In this project
Introduction
Do you have a passion for creating unique and innovative electronic circuits? Are you ready to take your skills to the next level and impress your friends with a mesmerizing mini-running light circuit? Well, look no further, as we've got you covered! This post will show you how to create a mini running light circuit using a couple of ICs, the 555 and the UAA170.
With our step-by-step guide and expert tips, you'll be able to create a visually stunning circuit that will amaze and impress anyone who sees it. So, get ready to dive into the exciting world of circuit building and create a visually stunning mini-running light circuit that will leave everyone in awe!
Hardware Required
| S no | Components | Value | Qty |
|---|---|---|---|
| 1 | IC | NE555, UAA170 | 1, 1 |
| 2 | Capacitor | 10uF, 4.7uF | 1, 1 |
| 3 | Resistor | 1k, 330, 27k, 10k | 2, 1, 2, 1 |
| 4 | Variable Resistor | 1M | 1 |
| 5 | LED | - | 16 |
Circuit Diagram
Circuit Operation
Rather than directly connecting the UAA170 driver to the 555 output, this circuit employs an RC network and a triangular voltage supplied by P1 to control the driver. C1, a tantalum capacitor, should be used in order to limit leakage current.
It's important to note that the input voltage for IC2 should not exceed 6 V, and Zener diode D17 should be used to control the triangular voltage and keep the supply voltage to IC1 under 9.1 V. An 8.2 V or 6.8 V type may be used instead.
D16 is supplied with a reference voltage from Pin 5 of IC1, which is two-thirds of the voltage provided to the 555. The voltage range for the LEDs is determined by the voltage at pins 12 and 13, while the potential at the R4-R5 junction or Pin 12 of IC2, which adds up to 3 V, serves as the reference voltage for D1.
Battery Supply Requirements
Keep in mind that this mini-running light circuit requires 30 mA of current. Two PP3s connected in series and a 12 V regulator are needed to enable battery supply.
Conclusion
With just two ICs, this mini-running light circuit is simple yet efficient. By carefully following the circuit description and properly selecting and connecting the required components, you can quickly build a working running light circuit with up to sixteen LEDs. Try this circuit, and feel free to ask questions in the comment section.
Discussion
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