Circuit power supply 5V 5A by 7805+Mj2955 This is circuit 7805+Mj2955 power supply 5V 5A for digital circuit.Q MJ2955 for to increase form IC 7805. Q A16 for overload protect.

This is a classic signal mixer that is used for audio purpose. VR1 & VR2 are inputs audio volume controlers and VR3 is used to control the balance between Input1 and Input2. connect a dynamic microphone to Input1 and a music without vocal to Input2, then adjust the VR1, VR2 and VR3 for obtaining a [...]

AVR Thermometer TCN75This small thermometer board uses the Microchip TCN75 device. It is a cheaper clone of the LM75, it costs about 2,50 Euro. The TCN75 comes in a SO8 packaging. The TCN75 is a serially programmable temperature sensor. It has an output that is programmable as either a simple comparator for thermostat operation or [...]

This RF Amplifier is used for boosting small fm transmiters and bugs. It use two Philips 2N4427 and its power is about 1Watt. At the output you can drive any linear with BGY133 or BLY87 and so on. Its power supply has to give 500mA current at 12 Volts. More voltage can boost the distance [...]

Portable iPod charger that you can use while away from your computer. The circuit is based around an MC34063 switchmode regulator. This has high efficiency so that there is very little heat produced inside the box, even when delivering its maximum output current. The circuit is more complicated than if we used a 7805 3-terminal [...]

40W Amplifier by 2N3055+MJ2955The 40W Amp OCL 2N3055+MJ2955 is easy to build,and very inexpensive. To use Power Supply +35V -35V >2A.Transistor 2N3055+MJ2955 must be mounted on heatsink.Can be directly connected to CD players, tuners and tape recorders.

Parts:R1, R2, R5, R6 22 kOhm (SMD 1206)R3, R4 2,2 kOhm (SMD 1206)R7, R8 4,7 Ohm (SMD 1206)P1 4,7 kOhm, potenciometr logaritmický stereo RadiohmC1, C2, C7, C8, C9 100 nF (SMD 1206)C3, C4 100 µF/10 VC5, C6 470 µF/10 VC10 47 µF/16 VIO TDA2822M

Parts:R1 33 ohm D1 1N4007R2 10 kohm U1 B250C1000RR3, R8 5,6 kohm T1, T2, T3 BC548BR4, R7 100 kohm ZD 6,8 V, Zener.R5 2,7 Mohm LED1 ?ervená / red, standardR6 680 kohm LED2 zelená / green, 2 mAR9 47 kohm IC1 HEF4541C1 100 mikroF/25 V(35 V) C2 1 mikroF,clips from old batteryC3 100 pFC4 100 [...]

R1 10 kOhmR2 1,5 kOhmC2 100 uF/16 V, submini.C3 22 uF/16 V, submini.D2 Zenerova dioda 5,1 VD6 Zenerova dioda 8,2 VD3, D4, D5, D7 1N4148Q1, Q2 BC547Bhttp://www.ic-prog.com/