Schematic Power Amplifier and Layout

When we install a light or audio amplifiers in automotive, there are some things to consider  : 1. Make sure you use a cable rated for higher amperage, because if the value of small ampere results can be too hot and could melt the cable outlet and cause a fire. Beside that is likely to […]

I decided to build a compact, yet effective alarm. My demands were:- simple construction, reliable operation, very small power consumption, and, most of all, small size. I started with CMOS logic gates, but was soon forced to abandon the concept after a few unsuccessful attempts. Then I suddenly realized that a simple transistor switch might […]

12SL7 SRPP / KT88 SIPP acoustic Tubes Amp and audio tube amp and supplies A Pair of Push-Pull Class A, Ultra Linear Mono Block Tube Amplifiers that can be used with several different vacuum tubes including KT77 / 6L6GC / KT88 with a 12SL7 driver and 6NO30 tubes.

Mini fm radio Transmitter circuit Mini fm radio Transmitter circuit  using BF199 This small FM transmitter with a range of about 50 meters designed for hoby. With lots of mini-transmitters then you have a comprehensive, action-packed radio program. Due to the power supply via the USB port of a high frequency stability is achieved. Alternatively, […]

STK058 24w Basic Audio Amplifier Circuit 24Watt Per Channel Stereo Amplifier. High power amplifiers were not my thing but when I realized that music from …………… STK058 24w Audio Amplifier Circuit A simple 24 watt audio amplifier The solderless breadboard makes it easy to experiment with additions to the audio circuit. decided that it was time […]

Aiphone intercom systems – 60W Intercom circuit Using Transformer Parts R1 ………………………… 5K6 R2,5,9 …………………….. 100 R3 ………………………… 47K R4 ………………………… 470K R6 ………………………… 12K R7 ………………………… 68K R8 ………………………… 33 R10 ……………………….. 56 R11 ……………………….. 1K5 R12,13 …………………….. 1K R14,15 …………………….. 0,22/ 5W R16 ……………………….. 3K C1,4,5 …………………….. 104pF C2,3 ………………………. 47uF/16V C6 ………………………… […]