Organize and Share your Electronics the way you want. Sign-Up for a free account now. It takes only 30 seconds!

Mini Sawtooth generator circuit using transistors

Mini Sawtooth generator circuit using transistors

Am back with another oscialltor circuit, sawtooth waveform this time. I have designed a mini sawtooth generator using simple NPN and PNP transistors. The most highlighting feature about this circuit will be its miniature size and easy to use on the go. You will find more effective sawtooth generators than this but when scaling up the size factor this design might hold the advantage.

CIRCUIT DIAGRAM:

sawtooth-generator-circuit-diagram-transistors

WORKING OF SAWTOOTH GENERATOR CIRCUIT:

The short description is that the circuit uses two constant current sources instead of passive resistor for a more linear rise. While using a resistor in your circuit you will obtain more of a exponential rise. In order to get rid of that i have used these two current sources in here. The two current sources are the two upper transistors. You can use a simple 9V battery to power up this circuit like me or you can go for other power sources.

The two transistors at the bottom form a emulated thyristor. Here this thyristor kind of formation serves the purpose of switching in our circuit. I have used the capacitor C1 for the purpose of charging and discharging. The charging capacitor triggers the thyristor at some point defined by the forward drop of the LED D1 (around 2V) connected to the base of transistor Q2, leading to a fast discharge. As the capacitor discharges very rapidly, the voltage that sustains the thyristor open, drops below the thyristor on threshold, thus disengaging it. Thus in turn forms a smooth Sawtooth wave. The cycle then repeats over and over again, thus we will get a sawtooth waveform in the output point.

SAWTOOTH WAVEFORM OUTPUT:
sawtooth-waveform-output

Here is the output sawtooth wave i have obtained from my circuit, works like a charm from the first time. Hope this circuit was useful to you, try this out and write me your feed backs.

The post Mini Sawtooth generator circuit using transistors appeared first on Gadgetronicx.

Read more Here







 

More Articles to Read

App note: Infrared remote control implementation with MSP430FR4xx
App note: Infrared remote control implementation with MSP430FR4xx
Gesture Controlled Smart Home
Gesture Controlled Smart Home
Design for a Wideband, Differential Transimpedance DAC Output
Design for a Wideband, Differential Transimpedance DAC Output
Wrist thrusters let you fly through the water effortlessly
Wrist thrusters let you fly through the water effortlessly
Bertan/Spellman 225-20R HV power supply teardown
Bertan/Spellman 225-20R HV power supply teardown
Blinking Christmas Lights
Blinking Christmas Lights
Adjusting clock with alarm, hygrometer & thermometer on 1.8″ ST7735 display
Adjusting clock with alarm, hygrometer & thermometer on 1.8″ ST7735 display
Adding an “extra sense” with rangefinders
Adding an “extra sense” with rangefinders
This wireless game controller looks like a rug
This wireless game controller looks like a rug
How to run your ESP8266 for years on a battery
How to run your ESP8266 for years on a battery
Calibration of a 3-Phase Energy Meter Board on the ADE7754
Calibration of a 3-Phase Energy Meter Board on the ADE7754
Making beats on a tiny Arduino DJ controller
Making beats on a tiny Arduino DJ controller
Qinsi-QS5100 Sn63Pb37 solder profile
Qinsi-QS5100 Sn63Pb37 solder profile
Water Detection System
Water Detection System
Professional Hi-Fi 15W Tube Amplifier circuit
Professional Hi-Fi 15W Tube Amplifier circuit
This Arduino machine will judge how sick your ollies are
This Arduino machine will judge how sick your ollies are
Turn an old payphone into a boombox for ’90s hits
Turn an old payphone into a boombox for ’90s hits
Big F’n 3D printer build
Big F’n 3D printer build
Temperature alarm for boiling milk
Temperature alarm for boiling milk
QuadBot is a 3D-printable walking robot for everyone
QuadBot is a 3D-printable walking robot for everyone

Top


Shares