Archive for category: 555 Circuits

555 Timer as an Analog to Digital Converter

555 Circuits | By: Diagram mania

Project Description This 555 timer based circuit is a kind of voltmeter, also an analog to digital converter, that converts the analog input voltage to digital output pulses. The output pulse width is proportional to the difference between the analog input voltage and the voltage across the 4.7 uF capacitor namely 2.5V. It can measure […]

555 Timer/Oscillator Tester

555 Circuits | By: Diagram mania

Source : http://www.uoguelph.ca/~antoon/circ/555test.htm 555 Timer/Oscillator Tester by Tony van Roon Description 555 Tester: The 555-tester above is basically a led flasher circuit but with the 555 removed. Imagen the output being a square-wave pulse with a high and low pulse, and is so indicated by the two leds, one ‘Hi’ and the other one ‘Lo’. When […]

555 DC-AC Inverter

555 Circuits | By: Diagram mania

Source : http://www.uoguelph.ca/~antoon/circ/555dcac.html Parts List: R1 = 10K R2 = 100K R3 = 100 ohm R4 = 50K potmeter, Linear C1,C2 = 0.1uF C3 = 0.01uF C4 = 2700uF Q1 = TIP41A, NPN, or equivalent Q2 = TIP42A, PNP, or equivalent L1 = 1uH T1 = Filament transformer, your choice This DC-to-AC inverter schematic produces […]

555 IC Timer control relay Switch

555 Circuits | By: Diagram mania

This is easy Timer circuit. Control by relay. It use IC 555. This the circuit sets the time to are simple one that interesting , because use IC 555 timer be 8 pin integrated circuits. But can set the time accurate can use by fine while VR1 , and use the the Secretariat of the […]

555 Asymmetric Timer

555 Circuits | By: Diagram mania

Circuit : Andy Collinson Email: anc@mitedu.freeserve.co.uk Description: A timer circuit with independent mark and space periods. Notes: A simple astable timer made with the 555, the mark (on) and space (off) values may be set independently. The timing chain consists of resistors Ra, Rb and capacitor Ct. The capacitor, Ct charges via Ra which is […]

555 Timer 5 to 30 Minute

555 Circuits | By: Diagram mania

Circuit : Andy Collinson Email: anc@mitedu.freeserve.co.uk Descriptipn: A switched timer for intervals of 5 to 30 minutes incremented in 5 minute steps. Notes: Simple to build, simple to make, nothing too complicated here. However you must use the CMOS type 555 timer designated the 7555, a normal 555 timer will not work here due to […]

555 timer pulse generator

555 Circuits | By: Diagram mania

To drive ignition coils is to use a 555 timer pulse generator. A 555 generates a square wave output that triggers the 2N3055. Adjusting the two potentiometers and the value of the capacitor will change the frequency of the output. Read More Source: http://www.geocities.com/mistertippy/schematics/ignition.html Thank you.

555 stepper pulse generator

555 Circuits | By: Diagram mania

Circuit provided by Buy this circuit as a kit from Anykits Specifications The 555 Stepper Pulse Generator kit will help you with the pulse required to drive your favorite DC Servo Motor application. This kit uses the famous 555 timer IC for generating the Stepping Pulse. Input – 5 – 12 VDC @ 25 mA […]

555 Based Voltage Inverter Circuit

555 Circuits | By: Diagram mania

This circuit will convert a positive voltage to a negative voltage, while losing 1.5 volts (approximately). for example, if you’re supplying 9V to the circuit, the output will be -7.5 V. This circuit can also be used as voltage doubler, by using the output as the new ground for another circuit. The maximum current the […]

555 IC Linear Ramp (Sawtooth) Generator-Oscillator

555 Circuits | By: Diagram mania

The Vc1 increases linearly when the pull-up resistor RA in the monostable circuit is replaced with constant current source, generating a linear ramp. The linear ramp generating circuit and the generated linear ramp waveforms illustration is shown in figures below. Current source is created by PNP transistor Q1 and resistor R1, R2, and Re. Ic= […]