Polarized Capacitors and 555
Howdy! This circuit of yours is EXACTLY what I was looking for. TOTALLY cool! However, I have a few questions about it…mostly because I’m a software guy. Astable 555 Timer Flasher. So please bear with...
Category: 555-Circuits
Optical obstacle switch with LM567
This is a simple toy that has many applications. Any object that breaks a light beam will trigger a relay to on condition for a period of time. If direct sunlight falls on this...
Dual Supply +5 and -5 using 555
In this circuit the 12 DC, two wire is converted to three wire +5 and 0 and -5 dual supply useful for op-amps or other interface circuits. You could use 7805 and 7905 low...
Button and four LED Lights
Need a design – Simple one button push button to turn on 4 different LED (3mm Dome) every time you press the button. 555 Circuits, LED Schematic. User Interface Design. JE USA Attached is...
+5 to -5 using a 555 Astable Multivibrator
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...
Frequency Divider 74HCT4040
U1 7555 is a CMOS version of 555. The 555 here is in Astable Oscillator mode, C1 and C4 are decoupling capacitors 0.1uF value, ceramic disc. Mixed and Interface Circuits The output is around...
Display On Timer with 555
This is related to the earlier post. This was done to save battery power. The output of some equipment may be in the form of LED Annunciators In the Security Guard Monitor, an Array...
Running Lights with CD4017
The 555 Astable generates a clock for this circuit, an oscillator giving a square wave output at pin 3 which is counted by 4017 to give a running lights effect. Digital Timers Counters and...
Voltage to Current Convertor using LM723
his Circuit converts a voltage control output from a Process Controller to be converted into a Current Control if the AC-Drive or Valve needs a Current Control Signal.. Significance of Current Loop 4 to...
OR gate with two 555
This shows how to OR gate two 555, when one 555 cycles at a low frequency a valve turns on an off, the second 555 stretches the ON duration of the pulse with a...
555 multivibrator like power oscillator
This is dual 555 multivibrator like power oscillator. This is my contraption and conception but couple of decades old. It appears to have errors. It worked but the document fixing after design worked, not...
LM555 Voltage Doubler
This circuit shows the voltage doubler working with a 555. LM555 has good drive 200mA, both Vcc and Gnd. 555 has the advantage of having a high drive as well as being a Mixed...
