febb's Profile

Cuk Converter for portable radios powered from Ni-MH battery PUBLIC

Efficient low EMI DC-DC converter Cuk topology to power portable radios from Ni-MH battery

by febb | updated 1 day, 1 hour ago

Cuk Converter for portable radios PUBLIC

Efficient low EMI DC-DC converter Cuk topology to power portable radios from Li-Ion (18650) battery

by febb | updated 2 days, 10 hours ago

34063 DC-DC Step down drives N-MOSFET PUBLIC

Legacy MC34063 chip drives power N-MOSFET in DC-DC Step Down converter. Minimum components.

by febb | updated April 15, 2019

Tachometer for small DC actuator PUBLIC

OP AMP creates shmodt trigger to catch current pulses from brushed DC motor. Then pulses converted to frequency dependent voltage output.

by febb | updated April 15, 2019

34063 booster current control USB light PUBLIC

by febb | updated April 08, 2019

Simple 2 transistors regulated USB LED light PUBLIC

Simple 2 transistors regulated switch mode boost USB LED light

by febb | updated April 01, 2019

OP AMP oscillator PUBLIC

Simple relaxation oscillator with OP AMP

by febb | updated February 28, 2019

Hybrid Power Supply PUBLIC

Hybrid Power Supply from very cheap components

by febb | updated February 12, 2019

power-supply  

Bidirectional current sensor PUBLIC

Bidirectional current sensor

by febb | updated December 05, 2018

Simple Watch Crystal Oscillator PUBLIC

Simplest Watch Crystal Oscillator on 1 transistor

by febb | updated November 24, 2018

Clock LED Backup PUBLIC

NiMH battery backup for LEDs and wall clock

by febb | updated May 19, 2018

AC current indicator PUBLIC

by febb | updated May 06, 2018

Very Simple Crystal Oscillator PUBLIC

by febb | updated April 11, 2018

Heater Fan 1 control V2 PUBLIC

Added uController to control FAN heater

by febb | updated April 11, 2018

Minimal UC3845 Power Supply PUBLIC

Try to design minimum components UC3845 switch mode power supply

by febb | updated February 03, 2018

IR2153 regulated power supply PUBLIC

Frequency controlled IR2153 oscillator allows to build very effective half-bridge regulated switch mode power supply.

by febb | updated December 08, 2017

Voltage control with hysteresis PUBLIC

Simple control loop for IR2153 based switch mode power supply. Hysteresis is needed to turn completely ON and OFF IC oscillator. I could not find better way.

by febb | updated December 04, 2017

Nixie tubes voltage supply PUBLIC

Simple Nixie tubes about 170V power supply

by febb | updated October 17, 2017

UC3843 SEPIC converter PUBLIC

Simple DC-DC converter SEPIC topology

by febb | updated August 26, 2017

34063 Car Charger improvement PUBLIC

Adding simple diode D2 in switch collector circuit helps to reduce by 50% chip power dissipation and to increase substantially output current.

by febb | updated August 26, 2017