## Tuesday, November 6, 2018

### Circuit Schematic Simple DC Dimmer Lamp using LM358

Eltronicschool. - This is oen of the best simple DC dimmer lamp based on IC LM358 look like shown in Figure 1 and Figure 2 below. The main component needed int his circuit is LM358 and MOSFET IRLZ44.

In this time, beside we will give you the circuit schematic of simple DC dimmer lamp using LM358, we also will give you the global description of this circuit came from the original source.

Circuit Schematic

 Figure 1. Circuit schematic of pulse-width modulation control (Source: https://www.electroschematics.com)

 Figure 2. Circuit schematic of The Power Driver Dimmer Lamp (Source: https://www.electroschematics.com)

Component Part
1. LM358
2. IRLZ44 Mosfet
3. Resistors
4. Variable resistor
5. Diode
6. Capacitors
Description

According Electroschematics site describe sometimes you want to have specific modules in your lab that are not available off the shelf — a compact DC dimmer/regulator module, for example. That’s why I decided to develop my own module, which consists of just a few standard electronic components. The module can be used as a key element to control the brightness of DC lamps and/or the speed of small DC motors in portable hand tools like your PCB drill.

In this basic, op-amp–based, astable design, components R1 and C1 set the operating frequency as the astable operation relies on repeatedly charging and discharging the capacitor from the output of the op amp through the resistor. The other three resistors (R2, R3, and R4) control the minimum and maximum voltage that the capacitor charge comes across during a cycle of oscillation. The output at the capacitor (Pin 2 of IC1) is shaped like a sawtooth wave, but a square wave (SQW) is available from the output (Pin 1 of IC1) of the oscillator. For the given configuration, the frequency is fairly close to 5 kHz.

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1. Thank you for sharing, very clear and practical, I am a newbie, I found a lot of LM358 electronic components at http://www.winsupport-ic.com/search-parts/LM358.html, but I don't know how to choose the current and voltage.

2. cool stuff you have and you keep overhaul every one of us