Creating Transistor Series Voltage Regulator circuit
Small Zener diode voltage regulator circuit with PCB, using transistor and few parts. it is simple and cheap fixed dc source circuit. As one of best choice. Read more
LM317 Regulated Power Supply Voltage Select to 1.5V,3V,4.5V,5V,6V,9V 1.5A
This is LM317 voltage selector power supply projects can select output 1.5V,3V,4.5V,5V,6V,9V at 1.5A current. you can use as as battery, so saving. Read more
High Power Siren circuit
This is High power siren circuit with small PCB size, using CD40106 and four transistor TIP31-TIP32 increase current to horn speaker 20W, 4-8ohm. , and Read more
How to rotate dc motor in both direction
It is easy if you control DC motor in a single direction. Sometimes you think. How to rotate DC motor in both directions. You are not worried. There are many ways to control speed, on-off, and dc motor reverses rotation. Read first: How does H-bridge motor driver works In these circuits below use many types … Read more
7 tone control circuit diagram with PCB layout
Learn! 8 Tone control circuit, Stereo Preamplifier using normal transistors. To control bass and treble effects audio low noise. easy to builds with PCB. Read more