Published:2013/5/7 21:10:00 Author:muriel | Keyword: Electronic Fuse
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Published:2013/5/7 21:09:00 Author:muriel | Keyword: PULSE RELAY
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Published:2013/5/7 21:08:00 Author:muriel | Keyword: ELECTRONIC FUSE
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Published:2013/5/7 21:07:00 Author:muriel | Keyword: Electronic fish lure
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Published:2013/5/7 21:07:00 Author:muriel | Keyword: Electronic dice
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Published:2013/5/7 21:06:00 Author:muriel | Keyword: Electronic coin tosser
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Published:2013/5/7 21:04:00 Author:muriel | Keyword: Electrical Device , Harvests Earthworms
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Published:2013/4/11 1:45:00 Author:Ecco | Keyword: improved differential
The improved differential circuit diagram is shown as figure.
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Published:2013/4/11 1:46:00 Author:Ecco | Keyword: basic application
INA101M basic application circuit diagram is shown as figure.
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Published:2013/4/11 1:38:00 Author:Ecco | Keyword: Basic same-phase integrator
Basic same-phase integrator circuit is shown as figure.
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Published:2013/4/11 1:36:00 Author:Ecco | Keyword: Differential differential
Differential differential circuit diagram is shown as figure.
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Published:2013/4/3 3:45:00 Author:Ecco | Keyword: Emitter-coupled, bistable amplitude, discriminating
Emitter-coupled bistable amplitude discriminating circuit is shown as figure.
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Published:2013/4/1 3:15:00 Author:Ecco | Keyword: Fet Audio Mixer
This simple circuit mixes two or more channels into one channel (eg. stereo into mono). The circuit can mix as many or as few channels as you like and consumes very little power. The mixer is shown with two inputs, but you can add as many as you want by just duplicating the sections which are clearly visible on the schematic.
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Published:2013/4/1 3:07:00 Author:Ecco | Keyword: Audio Line Driver
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Published:2013/4/1 3:04:00 Author:Ecco | Keyword: Audio, Vu Meter 9 Leds
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Published:2013/4/1 2:47:00 Author:Ecco | Keyword: 3 Line Mixer
This project is a 3 or more lines mixer. For more than 3 inputs you can repeat the input parts (P=10K R=22K). It powered with 9Vdc.
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Published:2013/3/29 4:43:00 Author:Ecco | Keyword: Monitoring Off-Air Condition
The circuit of off-air monitor for SSB transmitter can be built by using combination of detector product with the crystal oscillator. This circuit is used for testing the audio at one point within band. The quality of audio will still constant, if loading and tuning of SSB transmitter are same over rest of band. The LC circuit will resonated to band being used. When the transceiver is in receive mode, this circuit will spot the oscillator signal. And if the transceiver transmit the signal, the transceiver can be monitored. Here is the schematic diagram of the circuit:
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Published:2013/3/29 4:41:00 Author:Ecco | Keyword: Chromel Alumel, Thermocouple Current Loop , transmitter
The schematic diagram below show signal conditioning circuit for remote current loop temperature transmitter. This thermocouple temperature transmitter is loop powered, means it doesn’t need its own power supply since the supply is provided by the current loop receiver. Thermocouple is basically a junction of two different metallic material that measures the temperature difference.
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Published:2013/3/29 4:34:00 Author:Ecco | Keyword: Active Antenna , Gain (Booster)
This is an active antenna circuit with gain. This circuit is used to bost the signal. This circuit is made from a few transistors and other components. This circuit can provide RF gain of about12 to 18 dB. This circuit uses Q2 as a voltage amplifier. the RF signal direct-coupled from Q1’s Source terminal to the base of Q2. The Q3 is configured as an emitter-fallower amplifier which match and isolate the gam stage from the receiver’s RF-inputcircuitry. Here is the schematic diagram of the circuit:
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Published:2013/3/29 4:33:00 Author:Ecco | Keyword: Transceiver Saver, Overvoltage Protector
This is a transceiver saver circuit that protect a transceiver device (applicable to other device as well) from overvoltage of the power supply. This circuit is used to protect the device by regulating the power supply, avoiding damaging the device if overvoltage occurs. If the transceiver transmits current of above 2A, a heatsink should be used for the transistor. The value of resistor must provide output of 12.6 V during normal operation, you can make trial and error through measurement when choosing this., you can start with value around 100R. It’s recommended to use a high wattage Zener diode. Here is the schematic diagram of the circuit:
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