Welcome to your new project. Imagine what you can build here.

Welcome to your new project. Imagine what you can build here.

This is a 2 stage IR sensor circuit intended to be used as a ballistic speedometer/chronograph for my Coilgun. I based it off a common design for IR proximity sensors. There are 2 output pins to a microcontroller, and +/-pins for 2 IR receivers, 2 IR emitters, and 2 green LEDs to show when the stage is active. When the beam is broken the voltage on the microcontroller output pins will change, allowing me to code proper coil stage firing timing. The potentiometers are for tuning the sensitivity.

Time-to-Digital converter plug-on module (shield) for Raspberry Pi B+. The board utilizes a TDC7200 (TI) with a time resolution of ~50ps. The Start/Stop inputs to the TDC can be configured with JP2 from either external signals or coming from the RPi's GPIO5 pin in case a timing signal is present at this pin from another plug-on board on the same RPi. Start and Stop signals can be configured from different signals (coming from the input connectors) or the same source (setting "common" on JP3) either supplied from the Start input connector or GPIO5. Read-out of the TDC chip is done through the RPi's SPI bus.

Battery-powered 555 timer LED flasher with on/off switch, timing network, and indicator LED output for simple oscillator testing and demonstration.

If you are planning to create an MSR account in 2026, using a referral code at sign-up may unlock a small welcome bonus and can also help you earn rewards later by inviting others. This guide explains what an MSR referral code is, how to use it, and what to check before you rely on any bonus offer. What is an MSR referral code? A referral code is a short identifier tied to an existing user account. When a new user signs up and enters the code, MSR can attribute that sign-up to the referrer. Many referral programs provide an incentive such as: A sign-up bonus for the new user A referral bonus for the person who shared the code (after qualifying actions) In this article, the referral code is: kNeyhb11 What you can get in 2026 Promotions can change over time, but referral offers are commonly framed as: $5 sign-up bonus (for the new account) Additional referral rewards (when you share your code and others join) Important: The exact amount, eligibility, and timing depend on MSR’s current referral terms. Always confirm the current offer details on the official sign-up/referral page. How to use the MSR referral code (kNeyhb11) Use the code during account creation, typically in one of these places: Sign up for a new MSR account. Look for a field labeled Referral code, Promo code, or Invite code. Enter: kNeyhb11 Complete registration and follow any required steps (for example, verifying email or completing a first activity). If you already created your account, some programs do not allow retroactive referral credit, so it’s best to enter the code during sign-up. Why MSR referral bonuses sometimes don’t show up immediately Even when you enter a code correctly, bonuses can be delayed or conditional. Common reasons include: The program requires verification (email/phone/identity). The bonus posts only after a qualifying action (first purchase, first task, first transaction, etc.). Tracking may fail if you switch devices, use private browsing, or have ad/tracker blocking enabled. Your account may be ineligible due to region, duplicate accounts, or policy restrictions. Tips to make sure the referral tracks properly To reduce the chance of referral issues: Enter the code before you finish sign-up. Use one device and one browser session from start to finish. Avoid switching networks mid-sign-up (e.g., Wi‑Fi to cellular). Take a screenshot of the referral confirmation (if shown). Frequently asked questions Is the MSR referral code “kNeyhb11” free to use? Referral codes are typically free to use. You’re just linking your sign-up to someone’s invite. Can I use a referral code after I sign up? Some programs allow it within a short window, many do not. Check MSR’s referral terms or help center. Do I get the $5 instantly? Sometimes it’s instant, sometimes it’s after verification or a qualifying step. The official terms will say. Final note (best practice) Referral promotions change, and the safest approach is to confirm the current 2026 offer directly on MSR’s official referral or sign-up page. If you share that link (or the text of the terms), I can rewrite this article to match the exact conditions and wording precisely.

This project features a two-stage counter and LED blinking system utilizing key electronic components: 555 timer, CD4029, CD4511, a 7-segment display, and CD4017. In the first stage, the system executes a countdown from 3 to 7, with each number changing every 1.5 seconds to ensure precise timing. Once the countdown completes, the second stage is activated, triggering an LED to blink at 1Hz continuously for 5 seconds. This innovative design offers a seamless transition between functionalities, making it ideal for sophisticated digital electronics applications. #TwoStageCounter #LEDBlinking #555Timer #CD4029 #CD4511 #7SegmentDisplay #CD4017 #DigitalElectronics #TechInnovation #ElectronicsDesign

The Si824x family from Skyworks Solutions, Inc. includes high-side/low-side isolated drivers specifically designed for high-power (>30 W) audio applications, providing versions with peak output currents of 0.5 A (Si8241) and 4.0 A (Si8244). These drivers operate with a maximum supply voltage of 24 V and feature an innovative isolation technology that offers up to 2500 V input-to-output isolation and up to 1500 Vrms output-to-output isolation, enabling level translations of signals without additional external circuits. Key features include a high-precision linear programmable dead-time generator ranging from 0.4 ns to 1 us, robust transient immunity of over 45 kV/us, a wide operational temperature range from -40 to +125 °C, and overlap protection to prevent shoot-through current damage. The Si824x components are RoHS-compliant and come in a 16-pin narrow body SOIC package, making them suitable for integration in space-constrained designs. These characteristics make the Si824x family ideal for use in Class D audio amplifiers and other high-side/low-side driving applications where high noise immunity and precise timing control are critical.

Constant Fraction Discriminator (CFD) based on: D. M. Binkley, "Performance of non-delay-line constant-fraction discriminator timing circuits," in IEEE Transactions on Nuclear Science, vol. 41, no. 4, pp. 1169-1175, Aug. 1994, doi: 10.1109/23.322878.

Timingcard_PROJECT_SCHEMATICS_BETA_V1

Timingcard_PROJECT_SCHEMATICS_BETA_V1