1. When INPUT port hasn't input voltage, that is when A-B/C-D both disconnect, VIN is connected, CD4511 2-pin, 4-pin are low level;
since IC1 the fourth pin is blanking input control port; when BI=0,no matter what other input ports' state are, its output port A-G are all 0;and 7 segment digital tube are all off and not display number.
2. When INPUT port inputs low level which is lower than 0.47V, that is short circuit INPUT C-D port,
VT1 cut off, and its collector output high level;IC1 BCD code input DCBA=0100, after decoding,
IC1 output port B/C/F/E is high level, and others are low level. So digital tube display "L" representing logic low level.
3. INPUT port input 3.13-5V high level, that is short circuit INPUT A-B port, VT1 is connected;
its base and collector are both high level,IC1 BCD code input DCBA=0110; after decoding, IC1 output port A/C/D/E/F/G output high level; and others are low level;digital tube display "H" representing logic high level.
|NO.||Component Name||PCB Maker||Parameter||Quantity|
|13||1-Bit Digital Tube||LED2||Common Cathode||1|
|16||Short Circuit Cap||1|
Finished Product Picture:
Tested by ICStation's Outstanding Partner bzoli5706:
The digital tube display "L" indicates logic Low level.
The digital tube display "H" indicates logic High level.
Learn More Details in the Video:
ICStation doesn't accept any form of pay on delivery. Items used to be shipped after payment. Below are the payment methods we can accept at the moment:
1) Paypal Payment
PayPal is a secure and trusted payment processing service that allows you to shop online. PayPal can be used at icstation.com to purchase items by Credit Card (Visa, MasterCard, Discover, and American Express), Debit Card , or E-check (i.e. using your regular Bank Account).
We are PayPal Verified
2) Bank Transfer / Wire Transfer / T/T
Bank Transfer / Wire Transfer / T/T payment methods are accepted for orders which the total price is up to US$300. The bank will charge about US$50 for the transfer fee if we do the payment in these ways. Feel free to contact us for bank payment details if you need pay via bank.
For other payment method, please contact us at firstname.lastname@example.org for more details.