6 Input Mixer

 

A simple mixer with 3 line inputs and 3 mic inputs using commonly available parts. 

Read More

6 to 12 Volt Power Supply Inverter

This inverter circuit can provide up to 800mA of 12V power from a 6V supply. For example, you could run 12V car accessories in a 6V (British?) car. The circuit is simple, about 75% efficient and quite useful. By changing just a few components, you can also modify it for different voltages.

Part List:
R1, R4 2.2K 1/4W Resistor
R2, R3 4.7K 1/4W Resistor
R5 1K 1/4W Resistor
R6 1.5K 1/4W Resistor
R7 33K 1/4W Resistor
R8 10K 1/4W Resistor
C1,C2 0.1uF Ceramic Disc Capacitor
C3 470uF 25V Electrolytic Capcitor
D1 1N914 Diode
D2 1N4004 Diode
D3 12V 400mW Zener Diode
Q1, Q2, Q4 BC547 NPN Transistor
Q3 BD679 NPN Transistor
L1 See Notes
MISC Heatsink For Q3, Binding Posts (For Input/Output), Wire, Board Read More

Simple Current Limited 6 V Charger Wiring diagram Schematic

This is the Simple Current-Limited 6-V Charger Circuit Diagram. An LM317HV regulator is used as a current-limited charger. If current through R4 exceeds 0.6 A, Ql is biased on which pulls the ADJ terminal of the LM317 HV to ground and reduces the battery-charging current. 

 Simple Current-Limited 6-V Charger Circuit Diagram

Read More