Usage of Schmitt trigger NAND Gates
I have a question about your “Long Duration Timer” circuit, del20017 found here ..Long Duration Timer Clock. You have labeled U1 as a 4093. A 4093 is a NAND with schmitt trigger inputs, yet...
Tagged: Timers-Counters
Electronic Timers, Delays, Object Counters, Tachometers, Event Counters.
Some Cyclic Timer Ideas
A product spec and need from my email archive. This indicates how clarity in customer specs can help him get a working solution with less wastage of time and money.
Timer and Counter Modules
U1 CD4541 is a Timer with Long Duration Ability. This timer is started by a low pulse from earlier circuit, when the temperature goes above setpoint, a low state is at U2A inputs, this...
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...
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...
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...
Up-Down counter-timer
(A question answer thread of delabs.net, nearly a decade old) Presettable Up-Down counter-timer I am looking for a schematic for a pre settable Up/Down counter that I can build for my church. It needs...
Presettable Up-Down Counter Timer
When i had put the near Obsolete digital circuits online in the late nineties. One person who works in a public institution in the usa, wanted a modification of one of my existing circuits....
VCO – Voltage Controlled Oscillator using Opamps
This is a Voltage to pulse converter using opamps for measuring speed or rate from a Tacho Motor mechanical coupled to a Conveyor System. See the complete circuit in my site to study other...
Sequential Timer Design
I’m working on a small electronics project but don’t know too much about designing circuits so I figure I would ask someone who knows and this seems like the place. Ok, What I’m looking...
Timer and Counter for RTD System
Thank you for your assistance. My answers are by your questions. Hope this helps. This unit is more for troubleshooting a air flow problem. If the counter shows many 130 Degrees detected or alarm...
Temperature with Timer Triggers Counter
I’m looking at an idea for a circuit design; The idea is to sense a temp of 130 degrees and then light an LED and start a timer delay. The delay would be 3...
