This be simple Adjustable voltage regulator power supply circuit, at use integrated number circuit TL431. By from the circuit can fine volt 3V – 30V, depend on feed volt supply input and change the value R2 , R1. It follow a formula calculates Vout = (1+R1/R2) , Vref = 3V-30V , but this circuit gives current get not tall 100mA only. It just if want to enhance current , must use the transistor helps to enlarge current, such as 2N3055, TIP41 numbers or the other. View IC-TL431 Related Links Adjustable dc voltage regulator Small power supply circuit 2N3055 adjustable power supply 10V-14V schematic Simple power supply variable Voltage 0-15V, max output 1A. power supply variable regulated 5V-13V using ca3140 POWER SUPPLY 0-12V 0.7A max 2A

This be simple check pressure level circuit, with integrated number circuit TL431. When use power supply 5Volt in digital circuit. The general feeding signal input be high class logic be High, make have voltage way output be 5 Volt. But enough feed the level logic be Low as a result, make output level voltage be 1.8V this circuit uses the equipment a little 2 pcs. only just as a result can be usable already. Related Links Voltage Detector circuits More circuit by IC TL431 Level voltage indicator circuits Battery Low Voltage Detector using IC 8211 This circuit can use with power supply since 5 volt until 25 Volt. When voltage of power supply or battery agree come to lower location level keeps. It make LED bright show know. Although the circuit this use how many is the equipment not,… Low Voltage Battery Monitor by LM339 This low voltage circuit can [...]

This Voltage Reference Circuit. It used LM334 (ADJUSTABLE CURRENT SOURCES IC) By fix the trend is stable. It make the pressure that pay to come out have tall stability. By can fine decorate VR1 10K Adjust Voltage Output. And You can use Voltage Input power supply at +2.5V to +20V. cause be high class voltage Output be valuable 0.8-5.0V depend on fining decorates VR1 there. Related Links More about Voltage Reference circuit More about Adjustable Current Source circuit More circuit about voltage reference ic Current source with LM317 Constant Current Source LED Drive Switching regulator forms constant-current source

This be simple bounceless switch circuit, In the character electronic switch a kind is one. That be of good quality tall and low noise convenient for the digital. If switch usual apply to digital circuit like to to get into trouble promise disturb easy. It make the circuit works can make a mistake. This circuit uses integrated digital number circuit CD4049 Hex Inverting Buffer. The circuit works model RS flip-flops make a signal comes out to have tall certainty. The equipment adds just also 2 resisters just only. The detail is other , see in the circuit has sir. In addition, we also can build this circuit with other digital ICs such as Simple Bounceless Switch by 4011 My friend want circuit Bounceless Switch,in testing digtal circuit. This is Simple Bounceless Switch by 4011 ( hot IC) The bounceless output have logic digital,it control by S1. Detail more, Please read [...]