Dual LED Flasher by 2N2907

This circuit calls more Free Running Multivibrator work resemble Flip Flop. Which encourage itself repeatedly. The Q1 and Q2 be Transistor PNP be usable general (2N3906,2N2907, etc.) The R1 and R2 limit current that flow through LED the bilateral. If enhance the value C1 and C2 the rate something Flasher slow down. Request friends have … Continue reading Dual LED Flasher by 2N2907

Two Automatic battery charger circuit

A lead-acid battery charger circuit  is most popular though it will very large size than others battery type. But them have advantage are : cheap, easy to buy and long life if correctly uses. The charging is best importance. When I had 10 year old ago. My father bought it to me in first time of my … Continue reading Two Automatic battery charger circuit

First tone controls projects for electronic students

This is the first pre tone for you. Since easiest to builds all components is assembled on one PCB, so small size and cheapest. I like the transistors pre amplifiers with tone controls. Because low noise and classic not outdated. For students, college students, took the basic tone control circuit in particular. But it can … Continue reading First tone controls projects for electronic students

Peak Hold LED stereo VU meter using L1424

This VU-meter can show peak signal on 12 LEDs stereo system and use L1424 as main so easy to build. The importance of the VU-meter, In addition to shows the level of signal and add colorful on the audio system or others tools. The Peak-hold VU-meter have 2 channel or stereo. The main goal of … Continue reading Peak Hold LED stereo VU meter using L1424

Electronic VU meter by LM3914 and LM3915

Here is High performance LM3914/LM3915 VU meter projects that widely popular can display with 20 LEDs on stereo or mono with 10 LEDs for all audio system.And can easily build and cheap you must happy when use it. This electronic VU meter set is circuit that High performance and widely popular than 40 years. This … Continue reading Electronic VU meter by LM3914 and LM3915

Many Electronic Circuits with PCB