Schematic Power Amplifier and Layout

DC to DC converter step up 9V-15V 3A

Hi-Fi DX Bass circuit using BF197

5 BAND Audio GRAPHIC EQUALIZER AMPLIFIER using KA2223 5 BAND Audio GRAPHIC EQUALIZER AMPLIFIER using KA2223 The KA2223 is a monolithic integrated circuit consisting of an operational amplifier with five resonant circuits and a active filter, an it is suitable for radio-cassette tape recorders, car stereos or music center audio systems. FEATURES Tone control with […]

DTMF TOUCHTONE GENERATOR DIP16 TCM5089N DTMF TOUCHTONE GENERATOR DIP16 TCM5089N

This article means to utilize your old PC to be come a simple controller. Many old PC like 8088 type, 8086, 80286, 80386, or even 80486 already become an obsolete systems. This board using 8-bits of LPT printer parallel data port (DP) to activate the relays. LPT printer parallel port also have 4-bits additional port […]