NjK5pexT

HR7P169BFGTF PWM dimming development version_2024-01-20_10-23-30

Overview

First, regarding the power supply, the adapter for the aquarium light I bought previously was a 21V output, so a step-down circuit was needed. I made a simple step-down circuit using a TL431 and SS8050, which should work with most common 5-25V adapters used in homes.

Secondly, as a PWM dimming board, the PWM control circuit is essential

. I added two potentiometers, a tactile switch, and two LEDs for control and interaction. Each pin of the chip is also connected to a header for connecting external modules, such as the OLED module shown in the initial screenshot.

Note: 1. The two GND pins at the DC input connector on the PCB need to be connected with jumpers. Some of my DC005 chips have these two pins connected to GND, while others do not.
2. Attached is a simple PWM timed dimming program source code.

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

Hot

Technical Resources More

Search Datasheet?

Supported by EEWorld Datasheet

Technical Videos More

Forum More

Update:2026-03-28 08:15:23

The initial functions of the EZ430-Chronos wireless fishing sports watch I modified have been realized as planned.
Originally, the data transmission function test with the computer had been successful many days ago, but the specific interface was not completed. However, two or three days ago, due to a detail probl
Lattice management distribution problem
I use lattice's ECP3 95E, which is a FBGA672 package. The design has a ddr2 sdram controller. The lattice datasheet says that for signals such as DQS , dedicated pins must be used, and they are usuall
Does anyone have the antenna test program for 2530?
The board has been made for a long time, but I can't find the open line test program for 2530 under IAR760. There is no such program in the 07 protocol stack. If anyone can give me a copy, I will be v
Pulse fast charging design for lead-acid batteries in electric vehicles
Abstract: The principle of fast charging is explained. In view of various problems that occur during battery charging, a pulse fast charging scheme with graded constant current is adopted, and the des
Concept and solution of ultra-fast battery charging
The battery of an electric vehicle can be used for about two hours, which is very inconvenient for users. It is normal to run out of power when going out. If we have a fast charger, we can quickly rep
Blackfin series ADSP512 has no flash, how to burn the program? I hope the experts can give me some advice
[size=5]Blackfin series ADSP512 has no flash, how to burn the program? I hope the experts can give me some advice[/size]

Datasheet More

Circuits More