Junaid's Blog

Tag: circuit

  • Electret Mic Stereo Preamplifier

    —

    by

    Junaid
    in

    I was looking for a simple per-amplifier circuit. Found one at http://www.minidisc.org/mic_preamp/Simple%20Stereo%20Electret%20Mic%20Preamp.htm. I made minor modifications and here is my version.

  • LED Light with CYT1000B

    LED Light with CYT1000B

    —

    by

    Junaid
    in

    Lighting LED with AC main supply were not that easy. Mainly it required some sort of SMPS with current controlling circuitry. But it is changing. Now there are integrated circuits available specially designed to help to light LEDs with few extra components. One of such IC is CYT1000B. I like CYT1000B more compared similar ICs…

  • Thermocouple Amplifier with OP07C Op-Amp

    Thermocouple Amplifier with OP07C Op-Amp

    —

    by

    Junaid
    in

    Recently I created a soldering station based on Arduino Pro mini. It has to read temperature data from a thermocouple within the soldering iron. Thermocouple produces a very little voltage, around up to 30 Milli volts for soldering irons. So, the soldering station uses an op-amp based circuit to amplify those small signals from the…

  • One Channel Relay Module

    —

    by

    Junaid
    in

    Here is the schematic and details for creating one channel relay module. It would be capable of driving both DC and AC current when appropriate relay is used. We can connect output pin of most of microcontrollers including Arduino to control it.