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1.5V FM transmitter circuit, 88-108MHz using transistors

These are four 1.5V FM transmitter circuit (low volt) which use transistor and a few parts, without PCB but easy to build for output 88-108MHz or 90-100MHz, more circuits below [...]

May 1, 2015RF - Radio Circuits4 Comments

RF - Radio Circuits

Simple Two Transistors AM Transmitter Circuit

This simple AM transmitter circuit include of many parts. There is a transistor Q1 act as increase the audio signal (AF) from the crystal microphone and...[...]

March 28, 2015RF - Radio CircuitsNo Comments

RF - Radio Circuits Oscillator circuits

Voltage to Frequency Converter Circuit

See idea: Voltage to frequency converter circuit use CA3130 OP-Amp, that linearity Of changing up to 0.5% and Temperature coefficient.

November 28, 2014RF - Radio Circuits, Oscillator circuits2 Comments

RF - Radio Circuits Oscillator circuits

ECG simulator circuit using CD4521 and CD4017

ECG simulator circuit is very useful in the medical community. Such as experimental research - development of bio-medical image, using Digital IC as main [....]

March 8, 2014RF - Radio Circuits, Oscillator circuits11 Comments

VCO circuit using schmitt trigger 74HC14

RF - Radio Circuits Oscillator circuits

Simple VCO using schmitt trigger using 74HC14

This is Simple VCO circuit using schmitt trigger using 74HC14__Hex inverting, which inside have 6 schmitt trigger, but applied one frequency controller

November 6, 2013RF - Radio Circuits, Oscillator circuitsNo Comments