Fan control temperature using sensor LM35

Basic circuit of the LM35 are made to control the fan is either used on amplifier that requires automatic cooling. Its use on power amplifier circuit above and only requires DC fan. From basic sensors based on ic and amplifier op-amp is added again to the transistor Q1 to drive the fan.

Part List :

R1___220K

R2___100K

R3___3K3

R4___22K

R5___1M

R6___150R

R7___2K2

R8___33R 4W

C1___100pF

D1___1N4148

IC1__7915

IC2__TL072

IC3__LM35

F1___DC Fan 12V

Comments

A basic Arduino Solar PV Monitor

I have just recently had solar pv installed, mainly to future proof my energy costs, I do not expect it to be like drilling for oil in my back garden, however the return looks to be encouraging. The install gives you another single unit meter, from this you will see the total amount the panels produce, but that is about it. I wanted to know how much the production was as it was happening, I discovered the light blinks on the front of the meter will flash 1000 times for each kWh of electricity which passes through. The rate of the flashing of the LED tells you how much power is currently passing through the meter. [ ]

8 Problem soluation

This post is under progress

Schematic Audio Amplifier with IC AN7102S

This Schematic use IC AN7102S , this is setereo amplifier and have output speaker 7,5 mW with impedance 32 Ohm . Supply need 1Volt to 3 Volt , wow this amplifier low voltage. You can use this amplifier on radio is use battery . With just one battery with voltage 1,5 Volt you can play this amplifier. See this Schematic below : Click to Enlarge Datasheet IC AN7102S Vcc = 1-3 V Pout = 2X 7,5 mW RL = 32 Ohm Ft = 20hz - 20Khz Icco = 7 mA Package = DIP-18 Manufactered = MATSUSHITA

TREE

Search This Blog