I just made a lucky find in my piles of junk. I have about 175 LM158H Low Power Dual Operational Amplifiers in the TO-99 package. I will be placing some in lab stock here at uCHobby and may include some in TGIMBOEJ shipments but I would like to do some projects with this part. Maybe even layout a board to make 100 kits useful for the electronics hobbyist.
The TO-99 package has 8 long gold plated leads in a circular pattern and a metal can. About 1/4 the size of a US Dime. The white plastic piece you see in this picture is just packing to protect the device legs.
One idea is to make a general purpose Op-Amp protoboard adaptor. Like the other breadboard adaptors I have done in the past. Maybe a sine wave oscillator or a microphone preamp. There are a lot of possibilities.
LM158H Design Contest
Comment with your ideas for a reusable kit. Something that a hobbyist can use as part of other projects or as a stand alone device. I may build your idea into a kit. The top three ideas will receive a free kit of what ever we come up with, assuming we take the next step.
Help me make use of these old electronics parts so they don’t end up in the trash pile. They are nice parts, selling for around $5/each so surely we can find something useful for them to do.
Information at National for the LM158. This includes an online tool for designing amps and filters with the part.
What should we make with these?