This circuit produces a soft turn-on for halogen lamp filaments upon powerlng up，MOSFETRI used is a BUZ10, which has 0.2Ω RDS on.R1,R2，and C1 set the turn-on rate and D1…

This is quite a common power supply, a lot of the simple breadboard power supplies available on Ebay are based on this kind of design. Many of the parts are…

The ICL7660 is another one of these very useful little IC’s to have in your collection, The ICL7660 is a monolithic, CMOS switched-capacitor voltage converters that can invert, double, divide, or…

The LM380 is a power audio amplifier for consumer application. There are 2 versions an 8 pin DIP package and a 14 pin package where pins 3, 4 , 5…

The LM386 is  a low voltage audio power amplifier. It is suitable for battery-powered devices such as radios, guitar amplifiers, and hobbyist projects. This comes in a 8 pin dual…

This is a simple circuit that was submitted, the purpose was to check the voltage of a golf cart battery that was not in use did not fall below a…

This is another basic circuit using a transistor, you can use this as a noise source for testing an amplifier for example. Schematics   Parts List   QTY PART-REFS VALUE…

This is a simple logic probe based around a transistor A Logic low will switch the LED off A logic high will switch the LED on Schematic   Parts List…

This is a basic amplifier example using a transistor, you adjust RV1 to get the best results. You can get around about a gain of 50 (Vout/Vin) Schematic

Resistors in series Example 1 is 2 resistors in series In this example the total resistance (RT) = R1 + R2. So in the example above its 10k + 10k…