1 MHz oscillator using the MC1553 video amplifier

Both transistors should be low-noise types. The original circuit uses the BC650C, which is an ultra-low noise device. These transistors are now hard to find, but the BC549C or BC109C are good replacements. The circuit is self-stabilizing and will...

The ISD1000A is a Direct Analog Storage device which allows you to store 20 seconds worth of voice data on an IC chip which can be played back anytime. The data stored will stay in memory even if the...

High Quality unit with LM833 or NE5532 Low noise Dual Op-amp. No need for a preamplifier. Can be directly connected to CD players, tuners and tape recorders. Tested with several headphone models of different impedance: 32, 100, 245, 300,...

This is a simple cable TV amplifier using two transistors. The amplifier circuit is designed for cable TV systems utilizing 75 Ohm coaxial cables and is effective up to 150 MHz. Transistor T1 is responsible for amplification, providing up...

The output of a video amplifier is differentiated before being fed to a Schottky comparator. The propagation delay is typically reduced to 10 ns. The output pulse width is determined by the value of C, 10 pF, resulting in...

This indicator lets you see how much power an amplifier produces. The circuit uses an LM 3915, the logarithmic variation of the known IC LED VU Meter LM 3914. The circuit is connected directly to the speaker output of...