Aggravation leads to product change
I sold a TinyTimer-Classic with assembly today. The assembly went fine… the testing did not. After several hours I concluded that sharing the MOSI/MISO lines was causing grief. After wrestling with several alternatives, I decided to retire TinyTimer-Classic. It will be replaced with an upgraded board called TinyPLC. This is an Atmega328 based unit and […]
Received TinyTimer-Duo boards and then ordered a new set
I received the boards for the TinyTimer Duo… and confirmed that they too had two mistakes. I corrected the mistakes and ordered a new set. The following changes were logged: Fixed Oscillator and capacitor sequence. Added 10K resistor to reset button Changed labels on logic inputs to reflect the pin they connect to Changed filter […]
Testing a transistor, relay, resistor combination to ensure long term success
I originally designed the tiny timer using an MJE3055 transistor. I did this because I had one laying around. Always a great excuse when hacking a project. For production purposes, that’s not usually the best choice. I decided that I would change over to one of my favorite transistors, the BC517. It’s a high amplification […]
New Prototype boards ordered for TinyTimer Duo
I spent some time this evening revising TinyTimer Duo. I made both relays capable of handling AC loads. I also added a second input, and switched the chip in the design to an Atmega328p-PU which is the same as what is in some types of Arduino boards. This makes it fully compatible. The inputs are […]
