Find Jobs
Hire Freelancers

CD4000/74HC logic for moving a device with emergency brake

€30-250 EUR

Completed
Posted almost 3 years ago

€30-250 EUR

Paid on delivery
Based on the the CD4000 and 74HC-series integrated circuits (and perhaps the 555 timer), I need a schematic that implements the following logic (in general): 1) Move a motor (lift) up or down for a predefined time (in seconds) 2) Time could be configured via 8-stage DIP switch 3) An emergency break should also be included (either in Normal Open or Normal Close manner). It should trigger reset to the time and toggle the direction of the next movement. 4) Start condition should be enabled as series of 3 square pulses. Expected ICs to be involved include: NE555P - Timer 555 (at ~2Hz, used as Clock for the entire circuit) CD4020BE - 14-STAGE BINARY/RIPPLE COUNTER CD4040BE - 12BIT BIN RIPPL COUNTER CD4060BE - 14-STAGE COUNTER/DIVIDER AND OSCILLATOR CD4013BE - 2 D-TYPE FLIP-FLOP CD4093BE - 4x2-INP NAND SCHMITT TRIGGER CD4081BE - QUAD 2-INPUT AND GATE CD4021BE - 8-STAGE STATIC SHIFT REGISTER 74HCT109 - 2 J-K FLIP-FLOPS WITH PRESET AND CLEAR SN74HCT00N - 4x2-INP NAND SN74HCT04N - 6 INVERTER CD4001BE - 4 x 2 INP NOR Note: Please stick to them because of the availability in our region. Questions, suggestions and recommendations are always welcome. I can also help the freelancer with my knowledge in case you require assitance from my side (this will not affect the negotiated payment). ;) I need a prototype as an idea (on a breadboard). PCB design is not mandatory.
Project ID: 29944158

About the project

10 proposals
Remote project
Active 3 yrs ago

Looking to make some money?

Benefits of bidding on Freelancer

Set your budget and timeframe
Get paid for your work
Outline your proposal
It's free to sign up and bid on jobs
Awarded to:
User Avatar
Hello, I am a Telecommunications and Electronics Engineer with deep knowledge of digital electronics. I can make your system using an interactive simulation software called Proteus (from Labcenter Electronics), which has all the electronic components we need (gates, fip flops, shift registers, IC 555s, etc.). We can control the direction of rotation of the motor with an H bridge. I give you a guarantee over every body: I CAN MAKE YOUR SYSTEM BEFORE PAYMENT MILESTONE and I send you a video with the simulation, this way YOU CAN SEE YOUR PRODUCT BEFORE YOU BUYING IT. We can do the following: 1- We agree on every little detail about the project, I like to spend a lot of time on this step. 2- I make your system and I send you a video with the simulation. 3- If you are satisfied with your system (and only if you are satisfied), you make the milestone payment to me, and I send you the project. 4-You review the project and release my payment. If there is something you want to change, you can suggest any modification and I will correct it. If you prefer, I can make the system with those components but in my opinion it is better to use a microcontroller, this would greatly simplify the hardware (for example, you can find a Chinese Arduino nano for only 2.70 USD) and also allows to implement the logical behavior that you you need without limitations. Please contact me in the chat. I await your response, thanks in advance and have a good day. Best regards
€150 EUR in 3 days
5.0 (5 reviews)
3.2
3.2
10 freelancers are bidding on average €180 EUR for this job
User Avatar
Best Circuit Design Expert at your doorstep! Dear Client, We can provide CD4000/74HC logic for moving a device with emergency brake as per your requirements. We couldn’t stop ourselves from bidding after going through the description as they are an exact match with our skill set and experience. We have experience in CD4000/74HC based PCB design and know all the intricacies required to get the job done with perfection. With more than 15 Years of experience in PCB Design and Circuit Design in Altium, We can ensure you best quality work and before time delivery. Following is a brief list of expertise that we are carrying: 1. IOT products development 2. Microcontrollers based circuit design – STM32, STM8S etc 3. Smart Products like Smart watch - GSM/GPRS/GPS etc 4. Wireless Products - BLE/WiFi- ESP32/ESP8266/NRF24L01 5. Low Power Battery Products design 6. NE555P,CD4020BE ,CD4040BE,CD4060BE,CD4013BE, 7. CD4093BE ,CD4081BE,74HCT109 , 8. SN74HCT00N,SN74HCT04N,CD4001BE Please answer the following questions: 1 What are your future plans with this project? 2. Are there any specific market standards like CISPER you are aiming? 3. What will be ambient temperature of this product? Let’s have a quick discussion for 5 mins where we would formulate a plan of action of how we shall take this project to the horizons of success. Regards Avi Tech Experts Quality is never an Accident
€250 EUR in 2 days
5.0 (33 reviews)
7.1
7.1
User Avatar
Hello, there. I have read your project"CD4000/74HC logic for moving a device with emergency brake " details. Because i have a lot of pcb experience and can design 12layers PCB If you choose me. then I never disappoint you. I will work hard and honestly, so you could receive best result all time. Regards.
€140 EUR in 7 days
4.8 (8 reviews)
4.4
4.4
User Avatar
Dear sir, Here is my suggestion. We can use atmel-attiny85 microcontroller. It is very easy to program. We can use DIP switches. But I think a potentiometer will be good. We can easily handle timers in this microcontroller. What is the operating voltages of motors? If your described IC are compulsory I can also design that circuit. But microcontroller is the best option. Let me know your opinion. Thank you.
€140 EUR in 7 days
5.0 (13 reviews)
3.4
3.4
User Avatar
Hello, Thanks for posting the project. I am an Electrical Engineer with 30 years’ experience of Customized Product Development for Instrumentation and Control applications. I am based in Kolkata (India) and running a business in the name of "Zetek Systems". I have a good hardware setup and a team for fabrication and testing. Your requirement 1,2 and 3 is clear to me. You want to give three square pulses to enable start condition or to start the operation? In either cases you have to specify the pulse width also, so that the circuit can reset the pulse count it there is long delay between two successive pulses. If the system is only counting the pulses the following situation may arise: two pulses are given quickly and the third pulse is not given. The next time someone is trying to start it will start at a single pulse. Now I am bidding only for a circuit diagram. If you want a physical prototype the charges will be extra. For this project we can discuss more detailed specification, deliverables and milestones through chat. Looking forward to your valued reply. Regards - Debasis Basu
€250 EUR in 15 days
5.0 (1 review)
3.2
3.2
User Avatar
1- General Skills  Experienced Electronics Engineer/Technician.  Experienced Microcontrollers Firmware Developer.  Experienced Schematic Capture/PCB Designer.  Experienced Electronic Prototypes Developer/Researcher.  10+ years Microcontrollers Firmware Developer, 20+ years Electronics Engineering Developer/Repairer/Troubleshooter 2- Electronic Skills  Excelent knowledge of Power Electronics, Opto-Electronics, Industrial Electronics, Digital Electronics, Analogue Electronics. Good Knowledge of design Schematics with Electroinic CADs and Simulators: Orcad, Tango PCB, Pspice for Windows, Texas Instruments Multisim Electronics Workbench 11, Protheus SCH PCB Sim, KiCAD, DipTrace Electronic CAD, Eagle Electronic CAD
€144 EUR in 3 days
1.8 (1 review)
2.6
2.6
User Avatar
hi dear, I just read out your description and i am interested in your project. Am expert in Electronics and also done with it. if you need quality work than feel free to contact me. Thanks.
€250 EUR in 6 days
0.0 (0 reviews)
0.0
0.0
User Avatar
Hi, Let give me this chance. If you agree, I need 2 days to show you schematic How about your think?
€200 EUR in 3 days
0.0 (0 reviews)
4.3
4.3

About the client

Flag of BULGARIA
Veliko Tarnovo, Bulgaria
5.0
2
Member since Nov 5, 2017

Client Verification

Thanks! We’ve emailed you a link to claim your free credit.
Something went wrong while sending your email. Please try again.
Registered Users Total Jobs Posted
Freelancer ® is a registered Trademark of Freelancer Technology Pty Limited (ACN 142 189 759)
Copyright © 2024 Freelancer Technology Pty Limited (ACN 142 189 759)
Loading preview
Permission granted for Geolocation.
Your login session has expired and you have been logged out. Please log in again.