Using LEDs with Battery Power - Here you can learn about
LED and how to use them.
555 has the advantage of having a high drive as well as being
a Mixed Design, Analog Programmable chip. That may be a High
Title for such humble a chip.
It has the capability of a Mini ADC due to its VCO function. It could form even a simple switching supply. Power Line Modems have been designed using this chip.
Voltage Doublers and Multipliers - Diodes and Caps can
boost voltage for low power(current) applications.
Voltage multipliers can be used to generate bias voltages of a few volts or tens of volts or millions of volts for purposes such as high-energy physics experiments and lightning safety testing." I drew this for a person who makes toys.
Timers, Modulators, Trip Relays and even a Timer for The
Humble Bread Toaster. Musical circuits, Piano and Metronome
Galore, it drives Speakers directly. 555 does most everything
The Star of what we used to Know as Chip as IC. Too small today in the days of ASIC and FPGA. But ideal for Education of Electronics and Simple Real times Solutions.
In this circuit a 555 is used to get a Negative Supply from a
9V battery for a portable measurement device.
This is a very simple -5V supply using one 555, useful for analog blocks using FET Opamps using low power. This circuit came up when i had to design limited by inventory. It worked well for its need. It converts Positive Five Volts to Negative Five Volts to create a dual supply.
This +5 to -5 using a 555 Astable Multivibrator.is not a high
efficiency design, in fact it cannot take a heavy load.
Circuits having some CMOS Opamps and a A/D convertor is ok.
Even very small battery designs must avoid this circuit.
This suits well when you want to power an analog amp which has to measure voltages which swing on either sides of zero. It can be used in a LCD based portable measuring instrument running on a rechargeable 9V battery.
Powering a strain gauge amp may be one use, another may be like a RTD temperature meter for -50 to +150 deg C.
On trigger at pin 2, Output goes high, timing cap
charges from 0 to 2/3 Vcc the pin 6 of an internal comparator
senses it & trips. Pin 7 goes low discharging the cap. Pin
3 goes low too. This ends the Timing Cycle. Mixed Signal Chip
- The 1/3 and 2/3 analog voltage levels can control the
operation of the 555 pip 3 Digital output Level. Use a 7555
CMOS 555 to get a CMOS Digital Compatible output.
Images above are from the Original Signetics 555 Datasheet
20th Apr 2020
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