Step 4 Solder the chip CD4011 🛠️ Dive into our collection of DIY Kits, 🔊 Audio Amplifiers, Digital Scoreboards, FM transmitters, and more! 🎶 Explore endless possibilities at our new store. Post navigation Previous: DIY KIT 63- Multi-Functional Simple Electronic Password Lock Circuit Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Please enable JavaScript to submit this form.Name * Email * Website Δ