charger • Page 3 of 3 • Tech Projects

NIMH NICD BATTERY FAST PWM CHARGER CIRCUIT ATMEL AVR

Leave a Comment / Using Atmega / By Tech Master

Battery charging circuit atmel attiny26lp based on switched PWM works as a fast charge is doing the switching circuit 100UH coil and irf5305 irl3803 MOSFETs used charging current of 300 mA, 600 mA ……Electronics Projects, NiMH NiCd Battery Fast PWM Charger Circuit Atmel AVR “avr project, battery charger circuit, microcontroller projects, “ Battery charging circuit atmel attiny26lp based …

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Microcontroller Based Smart Battery Charger Using Atmega

Leave a Comment / Using Atmega / By Tech Master

The circuit what you are about to see is a smart battery charger based on ATMEGA8A with auto cut off.Different parameters are shown via a LCD during different charge states.Also the circuit will make sound via a buzzer upon charge completion. I built the …

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Bosch glue pen teardown

Leave a Comment / Tech News Updates / By TechExpert

Intro My cheap plug in hot glue gun died and looking for a replacement I found this: the Bosch Glue Pen What does it do? it’s a hot glue gun for 7 mm glue sticks that warms up in 15 seconds. Charges via micro USB. Much better than my old one that needed ~5 minutes …

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BQ25504 Solar Cell LiPo Charger

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Ultra-Low Power LiPo Charger via Energy Harvesting from a Solar Cell What is it? This is a small (0.5 x 0.5 inch) breakout board for Texas Instrument’s BQ25504 Ultra Low Power Boost Converter with Battery Management for Energy Harvesting Applications. From the datasheet: “The bq25504 device is the first of a new family of intelligent …

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How to make a USB Li-Ion charger

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Li-ion cells become more and more popular due to their capacity and reasonable prices. In this entry I will show how to build a simple li-ion battery charger based on MCP73831 chip. It’s a quite useful device for DYI projects, in addition its cost is only around 1,5 euro The device uses USB port as …

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SMPS with Battery Backup and NiMH Charger

Leave a Comment / Blog, Tech News Updates / By TechExpert

I designed this circuit for the same reason that i designed the SMPS Boost regulator with the MCP1640 – To gain experience in SMPS technology. This time i use the high power LM2595 buck regulator. The circuit accepts any AC voltage from 8 to 45 Volts. This wide input voltage range is a remarkable feature! …

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Add charging status to simple lithium-ion charger

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Like other simple, single-cell lithium-ion battery chargers, Microchip’s MCP73812 provides no means of indicating the charging status. You can remedy this situation by adding four components (Figure 1). Add one more LED, and you also get a charging-complete indication. This two-LED configuration has the added benefit that one of the LEDs is always on, providing …

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Lead-Acid Battery Charger 555 Based Constant Current

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Sealed Lead Acid batteries are often used in amateur radio as a convenient power source for radios, since amateur radio equipment has standardized on 12.6V. The Cal Poly Amateur Radio Club enjoys a steady source of donations of slightly used SLAs, so I got a few of them with need for a battery charger. Since the …

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