-capacitance-diode tuning.... |
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Aircraft Receiver - The Passive Aircraft Receiver is basically an amplified
"crystal radio" designed to receive nearby AM aircraft transmissions. The "passive"
design uses no oscillators or other RF circuitry capable of interfering with aircraft
communications so it should be fine inside the cabin of the aircraft. Nevertheless,
check the regulations before using this receiver on a commercial airliner.....(design
added 8/03) |
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Alternative Power Source for Magellan GPS Receivers - (circuit / schematic design
added 6/06) |
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AM BCB Radio Receiver - (design added 8/03) |
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AM BroADCast Band Regenerative Receiver just two transistors! - (design added
6/07) |
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AM Radio PreAmplifier - (electronic schematic / circuit added 4/02) |
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AM Receiver - This is a compact three transistor, regenerative receiver with fixed
feedback. It is similar in principle to the ZN414 radio IC which is now replaced by
the MK484. The design is simple and sensitivity and selectivity of the receiver are
good. (design added 8/03) |
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AM Receiver for Aircraft Communications - (design added 8/03) |
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Amazing All Band Receiver - (design added 8/03) |
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AM-Receiver for Aircraft communication 118.250MHz - (electronic circuit added
4/05) |
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An Optimized DCE Interface for V.34 Modems using the DS8933 and DS8934 Line Drivers
and Receivers - National Semiconductor Application Note (app note added 6/06) |
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AN-1020: Demodulating with the LMX2240 150 MHz IF Receiver - National
Semiconductor Application Note (app note added 6/06) |
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AN-1034: An Optimized DCE Interface for V.34 Modems using the DS8933 and DS8934 Line
Drivers and Receivers - National Semiconductor Application Note (app note added
6/06) |
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AN-214: Transmission Line Drivers and Receivers for TIA/EIA Standards RS-422 and
RS-423 - National Semiconductor Application Note (app note added 6/06) |
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AN-302: Exploit Digital Advantages in an SSB Receiver - AN-302 Analog Devices
Application Notes (app note added 6/06) |
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AN-759: Comparing EIA-485 and EIA-422-A Line Drivers and Receivers in Multipoint
Applications - National Semiconductor Application Note (app note added 2/06) |
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AN860: RFRXD0420 ASK Receiver Reference Design - Microchip Application Note
Published 27-Dec-02 (app note added 6/06) |
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Automicro RX3302 receiver module photo - ….(circuit design added 04/09) |
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Automicro RX3304 receiver module schematic - ….(design added 04/09) |
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Aviation Band Receiver - (circuit added 9/04) |
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AVR Based Serial Port IR Receiver - (circuit / schematic design added 6/06) |
