Author Archives: Rend

Featured Posts

MAX1703 Single-Cell Boost Converter Circuit

When you design a circuit with only a single-cell battery, you will need boost-converter to provide enough voltage for most ...

Read More

55MHz Scope Sensitivity Amplifier

Scope sensitivity amplifier is a vital front-end signal processing for every scope instruments. The function of this circuitry is simple: ...

Read More

Two-Band Bxandall Active Tone Control

Using active circuit for tone control means that we can provide cut and boost, maintaining overall amplifying factor of original ...

Read More

Pulse Width (PWM) Controller Circuit

A LM3900 quad operational amplifier can be used to build a pulse width (PWM) controller. The LM3900 was chosen because ...

Read More

Small TV Modulator Using A Motorola MC1374

How can television modulator be small and simple like this? First, it uses integrated circuit, and the second, any TV ...

Read More

Bi-Stable Multivibrator (RS Flip-FLop) with Op-Amp

This bi-stable circuit uses an op-amp, acts similar with RS flip-flop. Bi-stable circuit is a circuit with two stable states, low and remain low until set is triggered, or high and remain high until reset is triggered. Here is the … Continue reading

Posted in Control Electronics | Tagged | Comments Off on Bi-Stable Multivibrator (RS Flip-FLop) with Op-Amp

Amplitude Modulator with OTA

Circuit described in the schematic diagram below can achieve 99% modulation easily with maximum frequency of 200kHz. The amplification of this circuit can be controlled easily since the transconductance of an operational transconductance amplifier is directly propotional to the control … Continue reading

Posted in Signal Processing | Tagged | Comments Off on Amplitude Modulator with OTA

Spectrum Analyzer Adapter for Oscilloscopes

The circuit shown in the following schematic diagram is a simple spectrum analyzer adapter circuit for oscilloscopes. This circuit can be used for scanning or monitoring a segment of radio spectrum or amateur band.  Inside this circuit,  an NE602 mixer … Continue reading

Posted in Test and Measurement | Tagged | Comments Off on Spectrum Analyzer Adapter for Oscilloscopes

555 IC LED Flasher for Up To 10 LEDs

This LED flasher circuit uses 555 IC, and is capable of driving up to 10 LEDs. The good news is, the use of multiple LEDs in series doesn’t increase the power consumption when compared with using only two LEDs. If … Continue reading

Posted in Lighting and LED Circuit | Tagged , , | Comments Off on 555 IC LED Flasher for Up To 10 LEDs
« 1 2 3 4 5 6 7 8 9 10 11 12 ... 50 »