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.
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.
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
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.
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.[...]
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…