12 Volt DC Fan Temperature Control

Here is a simple circuit based on two transistors that can be acclimated to ascendancy the acceleration of a 12 V DC fan depending on the temperature.A thermistor (R1) is acclimated to faculty the temperature. When the temperature increases the abject accepted of Q1 (BC 547) increases which in about-face decreases the beneficiary voltage...

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IC 74LS00 Square Wave Generator

This is a very simple square wave generator circuit built with IC 74LS00 that can accomplish aboveboard signals with frequencies amid 20 Hz and 1 MHz. Its adherence is acceptable abundant for a lot of applications. The achievement freq. is dimensioned through the RC apparatus and time adjournment of the 3 inverter gates. The time adjournment...

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Electronic Code Lock With 1 Transistor

This is of advance the simplest electronic code lock circuit one can make. The circuit uses one transistor, a broadcast and few acquiescent components. The artlessness does not accept any access on the achievement and this ambit works absolutely fine. The circuit is annihilation but a simple transistor about-face with a broadcast at its...

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3 Channel LED Driver using CAT3063

The circuit diagram of a three channel LED driver circuit using CAT3063 is apparent here. C4 is an ascribe clarify capacitor. R1 is the resistor acclimated for programming the achievement current. C3 is the achievement clarify capacitor. C1 and C2 are the accumulator capacitors of the centralized allegation pump circuit. A argumentation...

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5 Channel Radio Remote Control

This article is about an easy 5 channel radio remote control circuit based on ICs TX-2B and RX-2B from Silan Semiconductors. TX-2B / RX-2B is a remote encoder decoder combine that can be employed for remote control applications. TX-2B / RX-2B has five channels, wide operating voltage range (from 1.5V to 5V), low stand by current (around...

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LM1758 A Switching Regulator Circuit

The National Semiconductor LM 1578 A is a switching regulator which can simply be created for such dc-to-dc voltage, conversion circuits as the buck, boost, and inverting configurations. The LM 1578 A features a unique comparator input stage that not only has separate pins for each the inverting and non-inverting inputs, however also provides...

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BA5417 Stereo Power Amplifier

Setup and dealing of this stereo power amplifier circuit is somewhat similar to the BA5406 based mostly stereo amplifier circuit revealed previously. C10 and C11 are DC decoupling capacitors that block any DC level present in the input signals. C2 and C6 couples the amplifiers left and right power outputs to the corresponding loud speakers....

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Mini FM Transmitter using MAX2606

With MAX2606 you can make a Mini mono FM transmitter. It is built with MAX2606 and covers at least 20 meters with 1.5 m length of copper wire antenna. You can use this transmitter as an oscillator, but change the 1000pF capacitor of the antenna with 15pF.MAX2606 transmitter output power is-10dBm, which means something around 100uW (micro-watts)...

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