VCO with LM331
This Circuit is a simple Analog to Digital Interface with a capability of 10 to 12 bits resolution. 10 bits means 1024 counts or parts of a full scale FS which is close to...
Door access controller with Biometrics
I am trying to design a 4 door access controller. I have a complete working board of fingerprint scanner with DSP for fingerprint verification and authentication.
Ramp Generator – Triangle Wave Generator
Two questions on Ramp Generators – I need a circuit design for a ramp generator. The ramp generator circuit that I’m looking for is a 1khz ramp generator capable of + to -50 v...
1 Hz or 1 PPS Crystal Clock Base
The CD4020BC, CD4060BC are 14-stage ripple carry binary counters, and the CD4040BC is a 12-stage ripple carry binary counter. The counters are advanced one count on the negative transition of each clock pulse. The...
Crystal Oscillator – Parallel Resonant
74HCU04 is a chip that was made for this purpose, HCT may not work for such a circuit. C1 and C2 can go to upto 33pF and R2 can be increased to make R2...
Multiplexed Presettable Timer with ICM7217
This was a attempt to make a Sequential Timer with ICM7217 of Intersil, even though it worked well, it was not developed beyond the prototype stage or first iteration. Only when a product is...
Scart to RGBS Circuit
Question – scart to rgbs circuit – SCART Connectors were used for Video and TV – mail from KU Have a look at these examples SCART RGB interfacing SCART connectors used with many European video...
Visual Inspection for Quality Control
Wanted a system for detecting: “missprinting cartons reject” in production – Message: pls give me help about mention subject. Mail from SS You can scan the manufactured objects with a camera connected to computer USB....
