BQ24074 Based Charger
A little charger based on the BQ24074
Created by
dylan.najera
Tier 4
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0 followers
Shadow
requested changes for BQ24074 Based Charger ago
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dylan.najera
added to the journal ago
Repaired the BAT- and BAT+
I was checking if the circuit was good, and well, it was, but I realized the problem: instead of connecting Bat+ and Bat-, I connected two Bat-, but I already fixed it.
dylan.najera
added to the journal ago
Repaired the board
I was looking at my circuit and I kept thinking, 'And what about the OUT and GND to connect the circuit that will be powered by the battery?' and I realized I forgot to include it, so I decided to make the components 0402 to make them smaller and I even managed to make the board smaller than the original. Here is the board already fixed.
dylan.najera
added to the journal ago
Finished the Github
I just finished the GitHub, and I was looking at the price to do it and it seems reasonable to me. I want to get a hot plate so I can solder things myself instead of using JLCPCB. This is how it ends up, now I just have to wait and see if they accept the project.
dylan.najera
submitted BQ24074 Based Charger for ship review ago
dylan.najera
added to the journal ago
Finished the PCB
I had been wanting to make my own lithium battery charger for a while. So I looked around for a bit and found the BQ24074, and by following its documentation I managed to do it. I used this datasheet for the schematic, it was really quick to make this board but it was really fun. I set it to USB500 mode, I decided not to use the 1.2A fast charge mode because, even though it would only require a few extra components, this would generate much more heat, so I preferred to keep it simple. Here are some images of the proyect:
dylan.najera
started BQ24074 Based Charger ago
2/25/2026 1 AM - Finished the PCB
I had been wanting to make my own lithium battery charger for a while. So I looked around for a bit and found the BQ24074, and by following its documentation I managed to do it. I used this datasheet for the schematic, it was really quick to make this board but it was really fun. I set it to USB500 mode, I decided not to use the 1.2A fast charge mode because, even though it would only require a few extra components, this would generate much more heat, so I preferred to keep it simple. Here are some images of the proyect:
2/25/2026 8 AM - Finished the Github
I just finished the GitHub, and I was looking at the price to do it and it seems reasonable to me. I want to get a hot plate so I can solder things myself instead of using JLCPCB. This is how it ends up, now I just have to wait and see if they accept the project.
2/27/2026 3 AM - Repaired the board
I was looking at my circuit and I kept thinking, 'And what about the OUT and GND to connect the circuit that will be powered by the battery?' and I realized I forgot to include it, so I decided to make the components 0402 to make them smaller and I even managed to make the board smaller than the original. Here is the board already fixed.
2/27/2026 9 AM - Repaired the BAT- and BAT+
I was checking if the circuit was good, and well, it was, but I realized the problem: instead of connecting Bat+ and Bat-, I connected two Bat-, but I already fixed it.