6V, 12V, 24V Lead acid battery charger using LM317
See 4 LM317 Lead-acid battery charger circuits for 6V, 12V, and 24V battery. With automatic charging and full charged Indicator using TL431. Easy to build.
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September 7, 2019
36 Hobby Electronic Projects
Are you bored? Watching TV or playing games not your way. Let's do the Hobby Electronic Projects. I try to collect project lists. You may build quickly them when having free times. Most cheap and easy to find parts.
September 5, 2019
IC 4017/CD4017 Datasheet | Pinout | 15 example circuits
IC 4017 CMOS-Decade counter/divider. When we build the 10 LEDs running light for hobby. Often use IC-4017. This really neat chip contains counter,decoder[...]
September 2, 2019
Food & Water Salinity Tester Meter circuit
SEE a simple salinometer or salinity tester in food and water. Good for health. Using LM324 and few parts and LED display easily use, with 9V batts
September 1, 2019
0-50V 3A Variable power supply
It is a modern circuit, Thus you can buy all components in the local store or buy KIT. And the important thing is the overcurrent protection.
August 31, 2019
TDA2050 amplifier stereo 35W-75W
If you want build hi-fi power amplifier about 30watt to 50Watt or 75 watt. Recommend use TDA2050 below, builds by the integrated circuit and PCB layout.[...]
August 31, 2019
How do SCR works and basic circuits
Have ever you see SCR? Some may it instead of switches and relays. We have seen it works high speed and quiet. Sound good, doesn't it? If we are going…
August 30, 2019